Re: Re: [Repeater-Builder] Deviation

[hwstar]

I agree. DTMF is two sinusoids. You don't want the limiting action to distort 
the signal. BTW this is also why you should use 3KHz as a baseline on linked 
systems to keep the audio as linear as possible through chain-linked RF 
repeaters.

One thing that bugs me though is that the 2005 ARRL handbook says 5KHz RMS 
deviation (appx 7.07 KHz) for NBFM. I beleive this is wrong. I've always used 
peak-to-peak/2 setting on the HP8920 service monitor. 

Carson's rule states that channel bandwith is 2 times the sum of the peak 
deviation and highest modulating frequency. If you use 5 KHz RMS deviation with 
a 1KHz sinusoid, the channel bandwidth will be 2*((1.414*5000)+3000) = 
20.14KHz! 
This ain't 16K0F3E.

Steve
WA6ZFT


> 
> From: mch <[EMAIL PROTECTED]>
> Date: 2005/12/02 Fri PM 02:43:24 PST
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Deviation
> 
> TT should be between 3 and 4 kHz deviation. (preferably closer to 3)
> 
> Joe M.
> 
> Charles Greene wrote:
> > 
> > Ken,
> > 
> > Shouldn't the touch tone pad tone be set at the maximum deviation or
> > nearly so?  Those are steady and not subject to peaks.  Also I take
> > it the max deviation should be set  with a 1Khz audio tone applied>
> > 
> > 73,  Chas W1CG
> > 
> > At 05:05 PM 12/2/2005, you wrote:
> > >One thing that hasn't been mentioned so far, and one thing that is quite
> > >important, is that regardless of the suggestion of 5 or 4.75 Khz, it must
> > >be noted that these are PEAK values, not average.
> > >
> > >If the average deviation is set for 5 KHz, then the peaks will be
> > >absolutely be more than 5 Khz.
> > >
> > >So use the scope in the service monitor, not the meter
> > >
> > >Ken
> > >--
> > >President and CTO - Arcom Communications
> > >Makers of state-of-the-art repeater controllers and accessories.
> > >http://www.ah6le.net/arcom/index.html
> > >We offer complete Kenwood TKR repeater packages!
> > >We are now an authorized Telewave Dealer!
> > >AH6LE/R - IRLP Node 3000
> > >http://www.irlp.net
> > >
> > >
> > >
> > >
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > 
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> >
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 





 
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Re: [Repeater-Builder] WTB MITREK (UPPER UHF) T-64 or T-74

[hwstar]

Jeff,

The PA in the high power UHF Mitreks won't last very long in high duty cycle 
repeater service. The power dividers are a weak spot in the PA design.

The best Mitreks to use are the ones without power dividers. The T34 30W model 
is ideal as it can be run at 18-20W and don't require any additional cooling. 

The 50W T44 Mitreks run fine with additional forced air cooling at 30W.  I use 
a 12V 24CFM blower and a duct with a fan controller. 

Steve 
WA6ZFT






> 
> From: "Jeff" <[EMAIL PROTECTED]>
> Date: 2005/07/22 Fri PM 05:14:46 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] WTB MITREK (UPPER UHF) T-64 or T-74
> 
> I need three high power Mitrek UHF radios to convert to repeater use.
> 
> Jeff
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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Re: Re: [Repeater-Builder] USA Repeaters

[hwstar]

Steve,

We try to work with our coordinating bodies, but if that coordinating body is 
unresponsive, the repeater goes on the air and the interference issues are 
worked out using the FCC rule that "the uncoordinated repeater has the primary 
reponsibility for resolving the interference". One might have to change 
frequencies several times to resolve interference issues. 

Coordination bodies in the US are self-appointed and in areas such as Southern 
California some are closed membership organizations which only care about the 
interests of the existing coordinated repeaters.

I believe the RGSB coordination method might be superior as all amatuers are 
represented, and there can't be closed or private repeaters. Your method was 
probably bourne out of necessity since you don't have bands as big as ours on 
2M and 70cm.

It is not my intention to get into a flame war over repeater coordination as 
that is not what this list is meant for.


