RE: [Repeater-Builder] MCs2000 and mcs838 "Protocol Entry Error"

[Thomas Oliver]

I think the MCS 2000 cable has a diode in it double check your connections
(diode polarity) If unsure just turn it around.

tom


> [Original Message]
> From: shaultapuach <[EMAIL PROTECTED]>
> To: 
> Date: 4/26/2007 9:39:57 AM
> Subject: [Repeater-Builder] MCs2000 and mcs838 "Protocol Entry Error"
>
> I built a cable for the mcs2000 from batlabs and every time i try to
> read a mcs2000 or mcx838 i get this message "Protocol Entry Error"
> please help me! may some one has a different cable pin out thanks.
>
>
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] 220 Repeater

[Thomas Oliver]

This is a friend of mines repeater currently on the air and working excelent 
condition on everything. Probably won't be cheep cheep but reasonable. It may 
be going to Dayton with us.

tom



For Sale:

> Hamtronics R301-220 receiver in RF tight box

> Hamtronics T301-220 (2.5 watts) transmitter in RF tight box

> Hamtronics LPA-315R (10 watts) Low power Amp in RF tight box

> Spectrum BA-75 (65 watt) Amp in RF tight box

> Link-Comm RLC-Club Deluxe ver 1.79 in 19" rack cabinet

> Davis weather station for Club Deluxe telemetry tower mountable

> Wacom WP-652 BpBr duplexer (4 cans)

> Does not include antenna, feed line, 13.8vdc power supply, or remote base
 radio.

[EMAIL PROTECTED]





- Original Message - 
From: Jesse Stanley 
To: repeater-builder@yahoogroups.com
Sent: 4/26/2007 9:36:56 AM 
Subject: [Repeater-Builder] 220 Repeater


Hello All,

Looking for a cheap 220 Repeater. Anyone have any ideas?

Thanks
Jesse
KD8CHP
 

stime1177594616
Description: stime1177594616

Re: [Repeater-Builder] GE MVS VHF Repeater?

[Thomas Oliver]

Go for it just run it a about half rated power and put a fan on it. We have 
been using mobile radios in repeater service for years with few failures.  
Syntor X radios are my favorite to use as transmitters on VHF you can run them 
at 80 watts with fans.

tom n8ies


- Original Message - 
From: Dave Cochran 
To: Repeater-Builder@yahoogroups.com
Sent: 4/27/2007 10:44:26 AM 
Subject: Re: [Repeater-Builder] GE MVS VHF Repeater?


This child of a brainstorm would be at my own QTH (way out in the sticks), and 
even then I've been considering it more as a educational/learning tool than 
anything else.  What's the fun in doing anything if you don't learn something 
from it?

One of those just to see if it can be done effectively and see if *I* can do 
it, before moving on to bigger projects.  And if all the smoke was to fall out, 
I might be out a total of $50,  but I'd know where NOT to stick the screwdriver 
next time.  

I have a pretty firm grasp of the how's and why's just not entirely sure where 
to start. 




On 4/27/07, [EMAIL PROTECTED] <[EMAIL PROTECTED] > wrote:
At 4/26/2007 16:24, you wrote:

>Mobiles converted to repeater (duplex) operation are explicitly banned
>in many commercial site leases, due to lack of shielding and other
>problems. Be forewarned, if you're planning on building something for
>a modern commercial 2-way site.

Around here, many "commercial 2-way" repeaters were converted mobiles.

Bob NO6B





-- 
--
Every electronic device is manufactured with smoke stored deep inside... only a 
true genius can find a way to set it free.  

RE: [Repeater-Builder] Micor Station Conversion Problem

[Thomas Oliver]

Meter the pins to both the audio squelch board and reciever board and see where 
it is losing voltage while ptt is active (probably losing 9.6 volts somewhere) 
then find 9.6v supply and tie it in directly.  You should have been able to use 
the paging backplane, I did on mine with outboard controller I just yanked all 
the cards but the station control module.

tom n8ies


"BIG BROTHER IS WATCHING YOU!"
This message brought to you by the US Department of Homeland Security


- Original Message - 
From: Jim, K8COP 
To: Repeater-Builder@yahoogroups.com
Sent: 4/29/2007 1:06:30 PM 
Subject: [Repeater-Builder] Micor Station Conversion Problem


I have a Micor Station 100 VHF that was used as a paging base.  I removed the 
backplane and installed a "normal" one and removed the cards for paging, and 
installed normal base station cards.  I completed the conversion (removing 
diode) for allowing the receiver to operate all the time.  Here is the 
problem...The receiver does not stay on when the PTT is pushed on the station 
control card.  Is their a jumper I am missing somewhere?

Thanks,


Jim, K8COP 
 

stime1177866390
Description: stime1177866390

RE: [Repeater-Builder] SEITS Web Site

[Thomas Oliver]

I wonder if someone could mirror their site in case it goes away again.  
http://web.archive.org/web/20031008124650/www.seits.org/index.html

I have had mixed results using wayback machine 

http://www.archive.org/index.php

Sometimes pictures and schematics do not show up so it would be nice to
have someone grab all the info before it goes away.

tom





> [Original Message]
> From: <[EMAIL PROTECTED]>
> To: 
> Date: 5/5/2007 9:14:39 PM
> Subject: [Repeater-Builder] SEITS Web Site
>
> Some of you may remember the SEITS web site that was referenced from 
> time to time on repeater-builder.com.
>
> www.seits.org
>
> I have contacted the holder of the domain and convinced him to activate 
> the web page again.
>
> Notice that this web page is not currently being maintained and was 
> reactivated so those building repeaters would have access to the 
> construction articles. 
>
> It's kind of fun to revisit the old web site and remember being involved 
> in many of the articles and activities!
>
> Any email addresses and links may or may not be correct.
>
> Have fun!!
>
> 73's,
> Randy
> WB0VHB
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] The Big M's Maratrac

[Thomas Oliver]

http://www.batlabs.com/maratrac.html

Moto Maratrac is a decent platform but may not make the most reliable
repeater. They are essentialy a repackaged 16 ch (99 ch) Radius mobile with
a high power amp. The VHF and UHF radios are capeable of doing the agacent
ham bands without retuning as such the recivers have a wide front end and
may not be the best choice for high RF enviroments. The transmitter heat
sink aint enough for high duty cycle especially on UHF. Install fans and
give it a shot. 

 We had several in service (as mobiles) and most developed thier own
different quirks, I think it is due to dirty pins or connectors on the
system board.

The local Moto shop owner had one on his (Ham) Micor repeater as a remote
base and he could change channels up and down remotely by DTMF, it sounded
real good.

For hook up you could take apart the main conector plug and solder your
wires onto the corect pins and reassemble the plug.

Here is what needs to be done for a remote base Maratrac with A7 (99)ch
head.

Function Radio
{Cntrl Cable Radio Conn.}
Black/Shield Ground 8 AWG Black (Main Power)
 Tx Audio  J1 Pin 14

 PTT  J1 Pin 12

Rx Audio  J1 Pin 11
 
COR J1 Pin 18

If COR does not work ( I am prety sure ) you need to run a jumper from J20
pin 3 (telco/prog connector) on the radio chassis interconnect board (HLN
5343B),
to the negative side of C523 on the audio squelch board (audio PA mute).


Have fun.

tom n8ies






> [Original Message]
> From: k6kusman <[EMAIL PROTECTED]>
> To: 
> Date: 5/5/2007 9:10:56 PM
> Subject: [Repeater-Builder] The Big M's Maratrac
>
> Hello all.. Does anyone have any info on the Moto Maratrac as related 
> to making a pair of them into a repeater or using them as remote 
> bases?. How hard are they to move to the ham bands as I have a few that 
> are 42-50, 150-164, 450,470. I have searced around the different sites 
> and can find almost no mention of the Maratrac. I would be interested 
> in hearing any info related to them. Thanks.
>
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] GE ICOM question

[Thomas Oliver]

Although the channel elements are not interchangable the crystals can be
used in either channel element.  There may be exceptions but I have not ran
into any problems  
moving crystals from one type to the other.

tom


> [Original Message]
> From: Eric Lemmon <[EMAIL PROTECTED]>
> To: 
> Date: 5/16/2007 10:31:07 PM
> Subject: RE: [Repeater-Builder] GE ICOM question
>
> John,
>
> No.  The channel elements are both physically and electrically different,
as
> are the crystals themselves.
>
> 73, Eric Lemmon WB6FLY
>  
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of johnmichaelwelton
> Sent: Wednesday, May 16, 2007 12:48 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] GE ICOM question
>
> Are the GE Exec and standard MastrII ICOMs (channel elements) 
> interchangable?
>
> John/N4SJW
>
>
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

[Repeater-Builder] bag phone for repeater 911

[Thomas Oliver]

I scored a bunch of old analog bag phones at Dayton and was wondering if anyone 
has interfaced these to thier repeater for 911. I think it would be a 
worthwhile project but with the number  of cell phone everyone has I don't know 
how much use if any it would get.  These phones do not seem to have any extra 
ports ot hook up outboard stuff but there are some motorola phones that use a 
standard DB25 connector that don't have wires on all the pins.

tom

Re: [Repeater-Builder] bag phone for repeater 911

[Thomas Oliver]

They were three for a dollar and I picked out three just for the cases and
then he gave me the whole box.

tom


> [Original Message]
> From: Jim <[EMAIL PROTECTED]>
> To: 
> Date: 5/21/2007 1:45:28 PM
> Subject: Re: [Repeater-Builder] bag phone for repeater 911
>
> Maire-Radios wrote:
> > February 2008
> > 
>
>
> Thanks! I knew it was soon, but not quite that soon!
>
> Tom-I hope you didn't put much money into those...
>
> -- 
> Jim Barbour
> WD8CHL
>
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Remote Base/Repeater Question From a Newbie

[Thomas Oliver]

He needs a vehicular repeater.

Saw a milk crate full of them at dayton for $50.00 each.

tom


> [Original Message]
> From: Jay Urish <[EMAIL PROTECTED]>
> To: 
> Date: 5/22/2007 4:19:59 PM
> Subject: Re: [Repeater-Builder] Remote Base/Repeater Question From a
Newbie
>
> You could do that if the maxtracs have 16pin logic boards pretty easy..
> But you would really lose some flexability inasfar as link freqs and off 
> duty use of those radios..
>
> Due yourself a favor and pickup a real dual band mobile that will do 
> cross band repeat.. Alinco and icom have some older models that are 
> really good.
>
>
> kdf9511 wrote:
> > 
> > 
> > Hello, I am a new ham op that comes from a commerical LMR background.
> > I am in the process of setting up my home station. It will consist of
> > a few Motorola Maxtracs and possibly some GE Phenox VHF radios
> > reprogramed to the 2m band to hit some of the many local repeaters
> > here in the Houston TX area.
> > 
> > Here is my queston. Is it possible to hook two of these radios up as
> > a repeater to link out to other local repeaters? Right now the only
> > radio I have is a Yaesu FT-470 ht and I want to be able to sit out on
> > the patio with either that or an HT220 that I am getting and use the
> > higher power Maxtrac to hit the repeaters. The ones that I am
> > intrested in are just a little bit too far away to hit with my HT.
> > 
> > Thanks
> > Kerry
> > KE5OFO
> > 
> > 
>
> -- 
> Jay Urish CCNANetwork Engineer
>
> Home)972-691-0125
> Cell)972-965-6229
>
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

[Repeater-Builder] Help ID this tower

[Thomas Oliver]

Need to ID this tower and get an engeneering drawing for the base  it is 150' 
overall.  Any help would be appreciated.


http://i151.photobucket.com/albums/s121/n8ies/P1010155.jpg

http://i151.photobucket.com/albums/s121/n8ies/P1010154.jpg


http://i151.photobucket.com/albums/s121/n8ies/P1010148.jpg


http://i151.photobucket.com/albums/s121/n8ies/P1010145.jpg


thanks

tom


Thomas Oliver
[EMAIL PROTECTED]
EarthLink Revolves Around You.

Re: [Repeater-Builder] Help ID this tower

[Thomas Oliver]

I have been in contact with them and they could not supply me a drawing without 
original owners name location age and serial number none of witch I knew.  I 
can't believe they don't have a stock drawing for that series of tower.

Any other suggestions?

I really need to know what goes in the ground and what sticks out of the 
cement.  I don't want to guess.


tom


- Original Message - 
From: Mathew Quaife 
To: Repeater-Builder@yahoogroups.com
Sent: 6/5/2007 11:06:20 AM 
Subject: Re: [Repeater-Builder] Help ID this tower


Hi Tom, that is a Pirod tower made here in Plymouth Indiana.  The top has been 
modified.  There should be a 3 digit number along one of the legs, and possibly 
a plate near the bottom.  The bolts that goes into the ground is about $140.00 
a piece.  You will find them here..

http://www.valmont.com/asp/communication/specialty_structures/asp/pirod.asp

Mathew


Thomas Oliver <[EMAIL PROTECTED]> wrote:
Need to ID this tower and get an engeneering drawing for the base  it is 150' 
overall.  Any help would be appreciated.


http://i151.photobucket.com/albums/s121/n8ies/P1010155.jpg

http://i151.photobucket.com/albums/s121/n8ies/P1010154.jpg


http://i151.photobucket.com/albums/s121/n8ies/P1010148.jpg


http://i151.photobucket.com/albums/s121/n8ies/P1010145.jpg


thanks

tom


Thomas Oliver
[EMAIL PROTECTED]
EarthLink Revolves Around You.





Shape Yahoo! in your own image. Join our Network Research Panel today!  

Re: [Repeater-Builder] Re: RF RCA Plugs and/or cables

[Thomas Oliver]

I remove the RCA's from the small jumpers inside Mastr II's and MVP's and
make up my own jumpers, just use some sharp side cutters to remove the
black plastic and then de solder the coax, clean them up and add coax of
choice.

tom


> [Original Message]
> From: jgielis <[EMAIL PROTECTED]>
> To: 
> Date: 6/18/2007 10:53:26 PM
> Subject: Re: [Repeater-Builder] Re: RF RCA Plugs and/or cables
>
> Yea Bob
>
> try hamtronics
> they use a RF RCA in their rptr kits,
> and the unit is available as an accessory.
>
> Hope this is what you are after..
>
> John
>
> 
>
> Bob M. wrote:
> > They show some right-angle RF RCA plugs for RG174
> > coax. That's a bit small and probably won't work with
> > RG58 or RG400.
> > 
> > Any other sources?
> > 
> > Bob M.
> > ==
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] Simulcast questions

[Thomas Oliver]

First of all do your MSF's have the high stability oscillators in them? All
TX' need to be within a couple hertz on the same freq all the time or the
users will hear a buzz. You will need to delay the audio being fed to the
different TX's varying amounts according to distance between TX's or the
error will also be noticeable especially where coverage areas overlap. The
easiest way to do this is have all transmitters repeating audio coming from
a main link TX on another band.
There is a formula for the delay required somewhere telling how many
milliseconds per mile.
Sounds like you need some old simulcast paging transmitters. Our group uses
UHF PURC (MSF) 5000's with the advanced control boards and high stability
oscillators. The ACB's allow programming of the audio delay and TX freq. As
of yet we haven't done any simulcasting but have talked about it.

Let us know how it works out.

tom


> [Original Message]
> From: Brian Gerry <[EMAIL PROTECTED]>
> To: 
> Date: 9/22/2007 5:19:59 PM
> Subject: [Repeater-Builder] Simulcast questions
>
> I am looking to set up a simulcast tx with voted rx system on VHF hi 
> band (2 meters) using 3 MSF-5000 digital capable stations, with spectra 
> tac rx'ers.
>
> I have the repeaters, and a couple rx'ers, but have not played with 
> simulcasting tx'ers.
>
> Can anyone point me towards a "simulcasting for dummies" (oxymoron, or 
> just moronic?) type of page?
>
> What equipment will I need for each site?
>
> Will there have to be a "central controller"?
>
> Thanx in advance for any and all help,
>
> Brian
>
> KE6IYC
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] Can anyone identify this old antenna?

[Thomas Oliver]

Celwave?  I picked up a set of 4 new folded dipoles that look like those at
Dayton one year and they had a Celwave tag on them.

tom n8ies


> [Original Message]
> From: ve3iqzz <[EMAIL PROTECTED]>
> To: 
> Date: 6/13/2008 10:35:55 PM
> Subject: [Repeater-Builder] Can anyone identify this old antenna?
>
> This antenna was used for the old Bell Mobile Phone system on about
> 153 MHz. It was damaged by lightning and replaced. There is no
> identification on it.
> There are pictures in the Photos section, "Unknown Antenna" 
> http://ph.groups.yahoo.com/group/Repeater-Builder/photos/browse/4fbe 
> The harness is made of RG8, RG11, and RG83. There are photos of the
> cable to cable connections also.
> Can anyone identify this old 1970's antenna?
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

[Repeater-Builder] WTB Fan for DeskTrac repeater

[Thomas Oliver]

Anyone have one? 
Motorola part number 59-02131C05


Thanks

tom n8ies

Re: [Repeater-Builder] Re: RadioShack Recalls Power Supplies Due toElectrocution and Fire Hazards

[Thomas Oliver]

>
> The inspector I used checked every outlet in the house, & found one in
the 
> garage that had line & neutral reversed.  It is tagged as such, & is now 
> only used with fully insulated loads such as Christmas lights.
>
> Bob NO6B

My brother lived in a house with two wire plugs he changed to three wire
plugs. He just jumpered the neutral and ground together on the plugs.

It fooled the inspector with the little plug in light up gizmo.


I highly recomend one of these to anyone working around electricity.
http://us.fluke.com/usen/products/Fluke+VoltAlert.htm?catalog_name=FlukeUnit
edStates

Best $20.00 I spent.

tom n8ie

[Repeater-Builder] Tool needed for removing Potentiometer nuts

[Thomas Oliver]

I have a yaesu FT-60 handheld that has a noisy volume pot and need to change 
it, the nuts have slots on the top side of the nut 180 degrees apart and I can 
not get needle nose pliers on them so I need the correct tool.

Anybody know what they are called and where to get one?

tom n8ies

RE: [Repeater-Builder] do you believe this

[Thomas Oliver]

Probably a magnetron under the table.

