A can of decent contact cleaner spray sells for about $20-30 around
here. I've noticed that a lot of the cheaper sprays just sort of ooze
from the can...
I've heard tales of the T1500 filters developing noise problems a few
years between cleanings, so I made sure to polish/clean mine up well
The equation is for characteristic impedance which means a line of infinite
length or one that is terminated with a resistive load equalling the
impedance of the transmission line. An interesting note, twisted pair telco
lines are about 600 ohms at baseband levels but are 120 ohms at DSL
So after reading the writeup about how the R1 audio squelch works I
discovered that it, like the micor, adjusts the COR dropout time depending
on the received signal strength... I think I read that it adds 150 ms for
weak signals. I don't have any good documentation (other than schematics)
on how
Paul,
I like DB antennas also. Their duplexers are also excellent. Excellent
company.
I do like the DB224, and other exposed dipole antennas, for it performs very
well (the specs are real) and is flexible...one can adjust the pattern for what
one needs. Mine has its main lobe at 135 deg
Ron,
You may want to also look at the COMPROD line of antennas.
They are built like a tank and survive in mountin top locations.
A few repeater groups here in the Chicago area are using them.
COMPROD makes 1,2, and 4 loop antennas with spacing options.
You can get 1/4 3/8 and 1/2 wave spacong
Can someone point me in the direction of a copy of MastrUtl? Pretty
sure that the software needed to program a GE Master III (UHF), at
least that's what LBI-38540x calls for...
Thanks,
Dave
N0TRQ
From: Gary Schafer [EMAIL PROTECTED]
Date: 2007/09/02 Sun PM 09:07:18 CDT
To: Repeater-Builder@yahoogroups.com
Subject: RE: RE: RE: RE: RE: RE: RE: RE: Re: Re: RE: [Repeater-Builder] Re:
Duplexers
Isnât it interesting to note thatthe impedance goes UP at low frequencies
This could be correct in that say a 50 Ohm coax at 10 MHz would be say 120 Ohms
at 100 kHz or 90 Ohms at 50 kHz...freq dependent. There is still L and C.
However, this would have to be for a specific design or application.
It would affect wideband stuff like video and it does. I guess one
Gary,
I gave the reason for the statement...measured with HP piece of test equipment.
Was quick and to the point.
I did not think I had to dig into my libary and dig out the equations. Same
with stating an SWR...thought most would take a reading from a meter and not
having to give the
Paul,
The link you posted goes to a fairy-tale site. Here is Comprod's site:
www.comprodcom.com
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Paul R. Dumdie Jr
Sent: Sunday, September 02, 2007 7:36 AM
To:
I used to be in the clean everything back to new... camp. About
three years ago I was built some really High-Q tank circuits
for NMR Probe Research. The test equipment I have will clearly
show a relative circuit operational Q.
After a lot of construction and testing I could see that even
Flaky on the TX or RX side? Tone reeds do fail and get flaky.
In many cases you can actually swap the reeds to the other
location (regardless of what the labels might say). If the
problem moves to the other side function... you know the
reed needs to be replaced.
I've replaced lots of tone
Go back and re-read the original thread: this discussion has never been
about what one AGREES to... Bob made the claim that TASMA has control of
the technical standards for the repeaters it coordinates, and tried to cite
Part 97 to back up his claim:
At 9/1/2007 11:25, you wrote:
[EMAIL
One can see there becomes a point where the coax will not
look like coax at low frequencies or atleast have a
characteristic impedance of something other than it normal value.
Most of this is true (although I don't know what you mean by coax will not
look like coax), and I already
Hahaha a audiophiles... can sell them anything no need for real
physics, just tell them that this device will make things sound better, back
it up with a BS statment that doesn't apply, and charge them 100 bux.
On 9/3/07, Jeff DePolo [EMAIL PROTECTED] wrote:
One can see there
Re: [Repeater-Builder] MSR 2000 R1 Audio Squelch
Normal operation of the MSR-2000 Squelch circuits in repeater
operation works as follows.