Steve Rodgers
WA6ZFT






> 
> From: "steve" <[EMAIL PROTECTED]>
> Date: 2005/06/20 Mon PM 07:02:18 EDT
> To: 
> Subject: Re: [Repeater-Builder] USA Repeaters
> 
> Thanks Chris
> sounds like the US hams, unless they do silly things, look
> after all the repeater stuff, so, correct me if Iam wrong, if a ham wants to 
> setup a repeater can he jst go ahead and do it.
> What sort of TX power restrictions are there, here it is very unusual for a 
> repeater to run more than 25w
> 
> 
> 73
> 
> Steve M1SWB
>   - Original Message - 
>   From: [EMAIL PROTECTED] 
>   To: Repeater-Builder@yahoogroups.com 
>   Sent: Monday, June 20, 2005 11:16 PM
>   Subject: Re: [Repeater-Builder] USA Repeaters
> 
> 
>   The FCC sets very general rules. There are voluntary frequency coordination 
> bodies in different areas that help keep things in order. The FCC does very 
> little enforcement anymore due to budget/policy issues. For the most part (In 
> my area) the hams keep things pretty much In good order operational wise. I 
> guess there are some areas of the country where things are out of hand but 
> the primary responsibility is on the repeater owner/trustee who's
>   callsign is on the system. The FCC does not issure repeater licenses 
> anymore, they are under the callsign or the owner or trustee.
> 
>   Chris
>   N9LLO
>   53.39Repeater
>   444.025 Repeater
>   927.4875 Repeater
> 
> 
> 
> 
> 
> 
> 
> 
> 
> --
>   Yahoo! Groups Links
> 
> a.. To visit your group on the web, go to:
> http://groups.yahoo.com/group/Repeater-Builder/
>   
> b.. To unsubscribe from this group, send an email to:
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> 
> 
> 
> 
> --
> 
> 
>   No virus found in this incoming message.
>   Checked by AVG Anti-Virus.
>   Version: 7.0.323 / Virus Database: 267.7.9/23 - Release Date: 20/06/05
> 
> 





 
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Re: [Repeater-Builder] Re: Caution on Bomar Crystals

[hwstar]

 

I beleive ICM will send you an order confirmation via snail mail, but it has 
been such a long time since I ordered from them I'm not sure if they still do.

You could fax your order to Bomar with no voice phone number
and request that they fax back a confirmation as a condition of sale. That way 
if they did screw up, it would be documented. 

Steve
WA6ZFT



> 
> From: "Coy Hilton" <[EMAIL PROTECTED]>
> Date: 2005/05/12 Thu PM 06:42:54 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Caution on Bomar Crystals
> 
> This past December I ordered 7 crystals from Bomar Crystal for 
> $70.00 + $10 shipping. When I received the crystals, one pair was 
> reversed Tx and Rx. When I called them on it, They said that it was 
> what I had ordered, and so graciously offored to re cut them for $10 
> each NO MINIMUM (WOW WEE)so I paid it. One of the other crystals for 
> a transmitter was Tango Uniform (DOA). I figure that Bomar has no 
> interest in customer loyalty, So I will be loyal to ICM whom has 
> always gottem my orders right first time.
> AC0Y  
> 
> --- In Repeater-Builder@yahoogroups.com, "Mark Boden" <[EMAIL PROTECTED]> 
> wrote:
> > FYI on orders to Bomar Crystal.
> > 
> > Just had a flustrating phone conversation with Bomar.  Ordered 3 
> > crystals at $10 each.  Came in at $20 each plus $10 shipping.
> > 
> > Asked why.  Was told it was billed wrong.  Offered to credit me 
> $2.50 
> > each as they made them on a 2 week basis (RUSH) and there is a $50 
> > minimum.  They were not sure who took order.  They said they 
> ALWAYS let 
> > everyone know about the minimum. I ordered them as a trial first 
> order 
> > on a non critical job.
> > 
> > Would not budge or change back to what I ordered. Would not allow 
> me to 
> > discuss with anyone else on this standard delivery phone order.  
> They 
> > did allow me to send them back for full credit.  
> > 
> > They suggested that I be careful in  ordering next time.  I think 
> I 
> > learned my lesson on this first order.  This is a disappointment.
> > 
> > Mark Boden - N4TZV
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 





 
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Re: Re: [Repeater-Builder] Caution on Bomar Crystals

[hwstar]

I stand corrected.

I just confirmed this by calling Bomar. Some TCXO's will be more, but most are 
$25.00 including the crystal. They do have a $60.00 minumum, but that includes 
the shipping so 2 channel elements in most cases will meet the minimum.