Correction is
http://www.metacafe.com/watch/1399627/cell_phone_popcorn_hoax_revealed/

tom


> [Original Message]
> From: Ron Wright <[EMAIL PROTECTED]>
> To: 
> Date: 7/13/2008 11:10:06 PM
> Subject: [Repeater-Builder] do you believe this
>
> hi all,
>
> This kinda repeater related, but do you believe this:
>
> http://www.koreus.com/video/telephone-portable-mais-popcorn.html
>
> Popping pop corn with a cel phone video.
>
> 73, ron, n9ee/r
>
>
> Ron Wright, N9EE
> 727-376-6575
> MICRO COMPUTER CONCEPTS
> Owner 146.64 repeater Tampa Bay, FL
> No tone, all are welcome.
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com 
> Version: 8.0.138 / Virus Database: 270.4.10/1549 - Release Date:
7/12/2008 4:31 PM
>

RE: [Repeater-Builder] 12v 24 hr timer high current circuit needed..or means of external power cycling

[Thomas Oliver]

Check your Cat manual I am pretty sure they know of this problem and have a 
description of the remote dtmf decoder thing you are speaking of.

tom


- Original Message - 
From: Rusty Boling 
To: repeater-Builder@yahoogroups.com
Sent: 7/16/2008 12:01:59 AM 
Subject: [Repeater-Builder] 12v 24 hr timer high current circuit needed..or 
means of external power cycling

RE: [Repeater-Builder] Curious Situation

[Thomas Oliver]

Welcome to the wonderful world of duplexers.  When I first started messing with 
repeaters I used nothing more than a signal generator with attenuator and an ht 
with a bar graph signal strength meter. That and a dummy load is the minimum  
you really need to do a decent job.  I replaced a 2 meter receiver with a 
hotter receiver one time and experienced reduced rx coverage much as you 
described, I traced it down to the cable between the transmitter and duplexer. 
This was causing the transmitter to see some reflected power looking into the 
duplexer. As per Wacom manual I started adding a couple inches at a time until 
the reflected power went away. I ended up having to add about six inches to 
what I had. The hamtronics receiver wasn't bothered by the resulting effects 
from the mismatched transmitter load but the Spectrum was. My duplexers were 
tuned at the factory I suppose on a network analyzer that is supposed result in 
a perfect 50 ohm input, trouble is my transmitter was not a perfect match hence 
the reflected power. By adding length to the cable I was making a transformer 
that made the receiver happy.  This may not have anything to do with your 
problem at all. You need to check your antenna match first then see if your 
transmitter is seeing the same SWR when the duplexer is in line it should be 
the same.  You need  a way of quickly turning the transmitter on and off while 
listening to a weak signal. If the signal improves when the transmitter is off 
then you are experiencing de-sense. This could be caused by many things. Bad 
cables or connectors or feed line or duplexer or too much power or spurious 
transmitter or poor receiver or... the list goes on. you need to give us a 
rundown on what your system consists of - what antenna feed line connectors 
cables transmitter and receiver are you using.


tom


- Original Message - 
From: Michael Ryan 
To: Repeater-Builder@yahoogroups.com
Sent: 7/29/2008 11:36:32 PM 
Subject: [Repeater-Builder] Curious Situation


Rber’s,   I posted a note very early this week about my looking for a someplace 
to get a 220 duplexer tuned in the TAMPA area.  Having not much luck I 
contacted a local MOTOROLA shop and paid $95 for the service.  The receipt 
returned with the cans indicates that the specifications published by WACOM are 
very close.  Having tuned these merely to incoming signals before, peaking them 
while the repeater is still in a testing mode, seemed to return decent results 
but the tune-up was thought to be a better idea.  Not so….  Today’s tune-up 
hardly was worth the wait or the price based on the results.  While a 5 watt HT 
10 miles away could work the repeater, now 25 watts from a roof top antenna is 
now just about full quieting.  Fifteen watts does not make the repeater through 
the same roof top ground plane.  Does logic dictate that we go back to seat of 
the pants tuning and cast fate to the wind?  - Mike
 
No virus found in this incoming message.
Checked by AVG - http://www.avg.com 
Version: 8.0.138 / Virus Database: 270.5.6/1579 - Release Date: 7/29/2008 6:43 
AM

Re: [Repeater-Builder] Re: Desktrac UHF 40 Watts Repeater Default Archive

[Thomas Oliver]

Maybe it is not a repeater?  Is there two transceiver chassis in the desktrac?


tom


- Original Message - 
From: Camilo So 
To: Repeater-Builder@yahoogroups.com
Sent: 8/20/2008 8:03:08 AM 
Subject: Re: [Repeater-Builder] Re: Desktrac UHF 40 Watts Repeater Default 
Archive


Thank You Mike, now I know what Joe was explaining TWO software means, But I 
don't have a problem programming the Maxtrac on out of band, that I already did,
my problem was in the programming of the Desktrac front panel, to tell the CPU 
on the front panel that it was a repeater, because what I have is blank, that 
is why I am asking the help of this group for the front panel default archive 
that I can dump the info to the front panel, maybe its not a share item??? 
Thanks


73 
W4CSO


- Original Message - 
From: Mike Morris WA6ILQ 
To: Repeater-Builder@yahoogroups.com 
Sent: Wednesday, August 20, 2008 3:39 AM
Subject: Re: [Repeater-Builder] Re: Desktrac UHF 40 Watts Repeater Default 
Archive


At 06:50 PM 08/19/08, you wrote:

Hi Joe,
I am not aware that there is 2 separate software that is use on Desktrac, What 
is the version of the software that program the front panel? So that I can 
order it from Motorola, to my knowledge the only software that is needed to 
program the Desktrac is RVN4080 version R03,04,00. When you try to read the 
unit a screen pop up to tell you turn the switch to position 3, then 2, and 1. 
same as programming the unit, all I need is the default archive to clone the 
unit. Any one on this group Please correct me if I am wrong.
 
 
73
W4CSO

See < http://www.repeater-builder.com/maxtrac/maxtrac-index.html> for Desktrac 
RSS info.

Mike WA6ILQ

 
No virus found in this incoming message.
Checked by AVG - http://www.avg.com 
Version: 8.0.138 / Virus Database: 270.6.6/1621 - Release Date: 8/19/2008 6:53 
PM

Re: [Repeater-Builder] Celwave Circulator

[Thomas Oliver]

Ideally you would want the dummy load to handle all the power the
transmitter put out (and then some) in case of antenna failing, the
transmitter could keep transmitting into the circulator with out even
blinking. It would see close to a 1 to 1 SWR until the dummy load burned up
unless you had an over sized dummy..

35 watt dummys will work just fine as long as your reflected power stays
below what the dummys can handle.

Some dummys have a thermal switch that you could wire to an alarm or kill
the transmitter.


tom


> [Original Message]
> From: Nate Duehr <[EMAIL PROTECTED]>
> To: 
> Date: 8/20/2008 8:36:04 PM
> Subject: Re: [Repeater-Builder] Celwave Circulator
>
> Nevada Amateur Radio Repeaters, Inc. wrote:
> > Ref:  > >
> > 
> > I looked at the Celwave dual stages circulator rated at 150 watts a
dual 
> > stages with a 35 watt dummy load on each stage. I don’t understand the 
> > design since I have seen and used two stage circulator with a 100 watt 
> > dummy load on the first stage and a 25 watt dummy load on stage two. 
> >  What make two 35 watt dummy loads in series ok? What am I missing?
>
> I saw some weird numbers on some of these recently also when I was 
> trying to compare apples-to-apples.
>
> As best I could figure out, the 150W "rating" from some manufacturers 
> was how much power you could put THROUGH it from the transmitter port, 
> not how much power it was going to isolate coming back down the antenna 
> feed-line.
>
> You may want to see how many dB of "isolation" they rate it for and do 
> the math and see if that's 150W.  I doubt it.
>
> That first load will just get really really HOT if you shove 150W into 
> the antenna side... heh.  Probably burn it up.
>
> Of course, if you have 150W coming back down the antenna... you're on a 
> really wicked site.  (Yeah, I know we've all seen that there ARE some 
> really wicked sites... usually power like that means you're right up 
> against a broadcaster of whatever variety.)  :-)
>
> Nate WY0X
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com 
> Version: 8.0.138 / Virus Database: 270.6.6/1621 - Release Date: 8/19/2008
6:53 PM
>







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RE: [Repeater-Builder] Re: OK, this one is driving me nuts.... VXR-7000 (FIXED!!!) - see post bottom

[Thomas Oliver]

Maybe you could draw it up and post your circuit diagram in the files
section?

tom


> [Original Message]
> From: Jerry Steele <[EMAIL PROTECTED]>
> To: 
> Date: 8/22/2008 3:04:34 AM
> Subject: [Repeater-Builder] Re: OK, this one is driving me nuts
VXR-7000 (FIXED!!!) - see post bottom
>.

RE: [Repeater-Builder] Need some help- M-10 related

[Thomas Oliver]

You certainly can use a duplexer at the input and output spread you listed and 
it should work quite well.

tom


- Original Message - 
From: Peter Dakota Summerhawk 
To: Repeater-Builder@yahoogroups.com
Sent: 8/25/2008 11:45:59 AM 
Subject: [Repeater-Builder] Need some help- M-10 related


OK, got the M-10’s in the mail yesterday and will have to get them over to the 
shop to program them. What I got for a freq spread is:
151.835 and 153.020 so I can t use a duplexer and will have to run a dual 
antenna system. How far apart do I have to mount these to make sure they work 
ok? I have a Motorola RICK to use and want to have the units programmed for 
around 15 watts or so that way I don’t burn out the radios when we really need 
it. I am thinking that the 153.020 is going to be repeater input and the 
151.835 is the output. I will be running DCS on the system to avoid problems 
with the system. The radios (CP200) are going to be programmed with MDC1200 
signaling as the supervisors carry a HT1250 so they can see who keys up and if 
there are any problems.
I need some help on getting the antennas set up and I can program the rigs for  
the repeater use so no problem there.

Thanks

Peter Summerhawk-N0WRE


 
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Checked by AVG - http://www.avg.com 
Version: 8.0.138 / Virus Database: 270.6.7/1632 - Release Date: 8/25/2008 7:05 
AM

RE: [Repeater-Builder] Re: MSR-2000 9.6v power?

[Thomas Oliver]

Maybe you could use a fixed 9 volt three terminal regulator and lift the
ground through a diode?  Should give you 9.6 I think.

tom


> [Original Message]
> From: skipp025 <[EMAIL PROTECTED]>
> To: 
> Date: 9/26/2008 11:19:13 PM
> Subject: [Repeater-Builder] Re: MSR-2000 9.6v power?
>
>
> I'm in the process of converting a number of MSR-2000 repeaters 
> over to using switching power supplies (I'm paying the electric 
> bill). I've asked one or two people who have already completed 
> the task and they reportedly used adjustable 3-terminal regulators 
> on well heat sinked mounts for the 9.6 vdc supply. 
>
> s. 
>
>
> > George Henry <[EMAIL PROTECTED]> wrote:
> >
> > Since I have not yet succeeded in getting my hands on the MSR2000
> manuals, does anyone know offhand what the current draw is on the 9.6
> volt supply?  Looking to build my own...
> > 
> > Thanks in advance!
> > 
> > 
> > George, KA3HSW / WQGJ413
> >
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] EMR Corp UHF cavity filters

[Thomas Oliver]

We tried tuning some wacom 900 MHZ band pass cavities on 440 and found ours 
would not tune, the center tuning stub was too long I believe.  Ours could be 
shortened easily I don't know about EMR stuff though.

tom


- Original Message - 
From: Gareth Bennett \(Ihug\) 
To: Repeater-Builder@yahoogroups.com
Sent: 11/8/2008 3:08:48 AM 
Subject: [Repeater-Builder] EMR Corp UHF cavity filters


Hello Group,

Does anybody have a UHF EMR Corp 7" cavity filter (6567 Series) that I could 
ask some dimensioned from please? Such as coupling loop dimensions etc?
I have a heap of 850 MHz 3/4 Wavelength cavities that are surplus and am 
keen to investigate modifying these to 440 MHz 1/4 Wavelength cans.

Any help  would be appreciated


Gareth Bennett

(Technical Services)
Signals NZ Ltd
8 Manor Place
P.O. Box 1439
Dunedin 9015
New Zealand
Phone : 03 425-0895(64 3 425-0895)
Fax : 03 474-5251(64 3 474-5251)
Mobile : 027 458-8377  (64 27 458-8377)
Email   : [EMAIL PROTECTED]
Web: www.signals.net.nz

Note:
This message is for the named person's use only. It may contain confidential, 
proprietary or legally privileged information.  No confidentiality or privilege 
is waived or lost by any mistransmission.
If you receive this message in error, please immediately delete it and any 
copies of it from your system, and notify the sender.  You must not, directly 
or indirectly, use, disclose, distribute, print, or copy any part of this 
message if you are not the intended recipient.

LFT Group Ltd reserves the right to monitor ALL e-mail communications through 
its networks.

Any views expressed in this message are those of the individual sender, except 
where the message states otherwise and the sender is authorised
 

[Repeater-Builder] Motorola CDM1250 COS

[Thomas Oliver]

Does anyone know if COS signal is available at the mic jack on a CDM 1250 
mobile radio?  Rear accy jack is being used by other stuff.


tom


(\__/) ... 
(='.'=) 
(")_(")

RE: [Repeater-Builder] Motorola CDM1250 COS

[Thomas Oliver]

Ok how about PL logic signal?

tom


- Original Message - 
From: Mike Mullarkey 
To: Repeater-Builder@yahoogroups.com
Sent: 11/30/2008 7:05:27 AM 
Subject: RE: [Repeater-Builder] Motorola CDM1250 COS


NO you will need to get is from the connector on the back.
 
Colorado Telecom, L.L.C
Mike Mullarkey
6886 Sage Ave
Firestone, Co 80504
303-954-9695 Home
303-954-9693 Home Office & Fax
303-718-8052 Cellular



From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of 
Thomas Oliver
Sent: Saturday, November 29, 2008 10:25 PM
To: repeater-builder@yahoogroups.com
Subject: [Repeater-Builder] Motorola CDM1250 COS
 
Does anyone know if COS signal is available at the mic jack on a CDM 1250 
mobile radio?  Rear accy jack is being used by other stuff.
 
 
tom
 
 
(\__/) ... 
(='.'=) 
(")_(")
  

Re: [Repeater-Builder] Motorola CDM1250 COS

[Thomas Oliver]

That is correct, it will only fit in  the centered position.


tom


- Original Message - 
From: Brian Poellnitz 
To: Repeater-Builder@yahoogroups.com
Sent: 12/2/2008 10:35:20 AM 
Subject: Re: [Repeater-Builder] Motorola CDM1250 COS


If I remember rightly, Nate, the keying is via 2 ridges on either side of the 
locking tab.  They allow the connector to only be inserted in the "centered" 
position.  If you don't need to flash, the 16-pin kit is the deal, and probably 
cheaper. :)

Brian, N4BWP

Nate Duehr wrote: 


Ahhh... it's keyed. I didn't know that. That'll work. A blocked pin 
on the 16 pin usually, I take it?


.
 
 

Re: [Repeater-Builder] Re: fan timer circuit

[Thomas Oliver]

Perfect Joe, just what I have been looking for.

tom


> [Original Message]
> From: Joe 
> To: 
> Date: 12/21/2008 10:05:17 PM
> Subject: Re: [Repeater-Builder] Re: fan timer circuit
>
> This is a simple timer that I used on my 222 repeater.  When the 
> repeater keys up the fans come on.  After no PTT activity for about 2 
> minutes, the fans go off.  I found this the best way to cool with fans.  
> They have a delay time to remove any residual heat.  They then turn off 
> to reduce the amount of dust and dirt that get circulated.
>
> 73, Joe, K1ike
>
>
> Mike Dietrich wrote:
> > Sounds like the best thing to do is a combination of both the PTT and 
> > Thermodisk versions together.
> > That way the fan starts blowing when users start using the repeater.
> > Then the thermodisk takes over after it heats up until all traffic 
> > quits and the tx'er cools down.
> > Just my 2c worth.
> > Merry Christmas everybody!!
> > Mike
> >  
> >
> >  
> >
> >  
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: OT: Radios and Coms in TV and Movies

[Thomas Oliver]

If anyone wants to own their own genuine Apcor I have about six 
available.without batteries.  $50.00 plus shipping too much?


tom


- Original Message - 
From: Gary Glaenzer 
To: Repeater-Builder@yahoogroups.com
Sent: 12/23/2008 11:06:08 AM 
Subject: Re: [Repeater-Builder] Re: OT: Radios and Coms in TV and Movies



- Original Message - 
From: Doug Dickinson 
To: Repeater-Builder@yahoogroups.com 
Sent: Tuesday, December 23, 2008 9:38 AM
Subject: [Repeater-Builder] Re: OT: Radios and Coms in TV and Movies



>The EMD mobile repeater was a duplex Micor 10 channel radio with a separate 
>Pac_rt radio receiver. The mobile would transmit on the mobile freq and would >
>receive on both the Base channel and a 458MHz channel (there are 4 of them) 
>simultaniously and repeate the audio back out through the mobile freq. 

I recall the 'extra receiver' as being in a shortened Micor Chassis, standard 
Micor plug

Gary
 

RE: [Repeater-Builder] Stabilant

[Thomas Oliver]

Agood source for  99% pure isopropanol (isopropyl alcohol)  is a product
sold under the name Iso-Heat. Available at most auto parts stores.

tom


> [Original Message]
> From: Eric Lemmon 
> To: 
> Date: 1/10/2009 1:58:35 PM
> Subject: [Repeater-Builder] Stabilant
>
> A week or so ago, I posted the statement that Motorola had adopted
Stabilant
> 22A as a preferred electrical contact enhancer, and had given it the part
> number 1180369E78.  I now know that Motorola has discontinued that part
> number and replaced it with 1180384V93, priced at $46.
>
> The difference between the two part numbers is that 1180369E78 was a
> pre-mixed vial containing 15 mL of pure Stabilant 22 and 99% pure
> isopropanol in a 4:1 ratio, AKA Stabilant 22A, while 1180384V93 is a kit
> containing 5 mL of pure Stabilant 22 and an empty 15 mL bottle.  The
> included instructions direct you to put half of the 5 mL Stabilant 22 into
> the 15 mL bottle, and then add either 99% pure isopropanol (isopropyl
> alcohol) or 100% pure ethanol (grain alcohol) to obtain 12.5 mL of
Stabilant
> 22A or Stabilant 22E, respectively.  You eventually wind up with 25 mL of
> the Stabilant mixture, enough to last a very long time.
>
> Be careful to use only extremely pure alcohols for these mixtures, not
> "rubbing" alcohol, because the less-pure versions contain water or other
> adulterants for denaturing or diluting the product.  Methanol (wood
alcohol)
> or denatured alcohol should not be used.  Technical literature,
application
> notes, and MSDSs can be found here:
> 
>
> 73, Eric Lemmon WB6FLY
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

[Repeater-Builder] OT Power Factor

[Thomas Oliver]

Question for any electrical engineers out there.

Are the meters on the side of buildings metering real power or apparent power?

Is power factor correction worth doing if the power company is not dinging the 
customer for low power factor?

This article 
http://powerelectronics.com/power_management/motor_power_management/705PET23.pdf
  talks about residential power factor correction and my conclusion (from this 
article) is the savings would never be recouped. 

Second conclusion is the only benefit with correction is the wires between the 
source and load don't heat up as much. What about the wires in the motor or 
transformer? do they also heat less? I would think so.