The R1-Audio Module Squelch gates the receiver voice audio path
and provides a squelched or un-squelched logic source out to the
backplane for use by
My circa early 80's audio friend Rick collected a series of
audiophile articles about how braided strands of larger solid
enamel coated wire is better for audio. He set about installing
replacement hand-made cables on his stereo system and measuring
the results, which were actually better than
I've got a copy at work If I can remember right... I had to program a Mastr
II E wich I believe uses the same software as the III. I'll take a look.
On 9/2/07, dakaratcaptivereefing [EMAIL PROTECTED] wrote:
Can someone point me in the direction of a copy of MastrUtl? Pretty
sure that the
OK, your turn...
We have a Repeata-Mate RM-1 box here... anyone ever heard of
or seen one of these small boxes before? It has four screw
terminals on one side, a top mounted speaker, volume control,
Speaker push on-off button and a lamp.
The box top mounted cover label emblem has radio
I suppose without the oxygen, the copper wire won't
rust or develop that green patina, so the sound
quality won't degrade !
Also, due to skin effect at audio frequencies, the
more strands, the better.
And with some amplifiers that have a really high input
impedance, the lower capacitance cable
I have a few things to offer up:
One VHF quarter KW Micor base on 154. Free to good home.? Pickup only.
One VHF Lo light duty Micor base on 46. Free to good home. Pickup only
One BPR 2000 pager on 138 w/2tone decode. $5 shipped.
One UHF 100W UHF Micor repeater on 460. Free to good home.
In a message dated 9/3/2007 12:03:22 P.M. Pacific Daylight Time,
[EMAIL PROTECTED] writes:
I suppose without the oxygen, the copper wire won't
rust or develop that green patina, so the sound
quality won't degrade !
Also, due to skin effect at audio frequencies, the
more strands, the
Ron ,
Aw c'mon Ron, dig out those equations from your library so we can all see
where you're comming from. That way we can get an idea how much reference
materials you really have and who and what they are. And just because your name
is Wright doen't mean you're right all the time. Jesse also
My source was Electronic Communications Systems by Wayne Tomasi from
DeVry. Copyright 1998. Its my old collage text. Also I grabbed additional
information from google searches.
Jesse
On 9/3/07, allan crites [EMAIL PROTECTED] wrote:
Ron ,
Aw c'mon Ron, dig out those equations from your
Picked up a Motorola DC Multimeter at a hamfest. Very clean but it
needs batteries. Inside it says the large battery is a Burgess 4156.
No problem. But on the board there is a clip for another battery.
Anyone know what it is? It doesn't look like a clip that will hold
any battery I am
--- In Repeater-Builder@yahoogroups.com, skipp025 [EMAIL PROTECTED] wrote:
My circa early 80's audio friend Rick collected a series of
audiophile articles about how braided strands of larger solid
enamel coated wire is better for audio. He set about installing
replacement hand-made cables
S-1052 is the DC powered only model, S-1063 is the same, but also had a 110vac
input on the back.
Both used a Burgess 4156 (22 1/2 volt) and a Burgess 130 (1 1/2 volt) for
their batteries.
I had one for a long time, but got tired of the odd batteries.
Good meter, 1962 Motorola book lists
Hey guys,
How many amps (ish) does a Micor 110 Watt VHF PA take when operating?
Jesse
If you really need a good chuckle (unless you threw out your tube
stock recently) go to ebay and search for a 12ax7. For example
http://cgi.ebay.com/Matched-New-Pair-of-Rare-Philips-mC-12AX7-Tubes_W0QQitemZ330162061283QQihZ014QQcategoryZ50598QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I sure hope
The 22.5 volt battery is about the size of a standard 9 volt,
with bumps at each end (axial body connections at each end).
They'd be a special order item from the more popular electronic
part sources and since they're not super common anymore. On the
web they pop up cheap enough at $10.95
Ron, if you find out it takes a A (Single A) cell 3vdc Lithium, let me
know. I have 150 of them and no use for any of them. An A cell is just
a bit longer and slightly larger than an AA cell.
rwjohn49 wrote:
Picked up a Motorola DC Multimeter at a hamfest. Very clean but it
needs
Thanks.
On 9/3/07, skipp025 [EMAIL PROTECTED] wrote:
Just the PA without anything else
Anywhere from about 8 to 14 amps depending on the source
DC power supply, the specific install and who sets up the
equipment.
cheers,
s.