Steve
WA6ZFT


> 
> From: Kevin Custer <[EMAIL PROTECTED]>
> Date: 2005/05/12 Thu PM 02:30:17 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Caution on Bomar Crystals
> 
> 
> >>Expensive: Mototola Mitrek recrystal and tempco at ICM: $50.00/element. 
> >>Bomar is $35.00. West is appx. $32.00.
> >>
> >>
> >
> >There was a debate regarding West Crystal's alleged "temperature 
> >compensation" a week or two ago on here.  Check the archives - I forget the 
> >conclusion, if any.
> >
> >Bob NO6B
> >
> 
> The figures above that Steve-WA6ZFT gave are incorrect.  Bomar charges 
> $25 to re-crystal and TC "your" element, not $35
> 
> YMMV, but in a direct conversation with a person claiming to be an 
> engineer at West, I wasn't convinced that they actually TC the crystal 
> in the element/ICOM.  Only after a VERY lengthy discussion and proving 
> that I knew the difference between TC'ing and "netting" did he admit to 
> only changing the parallel capacitor to achieve "on frequency" with the 
> trimmer centered.  His thought was this measure was "compensating" the 
> element.  After that, I was uncertain that West Crystal actually knew 
> what proper ICOM or Channel Element TC'ing really was.
> 
> I was also not convinced that they check the modulation linearity or 
> characteristics when redoing a FM TX element, something that I know ICM 
> and Bomar does.  Does West Crystal do this,  I don't know, and I'm not 
> going to call yet again to find out.  I was very discouraged from 
> talking to them the first time, as I think they were trying to buffalo 
> me into thinking I was getting something I'm convinced they weren't giving.
> 
> In crystals and crystal companies, you get what you pay for
> Again, YMMV, and likely will.
> 
> Kevin
> 
> 
> 





 
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Re: Re: [Repeater-Builder] Caution on Bomar Crystals

[hwstar]

Expensive: Mototola Mitrek recrystal and tempco at ICM: $50.00/element. Bomar 
is $35.00. West is appx. $32.00.

Heck, the radios that use these elements arent worth more than $20.00 on the 
used market!

Steve 
WA6ZFT



> 
> From: DCFluX <[EMAIL PROTECTED]>
> Date: 2005/05/11 Wed PM 05:23:34 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Caution on Bomar Crystals
> 
> When I use ICM I am usually charged $20 each rock for a 2-3 week cutting time.
> 
> But if this is what evryone else charges I don't know where the
> "Expensive" label comes from.  I used to use a company that charged $6
> each, but there junk drifted about once a month.
> 
> On 5/11/05, Bob Dengler <[EMAIL PROTECTED]> wrote:
> > At 5/10/2005 08:40 PM, you wrote:
> > 
> > >Why is it  a common theme for some in this group make a statement such as
> > >this?:
> > >
> > >
> > > > If you cannot afford International, you cannot afford to put a repeater 
> > > > on
> > > > the air.
> > >
> > >
> > >What a fine piece if discouragement this is for the people just learning to
> > >put a repeater together. Ham radio is all about experimenting to see what 
> > >you
> > >can get away with. It is not a commercial endeavour where crystals have to
> > >meet 2.5ppm! If the crystals don't perform to your expectations from one
> > >vendor, try someone else.
> > >
> > >Steve
> > >WA6ZFT
> > 
> > Very well put, Steve.
> > 
> > In addition, I will add that my limited experience with ICM has ranged
> > anywhere from about the same as Standard & West Crystal (latter is what I
> > currently use) to poor.  This is why I don't regard ICM as being a
> > "perfect" source.  Why should I pay more for a product of comparable 
> > quality?
> > 
> > Bob NO6B
> > 
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> >
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 





 
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Re: Re: [Repeater-Builder] Looking for Microwave Associates 7R011T Isolator

[hwstar]

Michael,

Thanks for the additional info. The "soft" power meter on the HP8920 service 
monitor goes down to 4 decimal places
maybe this will be useful for low power testing.