Third conclusion is by correcting power factor you are helping the utility 
company more than yourself because these phase differences "standing waves" 
exist all the way back to the power generation source therefore the utility 
lines have more loss due to their greater length than the customers building 
wiring has.

The reason I am researching this is a customer of mine has roughly 50 hp of 
total motors in his shop and wanted to know if he could save 30% on his 
electric bill like some salesman of power factor correction black boxes told 
him he could.

I realize I am going to have to look at his energy bill to see if there is a 
charge for low power factor and maybe call the utility company to see if he 
will get a lower rate if he adds PFC devices


tom



(\__/) ... 
(='.'=) 
(")_(")

RE: [Repeater-Builder] OT Power Factor

[Thomas Oliver]

To all interested:

I have examined my customers energy bills and there is a power factor
number displayed on every bill, in this case .85 or 85%.  Now I don't know
if the meter reader actually is reading that off the meter every month or
not, I suspect they are only interested in the kWh and demand reading each
month but if you watch the digital meter it does display KVAR and some
number as it steps through four or five different readings, guess it would
be nice to know what all those other readings are.

Now for the rest of the story.

I called the utility company, Consumers Energy in this case and asked if my
customer would get a lower rate if he were to bring his power factor closer
to unity.

The answer was "no. There is no rate decrease for power factors of 80% or
greater only an increase if he drops below 80%" even though he spends a
couple thousand on average a month, power factor correction would not
benefit him unless his power factor drooped below 80%.

In a nut shell,  the only people to benefit by installing these energy
saving gizmos are the people who sell and install them and the power
company, don't let anybody try to tell you any different.

The customer had the gizmo salesman call and talk to me and tell me how it
worked, he said "It stores the power until you need it then it puts it back
in to line"

Quote from their website:  http://energy-saver.org/

The Electric Meter Miser

The Best Place to Earn up to a 30% Return!


 Packed with energy storing capacitors, it holds excess energy until you
are ready to draw more from the power grid.  Most appliance motors operate
and expend wasted energy forcing you to demand more energy from your power
source.  This energy-saver stores electricity keeping your bill down to
affordable levels. 

How could I argue with that?

Here is my favorite you tube video, toward the end he is showing a power
factor meter device hooked up to a typical house with an energy gizmo.

With the gizmo off the power factor is .05 thats right 5%, with the unit on
it is increased to .98.

How could I argue with that? 

tom-n8ies

 http://www.youtube.com/watch?v=sOaGB_ehaHM

http://www.youtube.com/v/sOaGB_ehaHM&hl=en&fs=1";>http://www.youtube.com/v/sOaGB_ehaHM&hl=en&fs=1";
type="application/x-shockwave-flash" allowscriptaccess="always"
allowfullscreen="true" width="425" height="344">

RE: [Repeater-Builder] OT Power Factor

[Thomas Oliver]

Forgot to add this:

It's kind of like the fuel powder you put in your gas tank to increase your
mileage.

AUSTIN – Texas Attorney General Greg Abbott obtained a temporary
restraining order and limited asset freeze Monday against Forum Trading,
Inc. The state’s legal enforcement action charges the Texas-based company,
which is organized as a multi-level marketing scheme with independent
distributors, with marketing energy devices it falsely claims will
significantly reduce power consumption, extend the life of household
appliances and save consumers money.


full story here http://www.oag.state.tx.us/consumer/release_view.php?id=2456


tom-n8ies








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Re: [Repeater-Builder] Help with intermod between repeaters.

[Thomas Oliver]

There used to be a couple of high power paging transmitters in town 600 KHz
apart in the 152 MHz range that used to raise hell with several ham
repeaters, glad they are gone now.

tom


> [Original Message]
> From: John Snitcher 
> To: 
> Date: 2/14/2009 8:05:38 PM
> Subject: Re: [Repeater-Builder] Help with intermod between repeaters.
>
> I hate to tell you, a definite way to eliminate 
> the problem, is a frequency change so that the 
> output of the two transmitters are no longer not 600 khz apart.
> It is possible that the mixing is occurring in 
> one of the PA's. If the problem is a mix in the 
> TX, an isolator on the offending TX should solve 
> it. I like the Sinclair isolators.
>
> 2A-B  Most likely a 3rd order intermod product  146.76 X 2 = 293.52
>
> 293.52 - 147.36 = 146.16  Bad place for it to end 
> up on. I have run into this problem several times.
>
>
> Telco : I think you meant to say, the trouble 
> must be on your end, it is leaving here ok... I 
> can't use that excuse, my SXS office does not talk to the outside world
yet...
>
> Good Luck
> John
>
>
>
>
> At 06:34 PM 2/14/2009, you wrote:
> >Bare with me this is a bit long.
> >Our repeater is on 146.76TX / 146.16RX. In the next town the repeater
> >having the problem is on 147.36TX / 147.96RX. Both repeaters are
> >Motorola Micors. Our repeater is a 100 watt PA running about 60watts
> >with a single band pass cavity between TX and a 4 cavity BPBR
> >duplexer connected to 250 feet of 7/8 hard line and a DB224 antenna.
> >The distance between repeaters is about 18 miles line of sight with
> >no obstructions. The other repeater is running a smaller PA driver
> >with an output of 25 watts. I am not sure of the full power
> >capability of this driver. This PA then drives a ¼ KW tube type final
> >set at about 90 watts. This is connected to a 4 cavity BPBR duplexer,
> >200 feet of ½ hard line, and a DB224 antenna.
> >
> >The problem is when the our repeater 146.76 is in transmit and
> >someone keys the 147.36 repeater a loop condition is set up locking
> >on the 147.36 on until the 146.76 drops. Also audio feedback is heard
> >on the 146.36 repeater. This is typical receiver transmitter intermod.
> >
> >Here is what I have done so for. I checked the 146.76 repeater and
> >there is no signal on it on 147.96 or any other frequency other than
> >146.76. I then drove to the 146.36 repeater location and from my car
> >in front of the repeater building duplicated the problem by
> >transmitting on 146.76. As we used to say in the phone business, the
> >trouble is leaving here OK.  Next I put a calibrated receiver on the
> >TX port of their BPBR duplexer and measured about -50DB when the
> >146.76 repeater was on. Also I could not squelch out the .76 signal
> >by holding my hands over the antenna of my handheld radio in the
> >building. There is lots of.76 signal down there so I suspect
> >transmitter mixing of the 146.76 with 147.36 in the .36 PA. But
> >where? I disconnected the ¼ KW PA and hooked the driver up directly
> >to the duplexer and the mixing signal on 147.96 is worse. I then put
> >one band pass 147.36, band reject 147. 76 cavity between the PA
> >driver and the duplexer. To my surprise the mixing signal on 147.96
> >is even higher! I also tried a single band pass cavity with about the
> >same results. Having run out of cavity's I came back home.
> >
> >  I realize their PA driver most likely needs to be checked. If the
> >driver PA is ok they will need 30 to 50 DB of isolation between the
> >147.36 final and the duplexer which will be at least two cavities. I
> >was able to duplicate this mixing with a couple of 2 meter radios, a
> >lossy T connector and a signal generator. I took two high pass
> >cavities out of a duplexer tuning then to pass 147.36 and reject
> >146.76. I ended up with around 70DB of rejection and 2DB in the pass.
> >I recorded the amount of signal needed to cause the mixing. I then
> >put the cavities between the signal generator and transmitter.  To my
> >surprise the amount of signal to start mixing was about the same. The
> >cavities are the type with a T on one port and a compression
> >capacitor for the reject tuning.
> >Some questions I have for the group are:
> >1. What is the best type of cavity filter to use in this situation
> >and where should it be placed?
> >2. Has anyone else seen that, been there, done that, and what was
> >your solution?
> >Any information or ideas will be appreciated.
> >
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>







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[Repeater-Builder] Battery Desulphator for deep cycle batterys

[Thomas Oliver]

Anyone have any info on a what brand Battery Desulphator to buy?

tom


(\__/) ... 
(='.'=) 
(")_(")

RE: [Repeater-Builder] Re: [OT] Urgent request - probably off-topic but please read...

[Thomas Oliver]

We do not live in a free country anymore do we?

tom


> [Original Message]
> From: Nate Duehr 
> To: 
> Cc: 
> Date: 2/27/2009 1:06:07 AM
> Subject: [Repeater-Builder] Re: [OT] Urgent request - probably off-topic
but please read...
>
> Folks, I am not a spammer by trade or by choice in normal  
> circumstances, but I BEG of you to please read this.
>
> If you are even a SMALL enthusiast of Aviation, Aerospace or anything  
> related to breaking the surly bonds of earth and reaching skyward,  
> PLEASE take a moment, I beg of you.
>
> To my friends and members of:
>
> Boulder, CO Linux Users Group
> Colorado Linux Users and Enthusiasts
> Rocky Mountain VHF+ Amateur Radio Group
> Colorado D-STAR Association
> Grand Mesa Contesters of Colorado
> Amateur Radio Satellite Corporation and Mailing List
> Repeater-Builder Mailing List
> MIT PIC Microcontroller Mailing List
> Yaesu FT-857 Mailing List
> VHF Contesting Remailer Mailing List
> The Internet Radio Radio Linking Project
> The D-STAR Digital List
>
> And other friends and acquaintances who will receive this message  
> privately... and anyone you care to forward it to...
>
> Tonight on my way home I fired up my iPod to listen to a podcast by  
> well-known and very well-spoken Steven "Force" Tupper, an aviation  
> enthusiast from Michigan. What I heard chilled my heart to the bone.
>
> The TSA under the auspices of "Homeland Security" has floated a  
> proposal to restrict and in my opinion, DESTROY numerous legendary  
> aircraft, by limiting their use so heavily that you will never see  
> them in the skies over America again.  While this may sound  
> "alarmist", please trust me, it's not.
>
> You all know me, and know that I can write well, expressing my  
> concerns with politics, living, and even the banal things of life in  
> words, fairly well -- but I can not possibly top the writing of Mr.  
> Tupper.
>
> Even more eloquent is his VOICE in his podcast, where he perfectly  
> expresses the frustration, and sheer TERROR that the TSA itself has  
> brought down on the United State's Aviation community with the  
> proposal they've recently released, inappropriately entitled, the  
> "Large Aircraft Security Program", or LASP.
>
> For the best and most intelligent commentary I've heard on the topic  
> to date -- PLEASE ... LISTEN to his podcast at:
>
> 
>
> You really must just hear... his voice.  I do hope his server can  
> handle an onslaught -- if it can't, wait, and listen later.
>
> (I fully intend to help him with the costs associated with  
> distributing his podcast if he needs it this month, it's just that  
> important.  Steve, please let me know if you need assistance.  I have  
> worked in data centers and web-based businesses, and I understand that  
> publishing these things online to large numbers of people, is NOT free.)
>
> It's just over 30 minutes in length, and he NEEDS YOUR SUPPORT -- even  
> if you are NOT a pilot.  He gives instructions in the podcast.
>
> If you honestly do NOT have time to listen, at least READ and RESPOND  
> to his letter in response to the TSA's Notice of Proposed Rulemaking.   
> He needs your input by TOMORROW.  The entire text of his podcast is  
> also available at the link below, if you read faster than you listen  
> -- so to speak.
>
>
  >
>
> If this non-legislative rule change comes to pass, you and your family  
> may never SEE many historical aircraft or have an opportunity to  
> purchase a RIDE in any classic "warbird" aircraft in the skies over  
> America ever again.  The rule is BROAD and affects modern aircraft  
> also, but the aircraft we will miss the most, are the ones of our  
> history that tell our story as a country.
>
> To NOT take action and RESPOND means that you've let a small group of  
> tireless aviation historians, restoration specialists, mechanics,  
> pilots, and everyone who's ever watched an airshow with aircraft from  
> the classic Warbird fleet down.  WE NEED YOUR SUPPORT.
>
> PLEASE read or listen.  Mr. Tupper explains it far better than I  
> possibly can.  The TSA's proposal adds NO security to our nation  
> whatsoever. It's simply government run amok.
>
> Here's a list from Mr. Tupper's website, of aircraft that I personally  
> believe you will RARELY see in the skies of America again, if the  
> TSA's "LASP" passes into being without even so much as a single  
> legislator overseeing it, and little to no due-process available to  
> anyone who violates it.
>
> Aircraft and Max Takeoff Weight (Varies within Type)
> Boeing B-17 Flying Fortress - 65,500
> Chance Vought F4U Corsair - 14,449
> Consolidated B-24 Liberator - 65,000
> Curtiss C-46 Commando - 48,000
> Curtiss SB2C Helldiver - 16,800
> Douglas A-26 Invader - 35,000
> Douglas DC-3/C-47 Skytrain/Dakota - 31,000
> Douglas B-23 Dragon - 32,400
> Fairchild 

RE: [Repeater-Builder] Bird 6733 Load Modification

[Thomas Oliver]

I have been storing one of these for a couple years. Great idea. I think
you may want to keep water in the load while using it and have the drain
loop up higher than the
load so the water doesn't run out of the load when the solenoid valve
closes.

I think they are rated 200 or 250 watts with out water.


tom
 


> [Original Message]
> From: rahwayflynn 
> To: 
> Date: 3/1/2009 5:54:08 PM
> Subject: [Repeater-Builder] Bird 6733 Load Modification
>
> Just finished adding a upgrade to my dummy load.   I had picked up a 
> DA-458/URM (Bird 6733) a while back.  I mounted it on the wall in the
> shack with a coax jumper over to the bench.
>
> The addition was a solenoid valve and a Klixon 4344 thermostat mounted
> on the fin.  When the fin temperature hit 120 degrees, it opens the
> valve and runs domestic water through the heat sink.  The water is
> regulated to 30 PSI to avoid damage to the loop in the 6733.
>
> 200W for 15 minutes did not even get the 6733 warm enough to activate
> the klixon.  I had to test it by aiming a heat gun at the sensor.
>
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] exec I vs exec II

[Thomas Oliver]

I think the exec I had a tube final RX was solid state looks nothing like
an exec II so I would say no.

tom


> [Original Message]
> From: Chris Curtis 
> To: 
> Date: 3/3/2009 5:06:57 PM
> Subject: [Repeater-Builder] exec I vs exec II
>
> Anyone have a "short version" of the differences between an exec I station
> and an exec II station?
> Are the innards swappable?
>
> Thanks for your time.
>
> Chris
> Kb0wlf
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Somewhat OT - How to make HDTV *really* work

[Thomas Oliver]

It really does not matter what channel they are on as the tv's or converter
boxes scan for all possible channels when you install them.

plug and play.

tom


> [Original Message]
> From: MCH 
> To: 
> Date: 3/6/2009 10:33:52 PM
> Subject: Re: [Repeater-Builder] Somewhat OT - How to make HDTV *really*
work
>
> You know, I was doubting the arguments posed by the government, but I'm 
> starting to think they were right. It's just too much for the consumer 
> to grasp DTV as it currently sits. I mean, if a *technical* bunch like 
> this can't understand how a "channel 2" station can be on "RF channel 
> 25", what hope is there for the consumer? Maybe it should be postponed 
> indefinitely until the stations all get their original channels back or 
> they simply change they logo from "Channel 2" to "Channel 25" and forget 
> this alias "XX-Y" channel format.
>
> Joe M.
>
> Ken Decker wrote:
> > Good grief folks, how difficult is this?
> >  
> > Checkout the website site below.  For example: in San Diego it shows 
> > KPBS as channel 15-1.  Click on the call letters. It shows channel 15, 
> > the former analog channel and what it still is identified as..  Then it 
> > shows (RF 30), that's the channel it's on in the digital transition,
but 
> > it identifies as Channel 15-1.
> >  
> > The nice map also shows where the transmitter is located and a 
> > engineering "SWAG" as to the signal level to expect.
> >  
> > 
> > The Digital TV Transition: DTV Reception Maps
> > 
> > http://www.fcc.gov/mb/engineering/maps/
> >  
> > Ken
> >  
> >  
> >  
> > 
> > - Original Message -
> > *From:* JOHN MACKEY 
> > *To:* Repeater-Builder@yahoogroups.com
> > 
> > *Sent:* Friday, March 06, 2009 12:41 PM
> > *Subject:* Re: [Repeater-Builder] Somewhat OT - How to make HDTV
> > *really* work
> > 
> > What is the callsign of the (ch. 7) station we are talking about?
> > 
> > -- Original Message --
> > Received: Fri, 06 Mar 2009 12:35:36 PM PST
> > From: "Chuck Kelsey"  > >
> > To:  > >
> > Subject: Re: [Repeater-Builder] Somewhat OT - How to make HDTV
> > *really* work
> > 
> >  > The same.
> >  >
> >  >
> >  > - Original Message -
> >  > From: "JOHN MACKEY" mailto:jmackey%40usa.net>>
> >  > To:  > >
> >  > Sent: Friday, March 06, 2009 3:28 PM
> >  > Subject: Re: [Repeater-Builder] Somewhat OT - How to make HDTV
> > *really*
> > work
> >  >
> >  >
> >  > > What frequency was channel 7 digital and frequency channel 7
> > analog?
> >  > >
> >  > > -- Original Message --
> >  > > Received: Fri, 06 Mar 2009 08:12:39 AM PST
> >  > > From: wd8chl mailto:wd8chl%40gmail.com>>
> >  > > To: Repeater-Builder@yahoogroups.com
> > 
> >  > > Subject: Re: [Repeater-Builder] Somewhat OT - How to make HDTV
> > *really*
> >  > > work
> >  > >
> >  > >> Paul Plack wrote:
> >  > >> > Jim,
> >  > >> >
> >  > >> > You might want to "READ IT AGAIN" yourself. Here's where the
> >  > >> > misunderstanding started.
> >  > >> >
> >  > >> > John wrote that if the digital is on a very different
frequency,
> >  > >> > reception may be different. Your response was that if your
> > antenna
> >  > >> > worked on one, it should work on the other, "Period." You
> > appeared to
> >  > >> > have a misunderstanding. Don't get mad at people who try to
> > help.
> >  > >> > That's kinda why this place exists.
> >  > >>
> >  > >> No, that's not what I said. I said that if an antenna works
on CH7
> >  > >> analog, it should work on CH7 digital, and if it doesn't, the
> > problem is
> >  > >> the source.
> >  > >>
> >  > >
> >  > >
> >  > >
> >  > >
> >  > >
> >  > > 
> >  > >
> >  > >
> >  > >
> >  > > Yahoo! Groups Links
> >  > >
> >  > >
> >  > >
> >  >
> >  >
> > 
> > 
> > 
> > 
> > 
> > 
> >

> > 
> > No virus found in this incoming message.
> > Checked by AVG. 
> > Version: 7.5.557 / Virus Database: 270.11.8 - Release Date:
3/4/2009 12:00 AM
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

[Repeater-Builder] Radio Interfacing to Dictaphone

[Thomas Oliver]

Trying to interface both transmit and receive audio from a base radio to a 
Dictaphone so both sides of the conversation are recorded, the radio is a CDM 
1250 Mobile.