Jesse Lloyd [EMAIL PROTECTED] wrote:
Hey guys,
How
El gusto es mio...
If you use the amplifier on an external dc supply of the
Astron type... you should probably use no less than the 35 amp
rated unit and expect it to get really warm/hot in lock to
talk (long transmit) periods of operation. Enough so that a
modest ball bearing fan or blower
Jesse,
I find six titles by Tomasi with Electronic Communications systems in
them.Could you be a bit more specific? And could you specify the pages where
you found the information you used? And could you provide the information from
which google searches?
I'm interested in your sources.
Ya thats exactly what I was wondering, I think I'll pick up a 50 amp rack
mount astron.
On 9/3/07, skipp025 [EMAIL PROTECTED] wrote:
El gusto es mio...
If you use the amplifier on an external dc supply of the
Astron type... you should probably use no less than the 35 amp
rated unit and
Just the PA without anything else
Anywhere from about 8 to 14 amps depending on the source
DC power supply, the specific install and who sets up the
equipment.
cheers,
s.
Jesse Lloyd [EMAIL PROTECTED] wrote:
Hey guys,
How many amps (ish) does a Micor 110 Watt VHF PA take when
Sure I suppose... Electronic Communications Systems Fundamentals Through
Advanced - Fourth Edition. Page 319.
Also I went to microwave101.com for some more info.
Curious why your so interested in the sources, I'm not lying I swear!
Jesse
On 9/3/07, allan crites [EMAIL PROTECTED] wrote:
er www.microwaves101.com
On 9/3/07, Jesse Lloyd [EMAIL PROTECTED] wrote:
Sure I suppose... Electronic Communications Systems Fundamentals Through
Advanced - Fourth Edition. Page 319.
Also I went to microwave101.com for some more info.
Curious why your so interested in the sources, I'm not
I wonder why the seller claims to have Phillips tubes when the picture clearly
shows Rogers tubes ?
Rogers made tubes in Toronto for over 50 years. Ted Rogers Sr invented the
batteryless radio
when he developed tubes that would work with an AC filament.
His Ham call was 9RB and his radio
Jesse,
It has been my experience one needs a continous duty supply at 2 times the PA
output. This is the same for most Ham rigs as far as current draw.
So for 110 W need a 220 W supply or 220W/13.8V = 16 Amps.
If one takes some of the Motorola and GE PAs and turns down the power output
the
Whats going on is it seems like every once in awhile, after a few
kerchunks, it the machine starts feeding back on it self and the COR and
PL detect lines start pulsing simultaneously. I still have some more
troubleshooting to do, when I can get back to the site.
skipp025 wrote:
Flaky on
Allan,
Well I think most on here do not quote their sources for many got info long
time ago and from many sources.
If you want a list of some of what I got...well ok:
Reference Data for Radio Engineers, ITT (have had about 30 years so probably
should update, but still the RF stuff is pretty
I think most repeater coordinators don't ask what equipment one is running or
going to use. This is how it is in Florida anyway. Besides most coordinators
don't know much about the equipment being used.
I think they just follow their coordinating policy (distant to co-channel
repeater, height
John J. Riddell wrote:
*Ted Rogers Sr invented the batteryless radio*
*His Ham call was 9RB and his radio station later became CFRB...on
the air to-day ...still...1010 Khz*
*The RB part stands for Rogers Batteryless*
Ted was one of the original Repeater Builders, hence the real reason for
Maybe it was the one I threw away! It is of 1970's vintage. Don't waste
your time, it was a very frustrating thing to deal with and it left my
TX stuck on more than once. Nowadays the cross-band repeat feature of
dual-band rigs delivers a nice clean solution.
73
Nigel
ve3id
skipp025
Skip, when I lived in England 14 years ago, the audiophile discussions
were centred around whether CDs sounded better when they had been
stored overnight in the freezer. Now you wouldn't want to contradict
that, would you? After all I heard it on the BBC!
We banned audiophiles from our
To put a repeater connection back unto this thread, I would like to say
that Rogers-Majestic was the company that made the 41V in Toronto that I
got on 2m repeaters with, maybe one of Ted's sidelines that he later
sold to Motorola? Maybe those tubes were mobile communications quality!
73
And if I remember correctly that 22.5v battery is only used on
the highest ohms scale. If you can live without it the meter is
quite happy with an empty battery holder.