My thoughts are I need some type of line level mixer with 2inputs for the radio 
side and 1 out to the Dictaphone.  What are you using?


tom


(\__/) ... 
(='.'=) 
(")_(")

RE: [Repeater-Builder] Mastr Exec II question

[Thomas Oliver]

You could use MVP parts they are the same boards just have some pins coming
out the bottom instead of the top. Or I could ship you one for $30.00

tom


> [Original Message]
> From: Jeff DePolo 
> To: 
> Date: 3/16/2009 1:35:30 PM
> Subject: RE: [Repeater-Builder] Mastr Exec II question
>
>
> No, a Mastr II receiver will not fit in an Exec II.  While a lot of the
> circuitry is similiar between the two, mechanically they're different. 
>
>   --- Jeff WN3A
>
>
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com 
> > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of k1jcnh
> > Sent: Monday, March 16, 2009 1:11 PM
> > To: Repeater-Builder@yahoogroups.com
> > Subject: [Repeater-Builder] Mastr Exec II question
> > 
> > A friend has a VHF rptr implemented using a GE Mastr Exec II mobile.
> > The receiver is gone. Can I use a reciever form a straight MastrII 
> > mobile to replace it? Are they plug compatible?
> > Thanks, Joe K1JC
> > 
> > 
> > 
> > 
> > 
> > No virus found in this incoming message.
> > Checked by AVG - www.avg.com
> > Version: 8.0.237 / Virus Database: 270.11.3/1970 - Release 
> > Date: 03/16/09 07:04:00
> > 
> > 
> > 
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] GE Monogram radios - follow-up

[Thomas Oliver]

What he said.

To use the cable you have you would have to have a 25pin serial port on your 
computer or an adapter to adapt the cable to your 9 pin port.

I was fairly successful at programing a GE Monogram with Maxon software but it 
was a long time ago so I don't recall if there were any discrepancies.
tom


- Original Message - 
From: Maire-Radios 
To: Repeater-Builder@yahoogroups.com
Sent: 4/8/2009 11:20:58 AM 
Subject: Re: [Repeater-Builder] GE Monogram radios - follow-up


also the plug you show for the computer goes to the serial port.  you may need 
to get a 25 pin to 9 pin but it is NOT a parallel hook up.


- Original Message - 
From: Mark 
To: g...@yahoogroups.com ; Repeater-Builder@yahoogroups.com ; 
ge-...@yahoogroups.com 
Sent: Wednesday, April 08, 2009 11:05 AM
Subject: [Repeater-Builder] GE Monogram radios - follow-up


Gentle people,

This is in follow-up to the message I posted earlier (below as well). We
have obtained copies of the requisite software - THANK YOU!

Here is a recap of our difficulties. We started by trying to use Maxon
software to reprogram the radios - bad juju, I guess. The problem is that
we couldn't seem to select the proper band for programming the radio. The
radios are UHF, but the software continued to report they are VHF - with
very strange frequency entries as well. There was no option to select the
proper band - only the radio type. These are 10-channel radios, so that
limited out selections to only two choices. Neither worked properly... 

When using the Maxon software, in order to exit from the "READ RADIO" menu,
the software says to simply turn off the radio. For us, this doesn't work -
we need to physically disconnect the radio as well, re-power the radio and
THEN plug the cable back in. And this is when we got the erroneous
frequency/band displays. Now that we have the proper GE software, it
requires the cable to be on the parallel port for proper operation, so now
we have a new problem... 

I am posting copies of photos of the cable we are using. Does this look
like the proper cable? *IF* it is configured for the serial port (as I have
been told the Maxon cable is), can a "gender bender" be used to connect it
to the parallel port and have it work properly with the GE software? (In
order for this to work, the cable pinouts must be the same for parallel as
they are for serial - something I do not know offhand for certain.) Will we
be forced to buy the GE programming cable? Or can we re-wire the 25-pin end
connector for what we need??? (If someone has the proper pinouts available)

Thanks for your assistance so far!
Mark - N9WYS

-Original Message-
From: g...@yahoogroups.com [mailto:g...@yahoogroups.com] On Behalf Of Mark

To the learned group(s).

I am trying to "rejuvenate" some GE Monogram portables that were donated to
my county EMA. They are described in the attached message below. We were
told that some Maxon programming software would work to reprogram them, but
this is not working as desired (i.e., not at all). 

If anyone can point me in the right direction, I'd be much obliged. BTW -
this is ALL I know about these radios. If I am violating some list
provision by requesting GE programming software - please forgive me. I know
that asking for Motorola RSS is punishable by death (or worse), but I don't
remember reading something similar about GE software.

Thanks in advance!
Mark - N9WYS

From: Jim_w9att 

Hi Mark,

Thanks again for helping to diagnose the UHF Radios. The programming
software we need is for the following UHF Radios:

Make: Ericsson GE
Model Number: 344A4209P13
Serial Number (of this particular radio in front of me): 9250445
FCC ID # F3JSP2850
DOC/MDC # 287 194 149P

That's all the markings that it had. Thanks again for your help in trying
to locate the software to program these!

Jim







stime1239204057
Description: stime1239204057

RE: [Repeater-Builder] Ridiculus

[Thomas Oliver]

April Fools Day was last week.

tom


- Original Message - 
From: Lee Pennington 
To: 
Sent: 4/8/2009 4:38:48 PM 
Subject: [Repeater-Builder] Ridiculus







===

THIS IS ABSOLUTLY  REDICULOUS!






Subject: California County Taking Actions To Silence  ALL Ham Activity



From:  www radiobanter com

San Luis  Obispocounty supervisors took drastic  and unprecedented action
yesterday by passing an ordinance that would  prohibit amateur radio
operators, known as "hams", from operating their  transmitting stations. The
measure was put in place to eliminate what  officials said were health risks
associated with transmitters located  close to children. A legal struggle is
expected.

By a vote of 4 to  1 with one abstention, the governing board of SLO county
took action aimed  at addressing a recent Stanford University study that
showed a correlation  between ham radios and attention de ficit disorder and
hyperactivity in  children, as well as nagging reports of interference caused
by radio hams  operating their high-powered transmitters in residential
neighborhoods.

"Our primary responsibility is to provide a safe  environment for children to
live without the dangerous effects of radio  waves constantly bombarding them
and causing proven neurological and  psychological problems," said E. Duane
Nyborg, an attorney who represented  the county in several court cases in the
past year. "Hams are not the only  culprits, but they are usually in very
close proximity to children and are  no doubt a major contributor to the
health problems we've been seeing. The  interference is just the last straw
that convinced the county that  something had to be done about it."

Atascadero city manager Laura Lopez  said that she has seen a tenfold
increase in the number of complaints of  interference from ham radio
operators in the last six months. New housing  developments which have
dramatically increased the population there and  placed homes unusually close
to each other are the predominant  contributing factor. Similar conditions
exist in most of the  county.

"We have radio hams getting into toasters, electric pianos,  light bulbs,
everything, from their powerful transmitters that cause all  this static.
Many of our citizens can't use basic appliances or watch  television because
of all the junk that the hams are broadcasting," she  tol d the Press-Telegram
by telephone.

Hams can't say they didn't  see this coming. They were warned by the county
last year that if they did  not submit to a check of their stations by
officials, they would have  limits imposed on their operation. Few consented
to the searches, which  most decried as invasive. But nobody expected a total
ban on  transmissions.

"This is outrageous. You'd better believe we're going to  fight back and win.
This is a totalitarian seizure of our rights that is  totally illegal and can't
stand up," said Frank Wilson, a local ham club  president. He said there were
no formal plans for an appeal yet but  preparations were underway.

Wilson claims that a federal preemption of  local zoning ordinances, called
PRB-1, delineates three rules for local  municipalities to follow in
accomodating antenna structures such as are  used by hams. But Nyborg says
that PRB-1 applies to antenna structures  only, and not the transmitters used
to feed the antennas with a radio  signal. "We know all about PRB-1. That's
why we said nothing about  antennas. This law is not about antennas. It goes
after the root of the  problem, which is the transmitters that put out huge
signals that get into  the brains of our children and short-circuit them out.
Those are the  facts, that's what the scientific evidence points to," he said
at a news  conference called shortly after the county's action.

In 2008, a grou p  of researchers in the school of Environmental Health and
Safety at  Stanford published their findings that exposure to ham radio
signals for  three hours per day increased the risk of hyperactivity and
related  disorders by 10% in children aged 12 and under. This effect was seen
when  a typical ham radio was turned on up to ¼ mile away. The San Luis
Obispo  city office says that up to 11,000 children in that city live that
close  to a ham radio station.

The Stanford study showed that frequencies  around 3.5, 7, and 14 Megahertz
were the most harmful, but that the danger  existed all the way up to 450
Megahertz and above.

"We know where  the hams are, that information is easy to get on the
Internet," said  former mayor of Paso Robles and current county supervisor
Anthony Wu.  "Most of these guys are running one hundred watts of power, that's
an  incredible amount of radiation, and you can't block it out. It enters
your  house, it gets into your body and does a lot of damage there."

Cindy  MacMahon, 41, of Morro Bay, soccer mom of two and volunteer at city
bake  sales, praised the action by the bo

Re: [Repeater-Builder] Re: MASTR II PTT

[Thomas Oliver]

You need to back up and check things one at a time. 

Does the master II key when you hard ground the ptt line with a solid jumper 
wire?

What is the voltage at the resistor in series with the base of the transistor 
when  the interface is active and when it is inactive?

When it is inactive the voltage should be real low, when it calls for ptt it 
needs to be high enough to cause the transistor to turn fully on taking the 
collector to near ground (.6 above ground typical)

The 2n transistor and a couple of resistors  (usually 10k in series with 
the base lead and a 47k from base to ground)  are all that are required to key 
a Mastr II reliably. I have built several.

Now if you only have 5 volts at your interface when it is suppose to be keyed 
you may have to decrease the resistor value in series with the base of the 
transistor.

Please attach a schematic of what you are using for an interface it would 
eliminate many guesses as to what is your problem.

And pencil in the voltages you observe when active and inactive.

tom



- Original Message - 
From: Chuck Kelsey 
To: Repeater-Builder@yahoogroups.com
Sent: 4/18/2009 8:14:30 PM 
Subject: Re: [Repeater-Builder] Re: MASTR II PTT





Sounds like the transistor isn't biased "on" all the way. Could be the series 
resistor on the transistor base is too high a resistance value or the 
transistor choice was bad. A 2N3904 or 2N should work OK. If you really 
want a "hard" low, use a power mosfet instead of the transistor - like a 2N7000 
or a VN10LP. In that case, the gate would correspond to the base connection, 
the Source goes to ground, and the Drain is your connection to the PTT on the 
radio.

Chuck
WB2EDV
- Original Message - 
From: Vernon Densler 
To: Repeater-Builder@yahoogroups.com 
Sent: Saturday, April 18, 2009 6:05 PM
Subject: RE: [Repeater-Builder] Re: MASTR II PTT


With the simple echolink interace which has a NPN transistor doing the 
switching the voltage across the PTT line and ground is 7v when the com port is 
not active and 6.5v when it’s active.  So I am only getting a ½ volt drop 
instead of a total short to ground.  Is it because the transistor can’t pull it 
down far enough?  Will a transistor with a higher power dissipation help? 
 
Thanks,
Vern

Re: [Repeater-Builder] Re: MASTR II PTT

[Thomas Oliver]

This the circuit I have always used to key a Mastr II with cos voltage
source inside the Mastr II.

It requires a positive going voltage to key the Mastr II I know +7.5 volts
works with the values listed.

tom

<>

RE: [Repeater-Builder] Re: Desense on High Power Linear Repeater?

[Thomas Oliver]

At this point if you need to use the amplifier your best bet is to just
reduce the output until the desense goes away and call it good.

tom


> [Original Message]
> From: atms169 
> To: 
> Date: 5/20/2009 10:52:37 PM
> Subject: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
>
> Hey Don, yeah good to hear ya!
>
> Well, the system is at my house.  If I could find a tower (Trust me I
have looked around) then that would make the world of difference.
>
> Its up on my tower about 60 feet (Both UHF and VHF).  The VHF has pretty
good coverage.  The UHF not so much, probably half of the VHF side.
>
> Using LMR400 for both with a 7 dB vertical for the UHF and a 4.5 dB for
the VHF.
>
>
>
>
> --- In Repeater-Builder@yahoogroups.com, "de W5DK"  wrote:
> >
> > Aaron, 
> > Howdy again neighbor! Don't start spreading rumors that its flat in
Texas,
> > it's all downhill to the beach.on second thought it IS flat and the
> > water is bad
> > 
> > Are these the cavities I tuned for you last fall? If so guys these
are
> > typical specs for 4 cans BPBR. Sorry but I couldn't find screen shots of
> > when I tuned them, they were just under 80DB as I recall, and had been
> > fiddled with before I corrected them.
> > 
> > We had a brief discussion that day Aaron, and you are going to hear
support
> > of my suggestions. Location Location Location. Whether its Dstar or
not, you
> > can only squeeze so much range out of a site. You are adding items on
the RX
> > and TX and have exceeded the separation specs of your duplexers. You
may be
> > in the same boat many people are, all the equipment and no place to go.
You
> > need to acquire a better site. 
> > 
> > Are you running the UHF package still? And these are at the same site
right?
> > Tell us the details of the antenna systems-height, feed line (type and
> > length) and antennas? I'm curious of the range differences between the
UHF
> > and VHF after considering the differences in antenna systems.
> > 
> > 
> >  
> > 73
> > Don Kirchner W5DK
> >
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] OT - recommendation needed - battery charger

[Thomas Oliver]

Harbor Freight has a float charger, the price is right and I have some
friends who have bought several and use them for motorcycles and lawn
equipment in the off season and are happy with the performance.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=42292

tom


> [Original Message]
> From: Mike Morris WA6ILQ 
> To: 
> Date: 5/22/2009 4:32:22 PM
> Subject: [Repeater-Builder] OT - recommendation needed - battery charger
>
> Got a friend who is laid up with back problems.
>
> His car has been sitting for several months between uses.
>
> He has already lost one battery from sitting idle.
>
> He wants to purchase something packaged like a trickle charger
> that can be connected to the battery and left there (maybe even
> semi-permanently with a cord hanging out the grille).
>
> Does anyone have a suggestion for such a product ?
>
> Maybe one of the "desulfator" devices ?
>
> Mike WA6ILQ
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] Sinclair - big price jump?

[Thomas Oliver]

About 1 year ago price of metals about doubled, some trippled like lead now
they are almost back where they were so it will take some time before the
raw material cost factor catches up to the lower price of the raw metals if
it ever will.

Then there was the fuel surcharge for trucking the raw materials and the
finished product.


tom


> [Original Message]
> From: Jeff DePolo 
> To: 
> Date: 6/2/2009 12:36:06 PM
> Subject: RE: [Repeater-Builder] Sinclair - big price jump?
>
> > What didn't go way up?
>
> The number of digits to the left of the decimal point in my checking
account
> balance hasn't gone up.  I'm still waiting for all of that stimulus
package
> trickle-down money that our new president promised me.
>
> Jumping in price by 50% over the course of a few years seems kinda steep
me.
> I can't believe that either labor nor materials jumped by that much over
> that timeframe.  Maybe it's the drop in the value of a US dollar?  I think
> US Dollar to Candadian Dollar conversion rate is close to 1:1 now.
>
>   --- Jeff WN3A
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Micor Bi-Level Squelch Circuit

[Thomas Oliver]

I wonder if it is a noise floor problem. How does it act on a service
monitor when it is not hooked to an antenna picking up high levels of noise?

tom


> [Original Message]
> From: Adam Feuer 
> To: 
> Date: 7/12/2009 7:30:11 AM
> Subject: Re: [Repeater-Builder] Micor Bi-Level Squelch Circuit
>
> I am a very big fan of the Micor bi-level squelch.  It's action is 
> second to none on my 440 and 900 system however, I too am having the 
> exact same problem on my 29.540 receiver in carrier squelch.  I just 
> will not take anyone into the noise but rather near quieting signals 
> just "pop out" and disapear under the squelch. I have tried cleaning all 
> of the pins and swapping out the audio control module but nothing seems 
> to help. Interesting enough, this is NOT happening on my 6 meter Spectra 
> Tac!
>
> At the moment, I have placed my 29.540 Spectra Tac aside and replaced it 
> with a GE Mastr II auxiliary receiver on 10 meters.  The results are 
> much better as pertains to the squelch, but this is not to start a Micor 
> vs. Mastr II comparison.something is just not right on 10 meters 
> with a Spectra Tac receiver.  If it can work on all of the other bands 
> (especially six meters!) it should work on 10.
>
> If anyone has any suggestions, perhaps some part changes on the audio 
> control module, they would be greatly appreciated!
>
> Adam N2ACF
>
> kq2h wrote:
> > I've been impressed with the operation of the Micor bi-level squelch
circuit based on the M7716 IC. I use Micor Spectra-Tac receivers
exclusively on 440, 902, 6 Meters and 222 MHz (VHF to 222 conversion) with
excellent results. However, I am perplexed by 10 Meters. The Spectra-Tac
squelch circuit doesn't work well at all. It squelches up on fading signals
that aren't all that noisy and drops out for no apparant reason. It appears
that the squelch is set too high, but it isn't. I've tried different
audio/squelch modules, receiver boards and housings. Even the IMTS
modification which defeats the short squelch tail doesn't help the
situation. When a UHF reciever is substituted in place of the 10 Meter
receiver, the squelch circuit works fine. 
> >
> > An old 25-30 MHz Motrac receiver,  with its simple 3 transistor squelch
circuit, works perfectly on 10 Meters. There are no problems with drop
outs. The receiver squelch remains open well into the noise. This leads me
to believe that the Micor bi-level circuit needs to be optimized for 10
Meters.
> >
> > Does anyone know of any component value changes in the Micor bi-level
circuit to optimize operation on 10 Meters? 
> >
> >
> >
> > 
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >   
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] Re: Micor Bi-Level Squelch Circuit

[Thomas Oliver]

I guess I would then use the Motrac receiver for the time being.

tom


> [Original Message]
> From: kq2h 
> To: 
> Date: 7/13/2009 8:52:26 PM
> Subject: [Repeater-Builder] Re: Micor Bi-Level Squelch Circuit
>
> --- In Repeater-Builder@yahoogroups.com, "Thomas Oliver" 
wrote:
> >
> Tom, the receiver and squelch appear to operate normally when using a
service monitor to generate signal. Noise floor issues can certainly be a
problem, although a Motrac receiver works fine on the same exact antenna.
It's getting blasted by the same noise...
>
>
>
> > I wonder if it is a noise floor problem. How does it act on a service
> > monitor when it is not hooked to an antenna picking up high levels of
noise?
> > 
> > tom
> > 
> > 
> > > [Original Message]
> > > From: Adam Feuer 
> > > To: 
> > > Date: 7/12/2009 7:30:11 AM
> > > Subject: Re: [Repeater-Builder] Micor Bi-Level Squelch Circuit
> > >
> > > I am a very big fan of the Micor bi-level squelch.  It's action is 
> > > second to none on my 440 and 900 system however, I too am having the 
> > > exact same problem on my 29.540 receiver in carrier squelch.  I just 
> > > will not take anyone into the noise but rather near quieting signals 
> > > just "pop out" and disapear under the squelch. I have tried cleaning
all 
> > > of the pins and swapping out the audio control module but nothing
seems 
> > > to help. Interesting enough, this is NOT happening on my 6 meter
Spectra 
> > > Tac!
> > >
> > > At the moment, I have placed my 29.540 Spectra Tac aside and replaced
it 
> > > with a GE Mastr II auxiliary receiver on 10 meters.  The results are 
> > > much better as pertains to the squelch, but this is not to start a
Micor 
> > > vs. Mastr II comparison.something is just not right on 10 meters 
> > > with a Spectra Tac receiver.  If it can work on all of the other
bands 
> > > (especially six meters!) it should work on 10.
> > >
> > > If anyone has any suggestions, perhaps some part changes on the audio 
> > > control module, they would be greatly appreciated!
> > >
> > > Adam N2ACF
> > >
> > > kq2h wrote:
> > > > I've been impressed with the operation of the Micor bi-level squelch
> > circuit based on the M7716 IC. I use Micor Spectra-Tac receivers
> > exclusively on 440, 902, 6 Meters and 222 MHz (VHF to 222 conversion)
with
> > excellent results. However, I am perplexed by 10 Meters. The Spectra-Tac
> > squelch circuit doesn't work well at all. It squelches up on fading
signals
> > that aren't all that noisy and drops out for no apparant reason. It
appears
> > that the squelch is set too high, but it isn't. I've tried different
> > audio/squelch modules, receiver boards and housings. Even the IMTS
> > modification which defeats the short squelch tail doesn't help the
> > situation. When a UHF reciever is substituted in place of the 10 Meter
> > receiver, the squelch circuit works fine. 
> > > >
> > > > An old 25-30 MHz Motrac receiver,  with its simple 3 transistor
squelch
> > circuit, works perfectly on 10 Meters. There are no problems with drop
> > outs. The receiver squelch remains open well into the noise. This leads
me
> > to believe that the Micor bi-level circuit needs to be optimized for 10
> > Meters.
> > > >
> > > > Does anyone know of any component value changes in the Micor
bi-level
> > circuit to optimize operation on 10 Meters? 
> > > >
> > > >
> > > >
> > > > 
> > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >   
> > >
> > >
> > >
> > > 
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> >
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] wp-639 -- How far should I expect to move the invar rods?

[Thomas Oliver]

Watch your signal strength meter on your radio. The input signal may not be
weak enough to hear a "noisey-quiet-noisey" Actually while tuning for a
notch you need to be listening to the freq you are trying to notch and it
will be a "quiet-noisey-quiet" as you move the notch rod on the side. Tune
for most noise (weakest signal).


First consult the tuning instructions on where to set the notch adjustment
rods for starting point.

You should set all the (4) pass adjustments first
You have to tune the pass first, that is the threaded rod in the center of
the can. You can do this by transmitting (you can use an HT or mobile on
low power for this) on the freq you want to pass and adjusting (not while
transmitting)  for least reflected power into a dummy load or antenna. Do
this one can at a time then put them all back together and terminate the
open port into a dummy load. check the reflected power again it should be
very close to where it was with only one can if not you can tweek the first
pass adjustment.
Do not move the pass adjustments again.

Now for the notch you will have to be receiving a weak signal on the freq
you want to reject (this is where a variable attenuator helps) and adjust
the rods on the side of the cans you just set for the freq you wanted to
pass. Adjust the rods for weakest signal on your signal strength meter.
Adjust one then the other until you get the weakest possible signal. You
will have to move the rods "as far as it takes" there is no set answer as
to how far to move the rods.

Then repeat the above notch adjustment procedure for the other set of cans.
hope this helps.

I have tuned several with nothng more than a signal generator and a ht with
a signal strength meter. After I got the right equipment I found little to
no improvement in performance when retuned with the service monitor. 

tom


> [Original Message]
> From: hbbcara 
> To: 
> Date: 7/18/2009 10:44:30 PM
> Subject: [Repeater-Builder] wp-639 -- How far should I expect to move the
invar rods?
>
>
> Hi all,
>
> In tuning the reject for a wp-639, how far should I expect to move the
> invar rods to find the notch?
>
> In tuning mine (the poor man's way - system on the air receiving a  weak
> station) I didn't find a definite place I"d call a null.  There was more
> noise on the signal with the rod pushed most of the way in and less
> noise with the rod most of the way out, but it was a gradual change.  I
> expected to find it noisy with the rod mostly in, noisy with the rod
> mostly out and at some point in between a quieter spot.
>
> SO my question is, should I hear a definite 
> pattern as I move the rods and if so, over how much motion of the rods
> is it likely to fall?  An inch? Half-inch? Three inches?  Or would that
> pattern only be noticeable with "the right equipment."
>
> (Some background - the duplexer is from an uncertain origin, but it has
> a factory sticker saying 146.97 - 146.37 with the ports marked "high
> input" and "low input."  I'm using it on 146.88/28 so it shouldn't be an
> "upside-down" issue.)
>
> Thanks for any info!
>
> rj
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Micor Repeater

[Thomas Oliver]

"well take the 9.6 volt circuit off of the TPN1121a and go from there  no 
transformer"

That is basically what the factory battery back up supply does. There is a 
relay that isolates the rest of the power supply from the batteries. See if you 
can get  a copy of the manual for the battery back up supply. You should be 
able to modify the standard supply easier than building a separate supply for 
9.6v and have better reliability.

tom


- Original Message - 
From: Maire-Radios 
To: Repeater-Builder@yahoogroups.com
Sent: 9/29/2009 8:15:21 AM 
Subject: Re: [Repeater-Builder] Re: Micor Repeater






well take the 9.6 volt circuit off of the TPN1121a and go from there  no 
transformer
John

- Original Message - 
From: MCH 
To: Repeater-Builder@yahoogroups.com 
Sent: Tuesday, September 29, 2009 4:52 AM
Subject: Re: [Repeater-Builder] Re: Micor Repeater


  
Maybe you missed a key part...

"Site owner does not want a micor power supply."

The 12V only is not the issue - it's the fact that the chassis has to be 
run off 12V when it requires a 9.6V secondary supply.

(unless you put the TPN1121A in a big, black box and call it a 9.6V 
converter) ;->

Joe M.

burkleoj wrote:
> Ralph,
> Motorola did make a special power supply for running the Micor station off of 
> a 12 volt battery system. It is Model TPN1121A.
> 
> They are fairly rare but very nice. I use these on our solar sites here in 
> Western Oregon for our Micor repeaters.
> 
> I would be surprised if you could not come up with one of the TPN1121A power 
> supplies in your part of the country, where solar sites are fairly common.
> 
> Joe - WA7JAW
> 
> --- In Repeater-Builder@yahoogroups.com, "Ralph S. Turk"  wrote:
>> I am building up a Micor repeater using a unified chassis 
>> for use in Montana on a Mountain site. Site owner does not 
>> want a micor power supply. He has station batteries and charger 
>> system. 
>>
>> Does anyone have a regulator circuit to make the 9.6 vdc and audio 12 vdc 
>> necessary for the unified chassis? I am sure I could design a circuit using 
>> a 3 leg adjustable regulator and a pass transistor. Just don't want to 
>> reinvent the wheel if I don't need to 
>>
>> Ralph, W7HSG
>>
> 
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> --
> 
> 
> Internal Virus Database is out of date.
> Checked by AVG - www.avg.com 
> Version: 8.5.387 / Virus Database: 270.13.38/2274 - Release Date: 07/31/09 
> 05:58:00
> 






stime1254226519
Description: stime1254226519

Re: [Repeater-Builder] Spinning disk wattmeter...

[Thomas Oliver]

I bought some off ebay a couple years ago I think this is the same guy.

I have $25.00 into mine so it would be cheeper to get yours directly from
him.

tom

http://cgi.ebay.com/single-GE-I70-meter-watthour-watt-electric-utility_W0QQi
temZ250505742954QQcmdZViewItemQQptZBI_Electrical_Equipment_Tools?hash=item3a
534e4a6a&_trksid=p3286.c0.m14


> [Original Message]
> From: Mike Morris WA6ILQ 
> To: 
> Date: 10/5/2009 3:17:23 AM
> Subject: Re: [Repeater-Builder] Spinning disk wattmeter...
>
> At 06:34 PM 10/04/09, you wrote:
> >I have one that I use every once in a while.  It works well at 
> >determining the power usage of a repeater at a site.  I don't want 
> >to give mine away, but I would lend it out to you.  I will want it 
> >back, though.  It weighs about 15 pounds, so shipping and the 
> >eventual return shipment may be more than he wants to spend.
>
> I appreciate the "loan" offer, both from you and from
> several others, but I think that he (or I) will want it
> around for making measurements in the future.
>
> >I found mine at the dump.  It is a 120VAC 15 Ampere, 60 cycle, 
> >2-wire unit.  I even got the box with it, and I put an AC cord and 
> >plug on the box.  This evidently came off one of the old summer 
> >homes that are around the local lakes of Connecticut.  Many of these 
> >summer homes were very small and sparse, no heat not running water, 
> >from the 1920's and up in time.  Electricity was a luxury and they 
> >did have 15 Amp services.
>
> That's exactly what we need - a four-wire meter (120V in, neutral in,
> 120V out, neutral out) at anywhere from 15 to 60 amps.  And I've seen
> one that looked like it had three wires (in out and neutral), but I never
> saw it in operation.
>
> >Maybe a local electrician around your area may have run into 
> >something similar out where you are?
>
> This request came in saturday morning, I spent all day
> saturday on a deployment, and not many electricians
> are in their offices / shops on a sunday...  I'll ask around
> during the week.
>
> >73, Joe, K1ike
>
> Mike WA6ILQ
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] Re: Radio for repeater use Response to Tom'scomments

[Thomas Oliver]

My thoughts exactly!  He should be losing around %35 through a six cavity
duplexer, my 4 can duplexer loses %29.

Tom, do you have a toggle switch in the PTT line and a local speaker you
can listen to the received signal with?  This is a must on repeaters to be
able to listen to a noisy signal and be able to turn off the transmitter to
check for a difference in signal quality.

You could also disable the transmitter and hook your mobile radio in its
place and transmit while another user is transmitting on the input to see
if the noise is still there.

I changed  to a hotter receiver one time that was almost totally  un usable
due to being noise even on a strong local signal. The problem was traced to
the transmitter seeing reflected power looking into the duplexer.  I added
short jumpers until the reflected power went away then made up a new jumper
with that new length.
It made all the difference in the world to the new receiver.  The old
receiver did not mind at all the extra noise that was being generated due
to reflected power.

G-7's are decent repeater antennas but they tend to pick up static
especially during thunderstorms. I started out with one on a water tower
and did not have much problem with performance except during thunderstorms
- there would be so much static even on a very strong signal that it was
almost totally un useable. 

My G-7 was tuned to have absolutely no reflected power at my TX Freq. and
joints were double hose clamped and gooped with silicone so as to keep the
moisture and corrosion out.  It worked for several years until it was blown
away by a direct lightning strike. all that was left of the vertical part
was the one inch wire from the center of the N connector.

Good luck on your project.




> [Original Message]
> From: Eric Lemmon 
> To: 
> Date: 10/5/2009 11:16:12 PM
> Subject: RE: [Repeater-Builder] Re: Radio for repeater use Response to
Tom'scomments
>
> Tom,
>
> You mentioned in an earlier posting that you had a six-cavity duplexer.
> Most six-cavity duplexers will have an insertion loss of about 2.25 dB,
> which means that with 70 watts in, you should see about 42 watts out.  If
> you actually were measuring 45 watts out with 55 watts in, your duplexer
has
> an insertion loss of only 0.9 dB.  If your measurements are accurate, the
> duplexer tuning seems to be way off.  What make and model duplexer is it?
> What instrument are you using to measure RF power?
>
> 73, Eric Lemmon WB6FLY
>  
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of W3ML
> Sent: Monday, October 05, 2009 7:54 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Radio for repeater use Response to Tom's
> comments
>
>   
>
> Thanks Tom,
>
> Yes, the advice is all good and I have tried several of the suggestions
and
> most, if not all, did help some.
>
> Tomorrow, I will turn it up to 70 watts out, which should give me 60 out
of
> the duplexer, if it works like it does not at 55 and 45 out.
>
> Then we will see what happens.
>
> In fact I did hook it up to another antenna on an adjacent tower. It
worked
> worse than the G7.
>
> Funny thing is when I hook the G7 to a regular 2 meter radio and transmit
on
> simplex, it works really well, hearing stations far a way and putting out
a
> solid signal.
>
> 73
> John
>
> --- In Repeater-Builder@yahoogroups.com
>  , Tom Parker  wrote:
> >
> > Well then, that's what everyone on this group is here for. All you have 
> > to do is ask, and you've done that. All the advice tonight is valid, so 
> > now you need to make some measurements. You definitely need an iso-tee, 
> > and good watt meter, i.e., Bird or Telewave, and a service monitor with 
> > at least a spectrum analyser would be a good start. Read the RB page 
> > and follow the suggestions. We actually had a couple of Mastr II 
> > mobiles rigged as repeaters, but we didn't de-rate the PA's. They saw 
> > heavy use with zero problems for over ten years before we replaced them 
> > with stations. Of course the tower building was a constant 74oF in the 
> > Texas sun and the A/C ran most of the winter. It's a shame there's not 
> > another antenna on the tower you could "borrow" for a few minutes.
> > 
> > thp
> > 
> > W3ML wrote:
> > 
> > > 
> > >
> > > Thanks Tom,
> > >
> > > Getting help around here is the hard part. I am the most experience 
> > > and that is mostly from book reading and now a little playing around 
> > > with the radio. No one else knows anything about repeaters either.
> > >
> > > We are just now getting into the repeater stage for our club.
> > >
> > > 73
> > > John
> > >
> > > --- In Repeater-Builder@yahoogroups.com
>   
> > > , Tom Parker  wrote:
> > > >
> > > > Mastr II is a good radio. Likely not much wrong with it. They're a
> > > > great deal better th

RE: [Repeater-Builder] Antenna question

[Thomas Oliver]

Buy a commercial one and cry once. 

Failing to have the funds you may want to build a colinear out of coax
sections.  It don't get much cheaper than that. 

http://www.repeater-builder.com/antenna/wa6svt.html


tom




> [Original Message]
> From: W3ML 
> To: 
> Date: 10/11/2009 10:09:31 AM
> Subject: [Repeater-Builder] Antenna question
>
> Hi again,
>
> We are looking to replace that used antenna after getting 100 feet of new
Andrews 1/2" donated to our club.
>
> Now I realize that the DB type antenna is the best, but we do not have
800 bucks to buy one.
>
> So, my question is should we just get a new G7-144 to replace the used G7
or is there another type of vertical that we could get that would be good.
>
> Being in North Indiana, our winters can be quite brutal, so we would
probably want something durable.
>
> Any suggestions.
> 73
> John, W3ML
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] OT: Our very own Mike Morris in this month's QST!

[Thomas Oliver]

Good one!


tom


- Original Message - 
From: 
To: Repeater-Builder@yahoogroups.com
Sent: 10/22/2009 10:12:12 PM 
Subject: Re: [Repeater-Builder] OT: Our very own Mike Morris in this month's 
QST!





>I was looking for a picture of Mike, not a picture of a car that Mike took.

Mike's a car thief?!?

73,
Bob, WA9FBO

Re: [Repeater-Builder] LDG Voter RVS-8 Mystery

[Thomas Oliver]

I would first try bypassing the voter and hook the link receiver
directly to the 850 to make sure levels are good. There should be no
reason you have low audio out of the controller the 850 normally has
gobs of audio and has to be knocked down with a resistor of considerable
ohmage in order not to overdrive a transmitter.

As someone else stated the oscilloscope is your friend here. Note the
levels on the input and output of the controller with the scope when it
is working properly then put the voter back in and compare.

tom

Re: [Repeater-Builder] Antenna Pattern Question

[Thomas Oliver]

I have DB 664 (VHF) clamped directly to a tower leg with all elements 
facing one direction and it works nearly as well off the back side range 
wise.

I think you will have to go with a real corner reflector to knock it 
down any noticeable amount.  Experiment away and let us know your findings.

tom

Dan Hancock wrote:
>
>
> I have a repeater that I need to have as tight a cardiod pattern as 
> possible. I have looked at the dipole antennas such as the DB-411 and 
> they don't really shut down the back door quite enough.
> Does anyone have any antenna modeling software that would show the 
> result of adding an 18" wide screen to the back side of the mast on 
> the DB-411? Does anyone have any experience in home-brewing a 
> modification like this?
>
> Dan Hancock N8DJP
>
>
>
>
> 
> 
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.5.425 / Virus Database: 270.14.73/2513 - Release Date: 11/19/09 
> 07:51:00
>
>   

Re: [Repeater-Builder] RE: 50 Watt Repeater

[Thomas Oliver]

Either way you are going to hear a squelch crash. If you turn reverse 
burst on, your transmitter will stay keyed slightly longer while it is 
transmitting the out of phase pl signal that makes a compatible receiver 
instantly mute. The Kenwood repeater receiver is not compatible (so it 
seems). 

There  is about three possibilities I can think of to rid your system of 
squelch crash. None of  witch are real easy to accomplish.

Easiest of all would be to make the users pl pass through the repeater. 
Would still hear squelch crashes if your mobile radios mic was off hook 
or your portables were not set to decode pl.


1)   install an audio delay board between the controller and receiver 
audio input. But that would only eliminate the squelch tail while users 
were talking (as long as the repeater transmitter remains keyed) You are 
always going to hear a squelch crash when the repeater transmitter 
unkeys unless you can figure a way to transmit pl tone only when there 
is cos and make the hang time  slightly longer than the time it takes 
your Motorola receivers to mute.

2) Install a community repeater tone panel  (repeater controller) 
capable compatible with Motorola reverse burst on both transmit and 
receive. Would require disabling the repeaters internal controller. 
Probably the best way.

3) install a pl decoder (like a TS-64 from Comm Spec) on the repeater 
receiver and transmitter each compatible with Motorola reverse burst. I 
do not know for sure if the TS-64 is motorola compatible.   Would 
require bypass of the repeaters internal decoder and interfacing the 
encoder and decoder to the proper place in the transmitter and controller.