A friend of mine had a Tripplett 630 VOM that also needed a
22.5v battery. He cut a block of wood to fit the holder, put a
Hey All,
Looking for a microprocessor driven user programmable CTCSS
decoder/encoder something very simple and ideally cheap. Single
tone, and preferably something with minimal current draw.
Any good manufactures/ models that you would recommend?
Jesse
In a message dated 9/3/2007 6:30:07 P.M. Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Skip, when I lived in England 14 years ago, the audiophile discussions
were centred around whether CDs sounded better when they had been
stored overnight in the freezer. Now you wouldn't want to
Jesse,
I use this: http://www.com-spec.com/ts64.htm
$54.95 list. Available from Tessco, Hutton and other purveyors... ;-)
I have no pecuniary interest in Com-Spec, Tessco, Hutton, etc... just a
happy user.
Mark - N9WYS
-Original Message-
From: Repeater-Builder@yahoogroups.com On
Oh ya we've used these at work, a fellow tech had one wired into a package,
cool thx.
On 9/3/07, n9wys [EMAIL PROTECTED] wrote:
Jesse,
I use this: http://www.com-spec.com/ts64.htm
$54.95 list. Available from Tessco, Hutton and other purveyors... ;-)
I have no pecuniary interest in
Haha, nice. Another good one is the guys who have had entire boards changed
to silver solder because it sounds better... and argue with you to the
end of breath if you ever say it does nothing, and is a total waist of
time. Even the car audio guys are foolish sometimes. Running double ott
I was considering a similar project using packet.
Specifically, by
keeping a transceiver open on a out-of-band frequency.
Alternatively,
maybe use the same input frequency to monitor for
either a tone burst or
packet data for upgrade. If detected, have the
repeater switch into
packet
Don't bother with Tessco, Hutton, et al for Com-Spec products...
From the web page at
http://www.repeater-builder.com/com-spec/com-spec-index.html
Com-Spec will sell direct to the end user and can easily beat
Hutton's, Tessco's and most others prices.
Call 800-854-0547 or 714-998-3021 from
I was considering a similar project using packet.
Specifically, by
keeping a transceiver open on a out-of-band frequency.
Alternatively,
maybe use the same input frequency to monitor for
either a tone burst or
packet data for upgrade. If detected, have the
repeater switch into
packet
Well, there ya go, Jesse!!
_
From: Repeater-Builder@yahoogroups.com On Behalf Of Mike Morris
Don't bother with Tessco, Hutton, et al for Com-Spec products...
From the web page at
http://www.repeater-builder.com/com-spec/com-spec-index.html
Ya, in a nearby town the hams did that. We use link communications
controllers that have a serial port for programming on them. They hooked
them up to a TNC which allowed them to change programming remotely. Worked
great. Unfortunately it was before my time, and I wasn't involved in the
Generally that is true, but in WPA if a case of interference comes
about, and the repeater causing the interference is not meeeing the
Council's recommended specs on equipment, goess who is going to be
solving that interference or losing their coordination? (in which case
it will be their
1.2 GHz Enthusiasts -
I have an extra Icom IC-X2A/E in great condition that I'd like to sell. It has
two VFOs covers the 440 1.2 GHz bands simultaneously. It includes a BP-84
battery pack a cigarette lighter adaptor. The extended coverage mod has also
been made.
These HTs are rare sell
Sound familiar to a problem I've had in the past. Try to see
if the problem duplicates when the transmit power from the
PA is placed into a termination (dummy load). Don't forget
to properly terminate the unused duplexer port if you're not
on a combiner.
Might actually be an rf generated
On Sep 1, 2007, at 7:08 PM, Ron Wright wrote:
I've seen good fiberglass antennas last 20 or more years in harsh
enviroments and still show much life left.
Up here, above 10,000 MSL, the UV rays eat up the fiberglass and they
don't last any longer than 10 years, either. :-)
That is... if
On Sep 1, 2007, at 4:35 PM, [EMAIL PROTECTED] wrote:
We have control of the technical operating parameters; see Part
97.3 (a)(22).
As an example, we have one system on test coordination that has ~20
dB of
desense. It can't be used anywhere with an HT, even 5 miles away
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