There may be other ways that I have not thought of, anyone else?

tom



Peter Dakota Summerhawk wrote:
>
>
> Eric,
>
> So what settings should you have for the Motorola radios to avoid the 
> squelch tail in the system? Reverse burst turned on or off?
>
> Thanks
>
>  
>
> Peter Summerhawk
>
>  
>
> *From:* Repeater-Builder@yahoogroups.com 
> [mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Eric Lemmon
> *Sent:* Friday, December 11, 2009 10:22 PM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* RE: [Repeater-Builder] RE: 50 Watt Repeater
>
>  
>
>  
>
> Paul,
>
> You have put your finger on the major difference between modern 
> Motorola and
> Kenwood radios. Kenwood chose to equip their products to process only the
> 180-degree phase shift reverse-burst squelch tail elimination scheme, 
> while
> Motorola Professional Series radios can be programmed for either 
> 180-degree
> or 120-degree phase shift. TIA-603-C, the international standard for
> land-mobile radio performance, recognizes both reverse schemes as equally
> viable. Kenwood may recapture some market share, once their radios are
> equipped to encode and decode reverse burst in either scheme.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com 
> 
> [mailto:Repeater-Builder@yahoogroups.com 
> ] On Behalf Of Paul Dumdie
> Sent: Friday, December 11, 2009 8:12 PM
> To: Repeater-Builder@yahoogroups.com 
> 
> Subject: [Repeater-Builder] RE: 50 Watt Repeater
>
> I have a TKR-750 repeater and like it. My only issue is that I use 
> Motorola
> Portables and keep getting a squelch crash. What have you guys setting the
> setting for the reverse burst at to get rid of the squelch crash?
>
> Thanks!
>
> Paul R. Dumdie Jr. "73"
> W9DWP/R IRLP-NODE-4455
> 443.025/2A 145.270/1B/1Z/NAC-293
> ARC-Radio-8 KCARES KCAPS
> HERD546 EX WB9QWZ
> WQGG738-462.725 AAR5CU/T
> www.riflesandradios.com
> www.theherd.com
>
>
>
> 

Re: [Repeater-Builder] Programming Moto X9000 on a P1

[Thomas Oliver]

When you first turn the computer on it will usualy say something like 
press F5 for boot screen,  do it and go in and see if there is a setting 
for slower processor speed.
Select slow speed and also disable the cache . 

I have to do these two steps with my Toshiba Satalite  and it works fine 
on my x9000.  Moslo  never worked for me. (long time ago)

tom


Mike/W5JR wrote:
> Oh, great wizards. I have an aging, fragile 386sx laptop that has faithfully 
> programmed my X9000 radio for years. I also have a Compaq LTE P1 120 that I 
> program all of my other Moto radios with successfully except for the X9000. 
> On the Compaq, I have tried booting to real DOS6.22 from a floppy (Windows 
> 98SE DOS gives same problem). Using moslo, the X9000 program launches just 
> fine but I am unable to read the radio. I receive the dreaded "Serial Bus 
> Failure. Power Fault." message.
>
> I can only guess that the computer speed still hoses the serial port despite 
> using moslo to dial back the computer. I have read through all of the 
> repeater-builder and Blenderman sites on the issue. 
>
> Has anyone made the X9000 program work on a P1?  If not, I guess I'm going 
> garage sale shopping. 
>
> Thanks  
>
> Mike/W5JR
>
>
>   
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] FS: *NEW* UHF Motorola Micor repeater on Ham band

[Thomas Oliver]

It is DES capable meaning you can transmit encrypted communications 
through it. It does not encrypt transmissions it only passes what it 
hears. I believe that is the way it works. Should be easily converted 
back to standard Micor.

tom



wd8chl wrote:
> Skip wrote:
>   
>> WD6AWP just found this on ebay... it's not my auction and
>> I know nothing about it other that what the auction shows.
>> It's just too amazing not to share.
>>
>> The auction is for an SP version of the UHF micor repeater which 
>> was apparently never put in service and was shipped from Motorola
>> crystalled up in the HAM band with manuals documenting the mods from
>> standard production.
>>
>> A bit steep, but still !
>> 
>
> I don't quite get the DES part...the DES they were using would not be 
> legal on the ham bands...maybe they needed that option so they could run 
> 9600 packet through it??? oh well, it's still interesting to see a 
> Motorola (or GE for that matter) come from the factory on the ham bands.
> Neat.
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] FS: *NEW* UHF Motorola Micor repeater on Ham band

[Thomas Oliver]

Eric I was just relaying what I was told (by a gov radio tech) about how 
the repeater handels encrypted communications. It just passes audio 
straight through be it encrypted or analog. That way someone at the 
repeater site can not eavesdrop on the secure communications going 
through the repeater. At least that is the way it was explained to me 
and that is how I  understood it.  The extra cards and such just handle 
keying functions and encoding I believe.

Eric Lemmon wrote:
> Tom,
>
> Judging from the modules that are in the unified chassis, it appears that
> the station is a standard DVP (Digital Voice Protection) repeater.  The SP71
> merely means that it was manufactured to operate in the 440-450 MHz band.
> All of the modules I would expect to be in a DVP station that can encode
> and/or decode encrypted signals are present, those being the Voice
> Protection, Code Detect, Code Processor, 4F DVP Control, and the F2 DVP
> Control modules.  The Line Interface, Squelch Gate, and Timeout Timer
> modules would normally be installed in the three vacant slots, left to
> right. 
>
> I have several VHF DVP Micor repeaters that were removed from US Government
> service in the 138 MHz band, and am quite familiar with their operation.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Thomas Oliver
> Sent: Friday, January 08, 2010 8:28 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] FS: *NEW* UHF Motorola Micor repeater on Ham
> band
>
>   
>
> It is DES capable meaning you can transmit encrypted communications 
> through it. It does not encrypt transmissions it only passes what it 
> hears. I believe that is the way it works. Should be easily converted 
> back to standard Micor.
>
> tom
>
> wd8chl wrote:
>   
>> Skip wrote:
>>
>> 
>>> WD6AWP just found this on ebay... it's not my auction and
>>> I know nothing about it other that what the auction shows.
>>> It's just too amazing not to share.
>>>
>>> The auction is for an SP version of the UHF micor repeater which 
>>> was apparently never put in service and was shipped from Motorola
>>> crystalled up in the HAM band with manuals documenting the mods from
>>> standard production.
>>>
>>> A bit steep, but still !
>>>
>>>   
>> I don't quite get the DES part...the DES they were using would not be 
>> legal on the ham bands...maybe they needed that option so they could run 
>> 9600 packet through it??? oh well, it's still interesting to see a 
>> Motorola (or GE for that matter) come from the factory on the ham bands.
>> Neat.
>> 
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Re: Was Repeater Battery Question

[Thomas Oliver]

skipp, can you recommend a good low voltage disconnect?

tom

skipp025 wrote:
> Do you have a low voltage disconnect on the system? 
>
> s. 
>
>   
>> "rrath"  wrote:
>>
>> I would like to thank all of you that 
>> replied. I asked the question because 
>> I thought the batteries they were bad. 
>> After removing from the site, I 
>> charged them both up and took them 
>> to two battery shop here in Yakima. 
>> The results were, they are still good. 
>> So now I need to track down why the 
>> system keeps going down. They are 
>> 5 years old, but the repeater get very 
>> little use; maybe two hrs per week 
>> during the winter and about 6 hrs per 
>> week during the summer. Thank you 
>> all.
>>
>> Rod kc7vqr
>>
>> 
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Re: Low Voltage Disconnect and Very Remote Site Operation

[Thomas Oliver]

Me too Chuck, I want the low voltage disconnect to protect the batteries 
and the various solar controllers mentioned have that feature and more.

 Look at this kit : http://www.cirkits.com/scc3/scc3specs.html

Around $40.00 looks like it will fit my requirements. I plan on feeding 
it with a power supply instead of solar panels. Right now I have a 
Samlex 20 amp switcher hooked directly to the batteries set to 13.2 
volts (works great). I would very much like to protect the batteries 
from over discharge.

tom

Chuck Kelsey wrote:
> The only thing I am doing is a battery backup on a repeater - no solar.
>
> Chuck
> WB2EDV
>
>
>
> - Original Message - 
> From: "kc8fwd" 
> To: 
> Sent: Monday, January 25, 2010 9:05 AM
> Subject: [Repeater-Builder] Re: Low Voltage Disconnect and Very Remote Site 
> Operation
>
>
>   
>> Chuck,
>> I want to solar power a Digi and was curious what all you use and what 
>> type of batteries.Thanks Mike KC8FWD
>>
>> --- In Repeater-Builder@yahoogroups.com, Chuck Kimball  wrote:
>> 
>>> The 100 to 200ma to hold the coil in on some of the older LVDs can be
>>> more than the entire load at some sites.
>>> I run several solar powered digipeater sites where the standby current
>>> is <50ma.
>>>
>>> Last summer I ran across the Samlex LVD's that are all solid state, and
>>> the load is only 4ma.
>>> http://www.samlex.com/pdf/products/batteryguard_en.pdf
>>>
>>> Tessco carries the 40A version for about $65 (Gold Price)  (Non
>>> stock/special order).
>>>
>>> I have had good luck with them so far.
>>>
>>> Chuck
>>> n0nhj
>>>
>>>   
>>
>>
>> 
>>
>>
>>
>> Yahoo! Groups Links
>>
>>
>>
>> 
>
>
> 
>
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.730 / Virus Database: 271.1.1/2643 - Release Date: 01/24/10 
> 14:33:00
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Re: Low Voltage Disconnect and Very Remote Site Operation

[Thomas Oliver]

(Sorry for hijacking the original thread.)  
http://www.solorb.com/elect/solarcirc/scc3/

I assume it disconnects the charging source at night. In my application 
I am going to replace the "PV" with "power supply"


Quote "When the PV voltage is greater than the battery voltage, IC4 
turns on and sends power to voltage regulator IC3"

What do you think?

tom

Chuck Kelsey wrote:
> I agree with the other poster - it has no low-voltage disconnect.
>
> Chuck
> WB2EDV
>
>   

Re: [Repeater-Builder] Re: Low Voltage Disconnect and Very Remote Site Operation

[Thomas Oliver]

Majdi S. Abbas wrote:
>
>   Sure, it disconnects the charging source.
>   
You are correct I totally spaced that fact.

tom
>   But the load is connected across the battery.
>
>   There is no provision to disconnect the load from the battery.
> Without this, you can still over-discharge and damage the cells.
>
>   As a rule, I am far more concerned with battery health, than
> disconnecting the bleeder resistor in the power supply from the battery.
>
>   73,
>
>   Majdi, N0RMZ
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Re: GLB ID Board

[Thomas Oliver]

A few years back I posted questions about the GLB ID board and somone 
was kind enough to post the manual in the files section here. Too bad it 
does not print out too well.

http://groups.yahoo.com/group/Repeater-Builder/files/GLB/

tom


skipp025 wrote:
>   
>> "WB2DSS"  wrote:
>> Hi Skipp,
>> I've been following this thread, and I believe I have 
>> an ID board here, SOMEPLACE!! If I can find it, do you 
>> want me to send it to you so you can see what it looks like?
>> I may have a manual and/or schematic, if I can locate that also.
>> Let me know.
>> Thanks,
>> 73, 
>> Rich
>> Rich Poczkalski  WB2DSS
>> wb2...@... 
>> *  
>> 
>  
> Hi Rich, 
>
> That would be wonderful... I'll email you direct...  The ID'er 
> is so straight forward these units could be easily simplified, 
> upgraded with some additional features and possibly turned into 
> a clone board. 
>
> Although this is sort of a lost in time circuit when compared to 
> new faster, better layouts using small stamp/pic processors (the 
> ID O'Matic being an excellent example) it's still a lot of fun to 
> build and program these things. 
>
> And to get 1970 through 1980 repeater circuit nostalgic I really 
> enjoyed building the Diode Matrix ID'er Kits offered up by 
> Hamtronics (probably the best working design), VHF-Engineering 
> (worked OK but was quirky) and Spectrum (haven't had my hands 
> on one "yet"). 
>
> Then we move on in time toward CSC, AutoCode and Racomm Prom 
> based units (anyone remember the Racomm Voice unit?). Hamtronics 
> offered up a stand-alone Eprom based ID unit, of which I think 
> I have one somewhere. 
>
> Now when not talking about all the available External Repeater 
> Controllers with obvious ID functions included... we have small 
> stand alone ID'ers like the very cost effective (and versatle) 
> ID O'Matic Units which make it difficult to ignore this fast 
> forward trend in electronics. 
>  
> But it's still fun to play with the old stuff... and many times 
> make it work pretty well. 
>
> thanks
> skipp 
>
>
>   
>> Hi Pete, 
>>
>> Why not... the ID'er looks pretty easy to construct if anyone ever 
>> wanted to build one from scratch (for fun and to use) we now have 
>> most of the required information. 
>>
>> The guys have been corresponding with me direct and they've 
>> sent the original ID chip to me for free reprogramming. I can 
>> probably do that part by hand.  I have received diagrams and 
>> some of the manual for the original GLB Unit (IDer).  I'll 
>> read the chip and send you the bin/hex file and the circuit 
>> information. Have a look and if it's worth it we can make up 
>> an IDer as possible project. 
>>
>> cheers, 
>> skipp
>>
>> 
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] RFS TDE-7780A

[Thomas Oliver]

If that is the former Celwave flat pack duplexer with 6 notch cavites 
then yes it will work, I have seen many repeaters built with them. I 
would run no more than 30 watts into them although they are rated for more.

I think you are going to make the MVP mad if it gets much use. I think a 
better platform would be an Exec II. same guts bigger heat sink.

If it is a 35 watt radio I would bypass the final transistor by moving 
the output to the stage before making it a 20 watt  radio for the Exec 
II or consider the stage before that making it a 5 watt radio for the MVP.

You are going to need a fan.

tom

Paul wrote:
> Okay guys,
> I am building a tactical, mobile UHF repeater out of a GE MVP and have been 
> looking for a duplexer for the package.  I have seen several of the RFS 
> TDE-7780A listed on epay.  Do these work reasonably well in the Ham band?  My 
> freqs are 445.800 - 440.800. I hope to have 15 to 20 watts out of the MVP 
> after conversion.
>
> Two last questions, what cable does the collective recommend for the antenna 
> feedline, between the duplexer and the antenna?
>
> Any recommendations for a antenna?
>
>
> The plan is to deploy this repeater when additional radio coverage is needed 
> by placing it on a mountain top or high structure.  It would be self 
> contained in an Ammo can or two.  
>
> Thanks for the input and guidance.
>
> Paul
> KI4ADT
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] conversion to pdf utility

[Thomas Oliver]

There is also a free program that works with Firefox called PDF Download 
that allows you to save web pages as PDF documents, works great.

tom



skipp025 wrote:
> re: conversion to pdf utility 
>
> One of the Group Members turned me on to this pdf conversion 
> utility (yes it's even free).  
>
> CutePDF Writer 
>
> "Create PDF documents on the fly — for Free!" 
>
> Acts like a printer...  when you go to print a document the 
> options will allow you to print a file to Cute PDF Writer and 
> ask you where you want it placed.  
>
> http://www.cutepdf.com/products/cutepdf/Writer.asp  
>
> They also provide the free converter (GPLGS8.15; 5.01 MB) 
>
> The program is (Ver. 2.8; 3.36 MB) 
>
> Download both files, install the converter first, then 
> Cute PDF Writer and enjoy.  Easy to use when you just want 
> to convert something to a pdf file/format. 
>
> cheers, 
> s. 
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   







Yahoo! Groups Links

<*> To visit your group on the web, go to:
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<*> To change settings online go to:
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<*> Your use of Yahoo! Groups is subject to:
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Re: [Repeater-Builder] Re: GE Voter Lamps Don't Work

[Thomas Oliver]

I wonder if you ran them at slightly lower voltage they would last much 
longer?

tom

wd8chl wrote:
> On 3/7/2010 5:44 PM, KE4ZDG wrote:
>   
>> I figured out out.  The local/remote switch on the back of the power supply 
>> was on local.  That disabled the 25V necessary to run the lights.  Also, 
>> turns out that all the fail lights' bulbs had blown.  All is working now.
>>
>> BTW, it's the old school gray voter w/ 6 cards.
>>
>> Jared
>> 
>
> Yeah, those bulbs are notorious for burning out on a regular basis. 
> Either get a stockpile, or it should be possible to convert them to LED's.
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Re: MSR2000 UHF exciter (update)

[Thomas Oliver]

Not knowing what the MSR filter looks like I wonder if you could kludge 
a Micor exciter filter in there somehow?

tom


kc7stw wrote:
> You are correct Eric.  Did put a pig tail on just to see what it would do.  
> 100 watts of spurs and other messy junk.  I was thinking of building a filter 
> that could go between the exciter and the PA. Not sure how that would work 
> out tho.
>
> Its looking like I have a UHF MSR2000 that is useless at this point.  Unless 
> I can find a low spit exciter in hopes that FL101 will tune up.  There is a 
> Moto rep in town.  Going to look into maybe getting a new filter that will 
> work, and replacing it.  Not to many options at this point.  
>
> --- In Repeater-Builder@yahoogroups.com, "Eric Lemmon"  wrote:
>   
>> Jason,
>>
>> You definitely should not bypass FL101, because it performs an important
>> function.  Although the service manual does not provide any information
>> about tuning FL101, the schematic diagram reveals that it contains four
>> helical resonators that do appear to have tuning slugs which act as variable
>> capacitors.  As you have noted, the stock tuning favors the 450-470 MHz band
>> for which the station is designed.  I have not done this myself, but perhaps
>> other readers can advise you on the means and method of adjusting FL101 to
>> pass a carrier near 440 MHz.  You will likely have to carefully remove the
>> filter cover in order to reach the slugs.
>>
>> 73, Eric Lemmon WB6FLY
>>  
>>
>> -Original Message-
>> From: Repeater-Builder@yahoogroups.com
>> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kc7stw
>> Sent: Tuesday, March 09, 2010 8:49 PM
>> To: Repeater-Builder@yahoogroups.com
>> Subject: [Repeater-Builder] MSR2000 UHF exciter (update)
>>
>>   
>>
>> Hello again.
>>
>> So after messing with the exciter. (last post on this topic the exciter only
>> put out .1 mw) 
>>
>> The exciter will put out, 300mw to the input of FL101. This is just a simple
>> tune up. But FL101 blocks the RF 'since it seems to be out of range'.
>>
>> Can the filter be re-build, changed, by passed, and a external filter used,
>> etc?
>>
>> Also, at this point. Anyone have a UHF exciter that will play nice at
>> 440.300 that they want to sell? or trade for a exciter that plays nice in
>> the upper 70cm range?
>>
>> Thanks
>> -Jason
>>
>> 
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] GLB CW ID'er EZ-Program Util.

[Thomas Oliver]

U Da Man!

tom

n2...@hvc.rr.com wrote:
> Here's a prg/Util. that will read or create BINary 2716 images for
> the GLB EEprom based CW ID'ers.. 
> http://home.roadrunner.com/~n2mci/exe/GLBIDEZP.EXE
>
> It supports 1-8 different MSG's and is written to later GLB2B spec.,
> but should work in any of the GLB series ID'ers..
>
> Any problems, please contact me direct..
>
> Also, I might create another prg. to the Hamtronics version too..
> (CW-ID2/COR-4)
>
> -Pete N2MCI
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Copper pipe rather than 2/0 copper wire

[Thomas Oliver]

Flat copper strap has less inductance (if it is flat and straight) as 
far as lightning is concerned. You will need a brazing alloy like this 
to join the sections of pipe. 
http://weldingsupply.securesites.com/cgi-bin/spider.pl?D620F1||1|700|


This will give  you a joint similar to cad welding, the alloy is 
actually stronger than the copper base metal.


And a torch hot enough to melt it. Air /Acytelyne /or oxy /Acytelyne.

If you could figure out how to split the pipe and roll it flat you would 
be better off.


tom
/

David Jordan wrote:



Softdrawn copper tubing comes in spools of 25-50-100ft.

 




*From:* Repeater-Builder@yahoogroups.com 
[mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Eric Lowell

*Sent:* Tuesday, March 16, 2010 12:10 PM
*To:* Repeater-Builder@yahoogroups.com
*Subject:* Re: [Repeater-Builder] Copper pipe rather than 2/0 copper wire

 

 

It will work, you just have to bond each 10' section to the next with 
something other than soft solder. Lightning will blow lead solder 
right out of a joint. Cadweld would probably be best.


 


GL, Eric
 


Eric Lowell
Eastern Maine Electronics Inc.
48 Loon Road
Wesley ME 04686
eme@starband.net
www.satnetmaine.com
207-210-7469

 

 




*From:* Jesse Lloyd 
*To:* Repeater-Builder@yahoogroups.com
*Sent:* Tue, March 16, 2010 11:41:43 AM
*Subject:* [Repeater-Builder] Copper pipe rather than 2/0 copper wire

 


Hey All,

I am thinking about lightening protection for a site and using 1/2
copper pipe runs rather than a heavy guage wire like 2/0. 1/2 copper
is about $2.20 a ft, while 2/0 is about $3/foot... and 2/0's diameter
is about 0.36 inches so bang for the buck 1/2 copper pipe seems the
way to go. I know skin effect plays a big role in lightening since
its mainly RF, what do you think about the idea?

Cheers,

Jesse

Y

 

Re: [Repeater-Builder] Repeater /Crossband Help

[Thomas Oliver]

Sounds like your channel element is "running all the time" You may need 
to force jumper your ptt to ground all the time and reconect your 
controllers ptt to the channel element select line so it only runs when 
it needs to.

Other than that about the only thing you could do is place an attenuator 
in line with your remote base receiver.

I am sure Scott can tell you how to do it the right way.

tom

ka9qjg1 wrote:
> Hello hope Everyone is doing well,  I  have ran into a little Problem and 
> thought I would get some  suggestions on how to resolve it 
> I have a Motorola Micor 224.40 repeater  built By Scott N3XCC , here on the 
> Repeater builder group; it has worked   great for over 3 Yrs. 
>
> I have a Few Hams in the area   who do not have 220 but the  know and would 
> like to talk to some of their friends who do  ,  So I took My Kenwood TM-631 
> Duel band  found a  Local 2 Meter Simplex that Myself and  a few others have 
> been using for over 20 Yrs .
> I turned the 220 Transmit down as low as I could get it which   is  2 Watts 
> That  goes into a Bird 100Watt  Dummy load .  The 2 Meter side I have set a 
> 10 watts and a 3 In muffing  Fan that runs while Transmitting   It runs nice 
> and Cool , 
>
> Everyone likes  it and it works fine Except that is has been keying up on the 
> 2 Meter side off and on  sometimes as long as 3 4 Min  Unfortunately I had 
> disabled the TOT And  on this Radio  you can only have a PL On one side  and 
> I need that on the 220 side .
>  
> What I think is going on is that the Micor 220 has a Very small signal on the 
> output always being transmitted. No big deal except for what I "am trying to 
> do and that will random bring up the 2 Meter Transmit. 
>
> This radio has the 6 In Pigtails coming out to a SO-239  I wrapped them with 
> Foil and Moved the Duel band radio  about  10 ft away from the Repeater  
> which is in a 4 ft Motorola case .  The link is being Id When the Repeater is 
> being used. 
>
> Any thoughts will be great appreciated, The hams using this really like it 
> that don't have 220 they can now use their 2 Meter Mobile and Ht . 
>
> Thanks Don 
>
> KA9QJG 
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Low Band Micor mobile not making power

[Thomas Oliver]

I would run it as is if it does not overheat and look for a Syntor X 
they are good to go on six for full power.


tom

wd8chl wrote:

On 3/18/2010 10:45 AM, Kevin Custer wrote:
  

tahrens301 wrote:


Hi all,

Working on a micor mobile to be used as a
repeater (only using the exciter/control board/PA).

Was going through it, and am only able to get
about 75 watts out of it with the exciter on 53.7.

The exciter is putting out 0.3 watts... a bit more
than most exciters I've seen, but they were high band.
  

I'd expect to only see 75 watts out of a 110 watt PA if you only have
300 mW of drive.  Low Band exciters usually have about 600 mW leaving
the exciter on frequencies within original specification, and it's
common to see 150 watts out of a Low Band PA.

Under drive can be a bad thing.  I'd look at it with a spectrum analyzer
and make sure it isn't spurious because of the 3 dB of under drive.  It
probably isn't, but I'd check it anyway...

Kevin



The other thing I would do is if you have the original tx channel 
element, or can get one that's in the right area, like around 47-49 MHz, 
put that in and tune it up there and see what you get, if you didn't do 
that when you first got it. If it makes spec, then it might be time for 
some mods or something.
I know someone who put a Micor mobile on 53.77. It never did make full 
power up there (it was good on the original freq., 47-ish), and was set 
to run at abt 50W I think. At that point, it was clean, and stayed cool 
with a fan.

53.7 is pretty high for one of those.






Yahoo! Groups Links




  

Re: [Repeater-Builder] Ctcss detection

[Thomas Oliver]

I am pretty sure decode speed is related to CTCSS frequency, the higher 
the tone frequency the faster it decodes because it takes so many cycles 
to trip the decoder so a 100 hz would trip twice as fast as a 50 hz 
signal because it would get the required number of cycles in half the time.


tom

Ian Wells wrote:



I am wondering if the tait t2000 or any other radio can decode before 
the squelch opens .i.e. It decodes seperately to the squelch
 
Thank You ,Ian Wells

Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au 
 
/---Original Message---/
 
/*From:*/ Kris Kirby 

/*Date:*/ 20/03/2010 7:30:27 PM
/*To:*/ Repeater-Builder@yahoogroups.com 


/*Subject:*/ Re: [Repeater-Builder] Ctcss detection
 
 


On Sat, 20 Mar 2010, kerincom wrote:
> Hi guys .A long time ago there was a series of post over the ctcss 
detection
> time and I am wondering if anyone can suggest which radios are the 
fastest

> on ctcss detection

From what I've been able to determine, unaided by equipment, the
Motorola Saber appears to enable the audio PA (speaker pops) at about
the same time whether on carrier, PL, or DPL squelch.

--
Kris Kirby, KE4AHR
Disinformation Analyst

 

Re: [Repeater-Builder] RF Fuses

[Thomas Oliver]

How about Making one out of an old polyphaser housing just remove the 
guts and solder in the pico fuse.

Should remain closer  to 50 ohms if than putting a couple of chasis 
mount connectors on a metal box..

tom


Mike Morris WA6ILQ wrote:
> An article on upgrading a piece of equipment with one of those connectors
> would be a real good idea for the test equipment page.
>
> And if anyone has a couple of photos of that Cushman
> accessory that would be good to add.
>
> In fact, I need one of those for my CE-5.
>
> Mike WA6ILQ
>
> At 07:39 PM 03/20/10, you wrote:
>   
>> If I remember correctly, Cushman had a box that went in front of
>> their communications monitors.
>> This was a small cast metal box with BNC connectors attached.
>> Inside was a small pigtail fuse between the connectors.
>> The fuse was rated at 1/32 Amp.
>>
>> 73
>> Glenn
>> WB4UIV
>>
>> At 06:36 PM 3/20/2010, you wrote:
>> 
>>> Any ideas where I can buy RF fuses, either the actual fuse element
>>> or the combination holder/fuse say in a BNC configuration, to
>>> portect the input of a spectrum analyzer or service monitor?
>>>
>>> Dave WB2FTX
>>>
>>>
>>>
>>> 
>>>
>>>
>>>
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>>   
>> 
>>
>>
>>
>> Yahoo! Groups Links
>>
>>
>>
>> 
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

Re: [Repeater-Builder] Motorola Syntor system 9000 X help?

[Thomas Oliver]

If the ebay page is still available why not post a link to it, it may 
help identify what you have.

Sounds like some extra stuff in your configuration.

Thee X9000 is quite possibly the last great mobile radio Motorola made.


tom



AARON LEWIS DINKIN wrote:
>
>
> Motorola Syntor system 9000 X help?

Re: [Repeater-Builder] Looking to buy Low band maratrac low and high split

[Thomas Oliver]

I have several drawer units, no accessories just the radio part. Clean 
working pulled from service.  These are on 48 MHZ.

Make offer.

tom



ag4uw wrote:
> Hey  I am looking for Maratrac low band radios low 29.7 mhz and high 50 mhz   
> Must be working and not junk.  Let me know what you have and what your 
> asking.Thanks Freddy   N4XW
>
>   Please e-mail me of the group @  ag...@yahoo.com
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>   

repeater-builder@yahoogroups.com

[Thomas Oliver]

Good one!

On 5/4/2010 11:00 AM, Paul Plack wrote:



Oh, the irony...If bandwidth is an issue for you, suggest not sending 
the same post twice! - 73, Paul, AE4KR

- Original Message -

*From:* dennuszabawa 
*To:* Repeater-Builder@yahoogroups.com

*Sent:* Tuesday, May 04, 2010 5:34 AM
*Subject:* [Repeater-Builder] @#&@*&$%*((!!

OK, now that I have your attention.

The two things that have driven me from Yahoo Groups are:

Hijacking Threads: IF you can't figure out how to start a thread
on a new topic, please, BACK AWAY FROM THE KEYBOARD!

Not Trimming Replies: What is the sense of a 110KB+ reply that is
90% repeated material. Again, IF you can't figure out how to trim
your reply, please, BACK AWAY FROM THE KEYBOARD!

Consider this to be an intervention.

Re: [Repeater-Builder] FS: Test Panel, Moto TEK-5C

[Thomas Oliver]

You might want to list witch radios the cables work with that come with 
the test set.

tom

On 5/14/2010 12:30 AM, Jim wrote:
> I have a decent condition Motorola radio test panel, TEK-5C for sale.
> Was perfect condition until I dropped the adapter onto one of the meter
> bezels...Asking $30.00 for test set. Anyone interested??  Location
> zip = 03103.  You pay packaging&  shipping.
> Motorola TEK-5C Test Set
> Mobile radio test set with adapter connector and cables. Used for
> two-way radio shop bench alignment and
> testing of Mobile Radios.
> Wt 28 lbs, Dimensions:  19.5 in W X 9 in D X 6.5 in H
>
> Contact off forum please.  Pic is available.
> Jim M
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] White Noise on Micor TX

[Thomas Oliver]

Has the noise been there all along?

It may be just the nature of the beast.

There is an article on the RB web site about modifying a mobile audio 
squelch board to work in a base/repeater station, one of the benifits to 
doing so is the better muting of audio from the receiver, this is 
because there are two shunt switches in the squelch chip and the mobile 
configuration uses both to mute the audio, in the  repeater/base station 
configuration one of the shunt switches is used for station control like 
cos and not as affective at totally muting the audio. As designed the 
repeaters with their internal controller never had much hang time so it 
wasn't as  noticeable.


tom


On 5/23/2010 12:10 AM, Tim - WD6AWP wrote:
> I have a small amount white noise on the TX of a Micor repeater. It is most 
> noticeable in the hang time but it's not coming from the controller. It's 
> still there with the controller completely removed and pressing PTT on the 
> station control card. It's more noticeable on some radios, perhaps radios 
> with higher audio frequency response.
>
> Anyone ever run into this before?
>
> Tim WD6AWP
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] White Noise on Micor TX

[Thomas Oliver]

Chuck, I did over look that part about being disconnected.

Is it present when you have a full quieting signal on the rx input?

He may still have an audio path feeding the tx. How about pulling the 
audio squelch board and trying the local ptt?

tom

On 5/23/2010 12:54 PM, Chuck Kelsey wrote:
> Tom,
>
> I believe he said that with the controller disconnected, and using local
> PTT, it still does it. That should take the receiver completely out of the
> equation, leaving only the exciter as the likely culprit.
>
> I'd suggested adding a resistor from ground to audio high on the exciter to
> see if that helps. It did for me on one Mastr II that I had. Might be
> something similar on his Micor. Certainly a very simple thing to try.
>
> Bob already asked about the PL board as that's another possible candidate,
> but was informed that there is a PL board installed already.
>
> Chuck
> WB2EDV
>
>
>
> - Original Message -
> From: "Thomas Oliver"
> To:
> Sent: Sunday, May 23, 2010 12:21 PM
> Subject: Re: [Repeater-Builder] White Noise on Micor TX
>
>
>
>> Has the noise been there all along?
>>
>> It may be just the nature of the beast.
>>
>> There is an article on the RB web site about modifying a mobile audio
>> squelch board to work in a base/repeater station, one of the benifits to
>> doing so is the better muting of audio from the receiver, this is
>> because there are two shunt switches in the squelch chip and the mobile
>> configuration uses both to mute the audio, in the  repeater/base station
>> configuration one of the shunt switches is used for station control like
>> cos and not as affective at totally muting the audio. As designed the
>> repeaters with their internal controller never had much hang time so it
>> wasn't as  noticeable.
>>
>>
>> tom
>>
>>
>> On 5/23/2010 12:10 AM, Tim - WD6AWP wrote:
>>  
>>> I have a small amount white noise on the TX of a Micor repeater. It is
>>> most noticeable in the hang time but it's not coming from the controller.
>>> It's still there with the controller completely removed and pressing PTT
>>> on the station control card. It's more noticeable on some radios, perhaps
>>> radios with higher audio frequency response.
>>>
>>> Anyone ever run into this before?
>>>
>>> Tim WD6AWP
>>>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] White Noise on Micor TX

[Thomas Oliver]

A resistor certainly would be easy enough to try. As would popping in a 
spare exciter if he has one.

tom

On 5/23/2010 3:01 PM, Chuck Kelsey wrote:
> He indicated that in repeat it was better (less white noise) with an
> incoming signal, then got worse on the tail. Then  he disconnected the
> controller and still had white noise with local PTT. To me that hints of the
> exciter not "liking" a high impedance input, or no load on the mic input.
> That's why I suggested trying to add some resistance across the mic high and
> low at the exciter.
>
> Chuck
>
> - Original Message -
> From: "Thomas Oliver"
> To:
> Sent: Sunday, May 23, 2010 2:49 PM
> Subject: Re: [Repeater-Builder] White Noise on Micor TX
>
>
>
>> Chuck, I did over look that part about being disconnected.
>>
>> Is it present when you have a full quieting signal on the rx input?
>>
>> He may still have an audio path feeding the tx. How about pulling the
>> audio squelch board and trying the local ptt?
>>
>> tom
>>
>>
>>  
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] Motorola Maxtrac for cw beacon

[Thomas Oliver]

I think the old SCOM 5k controllers had beacon mode.

If you want mo power you may consider a Syntor X, could probably run it 
at 150 watts.

Do a google search for beacon controller, brings up several.

http://www.ncdxf.org/beacon/beaconcontroller.html

tom



On 5/30/2010 10:19 AM, Steve wrote:
> Hi
> should be easy just use one of the cheap CW iders.3 connections
> ground, ptt and tx af in
>
> Steve
> - Original Message -
> From: "Gordon"
> To:
> Sent: Sunday, May 30, 2010 2:53 PM
> Subject: Re: [Repeater-Builder] Motorola Maxtrac for cw beacon
>
>
>
>> Sorry for the confusion, must have had repeater on the brain. I did not
>> mean repeater. I would like to
>> setup a beacon on the lower part of 6 meters around 50.060 cw only.
>>
>> Thanks,
>>
>> Gordon N4LR
>>
>>
>> Mike Morris wrote:
>>  
>>>
>>>
>>> At 01:46 PM 05/28/10, you wrote:
>>>
 Is it possible to mod a maxtrac for cw operation for a ham 6 meter
 repeater. If not maxtrac what about other Motorola or GE Radios.

 Gordon N4LR
  
>>> I'm not understanding something.
>>>
>>> The subject line says CW beacon, the body
>>> of your message refers to CW operation
>>> and a repeater. Last I knew, most repeaters
>>> do voice...
>>>
>>> Can you clarify?
>>>
>>> Mike WA6ILQ
>>>
>>>
>>
>> 
>>
>>
>>
>> Yahoo! Groups Links
>>
>>
>>
>>  
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] Astron switching supply for Battery Charger??

[Thomas Oliver]

I have been using a Samlex 20 amp switcher to float charge 4 six volt 
golf car batteries wired in series parallel for the last 5 years,

The repeater and packet device are both Syntor X radios and have not 
been off the air in over 4 years.

I keep the voltage set at 13.2 with the power supply wired direct to the 
batteries (through a fuse of course) but find no reason to place a diode 
in series as the supply must be already protected from back current flow.

I picked 13.2 volts because  electrolite loss is minimal at that 
voltage, it may not be the optimum setup but it works for me.

I still need to figure out how to equilizie the batteries easily with 
this set up.

tom

On 5/31/2010 10:31 AM, ab6li wrote:
> Hello to the group.
>
> Has anyone used an Astron SS series switching supply for a battery float 
> charger? I have seen the info on using the standard Astrons but I like the 
> efficiency of the switcher.
>
> Any comments?
>
> Thanks in advance. John   ab6li
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] Re: GE MASTR Professional Equipment

[Thomas Oliver]

I have a bunch of new tubes for the vhf and low band Mastr Pro's if 
anyone needs some.

tom


On 6/16/2010 2:08 PM, kb1we6r wrote:
>
>
> To ALL; If you have never tuned one of these receivers up, you should get one 
> and DO IT! Tweaking the helical front end is amazing! It's so intuitive and 
> something that will be LOST forever in the digital age. They won't be around 
> forever. I even have a VHF MastrPro mobile NEW IN THE BOX!! I scrapped lots 
> of the tube transmitters and mobile power supplies,,, but I did KEEP the 
> receivers!... WE6R,-- Live Long and Prosper.
>
> --- In Repeater-Builder@yahoogroups.com, "Fred Seamans"  wrote:
>
>> To All: I am going to get completely away from MASTR Pro equipment. If
>> anybody wants anything, contact me off net and I'll see if I have it. Cost
>> very cheep plus shipping. Anything not gone in three weeks is going to the
>> trash.
>>
>> seaman...@...
>>
>> Fred  W5VAY
>>
>>  
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] Quantar Simulcast Issue

[Thomas Oliver]

Thanks Kevin, Now I know the reason for the offset.

tom

On 6/24/2010 4:58 PM, Kevin Custer wrote:
> Jeff DePolo wrote:
>
>> To get the RF phase accuracy you're implying that is required would mean
>> that everything in the RF path would have to guarantee that phase
>> relationship.  That means the same length RF interconnect cables inside the
>> cabinet, same RF feedline length (or full-wavelength multiples thereof),
>> same antenna type, etc.  Even if you could guarantee that kind of accuracy
>> at the time of installation, thermal effects would quickly throw it way off
>> (cables expanding/contracting with temperature for example).  Not to mention
>> the propagation delay will vary a whole lot with temperature, humidity, etc.
>> Just not gotta happen
>>  
>
> And in practice, we know it isn't going to happen, so we purposely set
> the frequency difference between transmitters that overlap in coverage
> to about 20 Hz.  This negates most negative effects of two transmitters
> being real close but not dead on frequency or angle.
> Transmitters that are very close to one another will cause PL tone
> decoders in the users radio to not reliably open, not to mention to
> weird audio artifacts that are produced/heard.  At 20 Hertz, or so,
> CTCSS tone decoders work fine and radios' speakers don't emit a horrible
> beat note.
>
> Kevin
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Re: [Repeater-Builder] carrier operated relay

[Thomas Oliver]

Here is one I use for radios that have an active hi cos signal, about as 
simple as it gets.

tom


On 7/6/2010 8:42 PM, Chuck Kelsey wrote:
> This one's on the Repeater Builder site:
>
> http://www.repeater-builder.com/projects/hangtimer.html
>
> Chuck
> WB2EDV
>
>
>
> - Original Message -
> From:
> To:
> Sent: Tuesday, July 06, 2010 8:36 PM
> Subject: Re: [Repeater-Builder] carrier operated relay
>
>
>
>>> Can anybody help me to make a makeshift repeater,
>>> I need a schematic diagram for carrier operated relay
>>> or "COR" for two radio transceivers to be converted
>>> into a repeater.
>>>
>>
>>  
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

<>

Re: [Repeater-Builder] Desoldering MSR2000 RX PCB

[Thomas Oliver]

For de-soldering I use a de-solder iron with a squeeze bulb on it from 
Radio Shack, works great.

http://www.radioshack.com/product/index.jsp?productId=2062731

tom

On 8/3/2010 1:17 AM, Eric Grabowski wrote:
> A recent thread discussed a problem disassembling a MSR2000 continuous duty 
> PA. That triggers this query: Does anyone know if Motorola used a higher 
> temperature solder on the MSR2000 units?
>
> My reason for asking is that this past weekend I had a hard time removing 
> three leaky electrolytic capacitors from a MSR2000 VHF receiver board. I 
> ended up using a 45 watt soldering pencil, which I only use for stubborn 
> jobs, but even it had a very hard time melting the solder on the positive 
> leads and didn't do anything for the leads soldered to ground. I've never 
> experienced this before on a PCB. In fact the 45 watt pencil usually works 
> well on double-sided PCBs with small to moderate groundplanes, although I'll 
> be the first to admit that it doesn't have enough heat to handle really 
> massive groundplanes found on some industrial PCBs.
>
> I've replaced components on many a Micor and Mitrek mobile using my 15 and 20 
> watt soldering pencils without a problem, so this experience came as a 
> complete surprise. Any thoughts?
>
> 73 and aloha, Eric KH6CQ
>
>
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

[Repeater-Builder] Need low power PA mod help for VHF MVP

[Thomas Oliver]

I am in need of a 2-5 watt range amp to drive an external amplifier, the 
stock VHF MVP amp is adjustable from 8-25 watts output,


I think by bypassing Q202 I will be close to my goal.  I need to know 
where to connect the coax to keep Q201 from getting mad.


I have done this on UHF MVP's before but the VHF amp is coupled 
differently between stages.


Schematic here: www.repeater-builder.com/ge/lbi-library/lbi-30143a.pdf


tom

Re: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek?

[Thomas Oliver]

 Get a Syntor X , programmable and will run 100 watts plus.

tom

On 8/29/2010 1:15 PM, Jeff KP3FT wrote:



Thanks guys.  Looks like this radio might work; need something for a 
6-meter beacon transmitter.  Tried a Mocom but it wasn't functional.  
Tried a Maxtrac but the carrier was really squirrely even when I tried 
the various mods, must be due to the PLL instead of crystal-control.  
Have to see how the carrier sounds on the Mitrek; if it's good I'll 
have one of the TX channel elements re-crystalled.  Been trying to get 
something for  a 6-meter beacon that doesn't cost a fortune, on and 
off for the past few years between other projects, and finding it a 
lot more difficult than it was finding a suitable 10-meter beacon 
transmitter!  Learning a lot in the process though, that's a good thing...

73
Jeff KP3FT

--- On *Sun, 8/29/10, Eric Lemmon //* wrote:


From: Eric Lemmon 
Subject: RE: [Repeater-Builder] dumb question: what is purpose of
lock on Mitrek?
To: Repeater-Builder@yahoogroups.com
Date: Sunday, August 29, 2010, 12:56 PM

Jeff,

The reason that most trunk-mount radios are locked is to prevent
theft and
tampering. The lock has no electrical function. You will need the
ubiquitous #2135 key to unlock your Mitrek drawer. You definitely
want to
open up the radio before applying power to it, so that you can
ascertain if
the channel elements are in place, and what optional components are
installed. Since Motorola shipped two keys with every radio sold, most
radio shops will have a drawer full of #2135 keys. If you ask, you
will
likely get one or two free.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com

[mailto:Repeater-Builder@yahoogroups.com
] On Behalf Of
KP3FT
Sent: Sunday, August 29, 2010 9:09 AM
To: Repeater-Builder@yahoogroups.com

Subject: [Repeater-Builder] dumb question: what is purpose of lock on
Mitrek?

Hi,
I know it's a dumb question, but after scouring the internet for
info, I
find everything about locks and replacement keys for Motorolas and
other
radios, but I still don't know what locking the Mitrek actually
does. Does
it kill all power to the radio, or disable certain functions? I'm
asking
because I just acquired a low-band Mitrek that I need to power up
and verify
its working condition. It doesn't have a control head, so I need
to use the
front panel pins, but if the radio is locked, I may end up getting
nowhere
and still not know if it's either the radio that is bad, it is
locked out,
or I wired it wrong. This is the first Mitrek I've had. Thanks for
any help.
Jeff KP3FT

Re: [Repeater-Builder] Re: no power out of duplexer SOLVED with more questions - Thanks for the answers

[Thomas Oliver]

 I agree. The users would not even notice if you cut the power in half. 
One 2 meter repeater we took over was running on the 10 watt exciter 
with the amp bypassed for I don't know how long.  The caretaker before 
we got it bypassed the amp because of desense or intermod or self 
oscillation issues, we used to have some high powered VHF paging 
transmitters close by that were exactly 600 Khz apart and no circulator, 
We are now blessed because they moved to 900.


It was only when were replacing the functioning repeater we discovered 
the amp was bypassed, He never told anyone.


tom

On 9/7/2010 11:50 PM, Glenn (Butch) Kanvick wrote:



Hi John.
Sometimes you might not want to tel the others what you do to the 
repeater, then they cannot complain about any adjustments that you make.

Butch, KE7FEL/r

On Tue, Sep 7, 2010 at 4:12 PM, W3ML > wrote:


Thanks to everyone for their comments and answers about my questions.

I did turn it back so I am sure someone will say something. Once
when a ham said he could not hit it, I drove over and sat outside
his house with a 25 watt radio and brought it up with an S8 signal.
It seems when a repeater goes up anywhere, someone will complain
about something to do with it.

Thanks and 73
John, W3ML

RE: [Repeater-Builder] Re: Motorola TLD6612A amp repair

[Thomas Oliver]

If you need another whole amp or transmitter let me know, not interested in
taking a working one apart to rob the insulator.

tom


> [Original Message]
> From: skipp025 <[EMAIL PROTECTED]>
> To: 
> Date: 2/25/2008 12:08:05 PM
> Subject: [Repeater-Builder] Re: Motorola TLD6612A amp repair
>
> Hi John, 
>
> > "kf0m" <[EMAIL PROTECTED]> wrote:
> > I am working on repair of a TLD6612A  2 meter repeater amp 
> > that runs a pair of 8560AS tubes. 
>
> Should be quite the smokin' signal when you have the amplifeir 
> in line. 
>
> > It worked fine for a number of years and then suffered
> > what appeared to be lightning damage.
> > 
> > The insulator between the plate line and the plate tuning 
> > disc was arced through among other damage. It is a rectangular 
> > piece of clear material that looks like mica. 
>
> If it is a clearish but dark material it probably is mica. If 
> it's the thicker white insulating material it might be beryllium 
> oxide, which has danger warnings about breathing any dust from 
> the material when drilling or cutting into it. 
>
> > I tried adding some Teflon tape to cover up the puncture.
>
> Nope, ain't gonna work. 
>
> > When I fired up the amp today, It arced through again during 
> > the tune up process.  Anyone have suggestions for a replacement 
> > or have one in their junk box?
> > 
> > John Lock
> > kf0m at arrl.net
>
> Google mica sheet and or look at companies like McMaster Carr. You 
> can often find small sheets and parts at woodstove and appliance 
> repair places/stores. 
>
> www.antiquestoves.com is one place I found some mica sheeting
> available on line. 
>
> And of course I searched "mica sheet" on Ebay and hit 10 or so 
> supply sources right off the starting line. 
>
> cheers, 
> s. 
>
>
>
>
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition. 
> Version: 7.5.516 / Virus Database: 269.20.9/1292 - Release Date:
2/21/2008 4:09 PM

RE: [Repeater-Builder] need Mitrek

[Thomas Oliver]

May be hard to get one on that split. I know Canada used to use Micor's on
the low split, maybe some of our northern friends may know where some are.

Used to be a company named Spantek in Hamilton Ontario that had a bunch of
commercial radios on the low split for sale.

Have you thought about using a Syntor X. They work great on two meters and
can be had for the price of one or two crystals.

What do you need a receiver or transmitter or are you trying to do both in
the same box?


tom


> [Original Message]
> From: <[EMAIL PROTECTED]>
> To: 
> Date: 2/25/2008 11:20:47 PM
> Subject: [Repeater-Builder] need Maitre
>
>
> Dear List Members,
> I am working on a 2 meter repeater using a Maitre mobile. Well I need 
> to get one that works first. HA. The VHF high band high split will not 
> work down low enough. I need a low split VHF high band Maitre mobile. 
> Anything? Please let me know.
> Thanks, Collin
>
> 
> More new features than ever.  Check out the new AOL Mail ! - 
> http://webmail.aol.com
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVGAS Free Edition. 
> Version: 7.5.516 / Virus Database: 269.20.9/1292 - Release Date:
2/21/2008 4:09 PM

Re: [Repeater-Builder] need Mitrek

[Thomas Oliver]

Yes it is doable I have several on the air right now very little trouble
since installation just keep fans on them if using for TX. I have one
running 125 watts without a fan (low duty cycle repeater TX)  and a couple
on two meters that I helped put together for a club that see pretty high
duty cycle. They had a couple fan failures that made the Syntor X's mad.
But the nice thing about it is you just grab another one and swap the
EEPROM module and you are up and running again. 5 minutes tops.
RX will be pretty deaf without retuning but the TX plays with out
modification although if it is colder than 30 degrees ambient the TX may
not transmit without some optimization but for the most part you can take
any of the 150-174 units and use for transmit without doing anything other
than programming the EEPROM.

I think the Syntor X  and X-9000 was the last great mobile radio that
Motorola made.  Been downhill ever since.

tom


> [Original Message]
> From: <[EMAIL PROTECTED]>
> To: 
> Date: 2/26/2008 12:54:05 AM
> Subject: Re: [Repeater-Builder] need Mitrek
>
> Tom,
> Thanks for the reply. I was going to do TX and RX in the same box. But 
> now??? I can get the Mitrek RX to work but the TX is dead. I think it 
> is set up for too high of a frequency to be able to tune down to 
> 144mhz. There are about 16 caps which I could change to get the TX 
> changed to the low split. I may have to go that way. Please tell me 
> more about the Syntor. Is it doable for a repeater?
> Thanks, Collin
>
>
> -Original Message-
> From: Thomas Oliver <[EMAIL PROTECTED]>
> To: Repeater-Builder@yahoogroups.com
> Sent: Tue, 26 Feb 2008 12:46 am
> Subject: RE: [Repeater-Builder] need Mitrek
>
>
>
>
>
>
> May be hard to get one on that split. I know Canada used to use Micor's 
> on
> the low split, maybe some of our northern friends may know where some 
> are.
>
> Used to be a company named Spantek in Hamilton Ontario that had a bunch 
> of
> commercial radios on the low split for sale.
>
> Have you thought about using a Syntor X. They work great on two meters 
> and
> can be had for the price of one or two crystals.
>
> What do you need a receiver or transmitter or are you trying to do both 
> in
> the same box?
>
> tom
>
> > [Original Message]
> > From: <[EMAIL PROTECTED]>
> > To: 
> > Date: 2/25/2008 11:20:47 PM
> > Subject: [Repeater-Builder] need Maitre
> >
> >
> > Dear List Members,
> > I am working on a 2 meter repeater using a Maitre mobile. Well I need
> > to get one that works first. HA. The VHF high band high split will 
> not
> > work down low enough. I need a low split VHF high band Maitre mobile.
> > Anything? Please let me know.
> > Thanks, Collin
> >
> > __
> > More new features than ever. Check out the new AOL Mail ! -
> > http://webmail.aol.com
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> > --
> > No virus found in this incoming message.
> > Checked by AVGAS Free Edition.
> > Version: 7.5.516 / Virus Database: 269.20.9/1292 - Release Date:
> 2/21/2008 4:09 PM
>
>
>
>
>
> 
> More new features than ever.  Check out the new AOL Mail ! - 
> http://webmail.aol.com
>
>
>
>
>  
> Yahoo! Groups Links
>
>
>
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition. 
> Version: 7.5.516 / Virus Database: 269.20.9/1292 - Release Date:
2/21/2008 4:09 PM

RE: [Repeater-Builder] Re: 125 watt duplexed Mitrek?

[Thomas Oliver]

Whoa back up a minute  my whole reply was to answer a question about using
a  Syntor X for a repeater transmitter, no it can not be duplexed in the
same box nowhere did I indicate it could.
sorry for the confusion.

tom


> [Original Message]
> From: skipp025 <[EMAIL PROTECTED]>
> To: 
> Date: 2/26/2008 10:26:03 AM
> Subject: [Repeater-Builder] Re: 125 watt duplexed Mitrek?
>
> Let me get this straight... you're been able to get a single 
> Mitrek Mobile Radio to Duplex (repeater) operation at 125 
> watts without any receiver desense? 
>
> Seems to me there is serious potential for in-cabinet desense. 
> At anything but modest power levels, most people use two Mitreks 
> for one repeater (one tx and rx radio each function). 
>
> cheers, 
> s. 
>
> > "Thomas Oliver" <[EMAIL PROTECTED]> wrote:
> >
> > Yes it is doable I have several on the air right now very little trouble
> > since installation just keep fans on them if using for TX. I have one
> > running 125 watts without a fan (low duty cycle repeater TX)  and a
> couple
> > on two meters that I helped put together for a club that see pretty high
> > duty cycle. They had a couple fan failures that made the Syntor X's mad.
> > But the nice thing about it is you just grab another one and swap the
> > EEPROM module and you are up and running again. 5 minutes tops.
> > RX will be pretty deaf without retuning but the TX plays with out
> > modification although if it is colder than 30 degrees ambient the TX may
> > not transmit without some optimization but for the most part you can
> take
> > any of the 150-174 units and use for transmit without doing anything
> other
> > than programming the EEPROM.
> > 
> > I think the Syntor X  and X-9000 was the last great mobile radio that
> > Motorola made.  Been downhill ever since.
> > 
> > tom
> > 
> > 
> > > [Original Message]
> > > From: <[EMAIL PROTECTED]>
> > > To: 
> > > Date: 2/26/2008 12:54:05 AM
> > > Subject: Re: [Repeater-Builder] need Mitrek
> > >
> > > Tom,
> > > Thanks for the reply. I was going to do TX and RX in the same box.
> But 
> > > now??? I can get the Mitrek RX to work but the TX is dead. I think it 
> > > is set up for too high of a frequency to be able to tune down to 
> > > 144mhz. There are about 16 caps which I could change to get the TX 
> > > changed to the low split. I may have to go that way. Please tell me 
> > > more about the Syntor. Is it doable for a repeater?
> > > Thanks, Collin
> > >
> > >
> > > -Original Message-
> > > From: Thomas Oliver <[EMAIL PROTECTED]>
> > > To: Repeater-Builder@yahoogroups.com
> > > Sent: Tue, 26 Feb 2008 12:46 am
> > > Subject: RE: [Repeater-Builder] need Mitrek
> > >
> > >
> > >
> > >
> > >
> > >
> > > May be hard to get one on that split. I know Canada used to use
> Micor's 
> > > on
> > > the low split, maybe some of our northern friends may know where some 
> > > are.
> > >
> > > Used to be a company named Spantek in Hamilton Ontario that had a
> bunch 
> > > of
> > > commercial radios on the low split for sale.
> > >
> > > Have you thought about using a Syntor X. They work great on two
> meters 
> > > and
> > > can be had for the price of one or two crystals.
> > >
> > > What do you need a receiver or transmitter or are you trying to do
> both 
> > > in
> > > the same box?
> > >
> > > tom
> > >
> > > > [Original Message]
> > > > From: <[EMAIL PROTECTED]>
> > > > To: 
> > > > Date: 2/25/2008 11:20:47 PM
> > > > Subject: [Repeater-Builder] need Maitre
> > > >
> > > >
> > > > Dear List Members,
> > > > I am working on a 2 meter repeater using a Maitre mobile. Well I
> need
> > > > to get one that works first. HA. The VHF high band high split will 
> > > not
> > > > work down low enough. I need a low split VHF high band Maitre
> mobile.
> > > > Anything? Please let me know.
> > > > Thanks, Collin
> > > >
> > > > __
> > > > More new features than ever. Check out the new AOL Mail ! -
> > > > http://webmail.aol.com
> > > >
> > > >
> > > >
> > > >
> > > >
&