Steve
WA6ZFT
 
> 
> From: Micheal Salem <[EMAIL PROTECTED]>
> Date: 2005/05/06 Fri PM 01:59:44 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Looking for Microwave Associates 7R011T 
> Isolator
>  Tuning Procedure
> 
> Steve:
> 
> You are welcome.   Maybe Kevin or Mike will post it to the website.
> 
> Let me make a couple of points that I hope will help. I learned these
> many years ago when I had a 7R011 given to me. 
> 
> Someone had tried to put a PL-259 into the N connector and sheared
> off the interior pin.  I took the 7R011 apart and was able to fit a new
> female chassis N connector on the isolator. 
> 
> I could never get it anywhere near the specs.  So, I called Microwave
> Associates and spoke to someone in their repair department.  I described
> what had happened and what I had done.  He told me that this was
> very tricky to do and that they used nonmagnetic copper vises to position
> the isolator just right when assemblying or repairing it.
> 
> For not much money at the time (maybe $50.00 to $70.00, I don't remember),
> they repaired the connector and it came back like new.   I also got some
> information from the repair man about the isolator and how to treat it.
> 
> He told me to be sure and use brass or other nonmagnetic materials when
> mounting it and to not to take it off the panel.  It mounts on the panel on
> standoffs.  So brass screws and aluminum standoffs were what I used.
> 
> All I got was the isolator (that was all that was broken).  But a friend 
> of mine
> had an aluminum panel that he had for one.  I eventually acquired a 
> couple of
> the low pass filter around and at Dayton one year and had a couple of the
> 100 watt Microwave Associates dummy loads that it took and a smaller
> 25 watt load.  It tuned up and seemed to work well.   I ran it on a UHF
> repeater with no problems.
> 
> One of the problems in tuning was getting enough sensitivity to read the
> reverse hookup (RF into the antenna port and measure power coming out
> of the transmitter port).  I had a 1 watt UHF slug, so that I could read
> .1 watt and that could be about 30 db from 10 watts. 
> 
> However, it occurs to me that you could use that W7ZOI wattmeter
> that uses the Analog Devices RF power measurement chip (I think AD8037))
> which would let you use lower power and go down -50 to 80 db.  Might
> want to put a 20 db attenuator in line in case you get it out of tune and
> a lot of power comes down and blows up your Wattmeter. 
> 
> Of course, I think that Microwave Associates was expecting everybody to
> have an HP 435B with an appropriate RF head is what they are looking at,
> but the Gilbert Cell AD8037 seems to me to be a good replacement.
> 
> I recently got another 7R011 and will have to dig out an aluminum panel
> to put it on and get some dummy loads.
> 
> I hope this is helpful.
> 
> Micheal Salem N5MS
> Norman, Oklahoma 
> 
> 
> 
> 
> 
> Steve Rodgers wrote:
> 
> >Michael,
> >
> >Thanks, This is exactly what I was looking for.
> >
> >Steve
> >WA6ZFT
> >
> >On Thursday 05 May 2005 21:58, Micheal Salem wrote:
> >  
> >
> >>Steve:
> >>
> >>As a matter of fact, I do have tuneup instructions that I got from
> >>Microwave Associates.
> >>They are attached.
> >>
> >>I have successfully tuned a 7R011 using these.   I did not have a power
> >>meters, but
> >>could use a smaller element in a Bird wattmeter and got pretty good
> >>isolation.
> >>
> >>Micheal Salem N5MS
> >>
> >>Steve Rodgers wrote:
> >>
> >>
> >>>Does anyone have a tuning procedure they could share for the Microwave
> >>>Associates 7R011T dual-stage UHF Isolator? I have 2 of these tuned on 454
> >>>and 462MHz. I've never attempted to tune isolators so any tips would be
> >>>useful. Can these be tuned with a tracking generator/spectrum analyzer?
> >>>
> >>>Steve
> >>>WA6ZFT
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>Yahoo! Groups Links
> >>>  
> >>>
> >>Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> > 
> >Yahoo! Groups Links
> >
> >
> >
> > 
> >
> >
> >
> >
> >  
> >
> 
> 





 
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Re: Re: [Repeater-Builder] What PA temp is too much?

[hwstar]

My solution is an LM34 expoxied to the hottest part of the heatsink  (For a 
T44, 4th-5th fin in from the right viewed from the back) connected to a PIC 
12C675 microprocessor. The firmware in the PIC turns the fan on at 100 degrees 
F when there is PTT present, and runs it for 2 1/2 minutes before checking it 
again. If the temperature exceeds 140 degrees F, the PIC will interrupt the PTT 
line to the transmitter. My T44's stabilize at 104-107 degrees F with a 26CFM 
blower and duct directing the blower's flow over across all heatsink fins. The 
heatsink temperature stabilizes to 104-115 degrees at ambient (70-75 degrees 
F.).


Steve WA6ZFT
 
> 
> From: Mike Morris WA6ILQ <[EMAIL PROTECTED]>
> Date: 2005/02/17 Thu PM 01:26:12 EST
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] What PA temp is too much?
> 
> On the radios that do not have a flat, open heat sink surface
> near the final transistor I drill and tap the base of the
> exposed fin nearest to it.  A drop of heat sink compound
> between the thermal switch and the fin also helps the
> responsiveness of the sensor...
> 
> I've also seen a fan control diagram somewhere that used
> a thermistor mounted along with the fan switch.  The
> CMOS timer was that chip that had the oscillator and a
> dozen or so stages of divide-by-two.  The thermistor was
> wired in the RC network so that the hotter it got the longer
> the timeout period was. This kept the fan on longer the
> hotter the thermistor got.
> The timer was set up to start with PTT and when it was
> released the timing period started.  The minimum was
> 4 to 5 minutes, the longest was a few hours.
> 
> A second fan switch set at a higher temperature turned
> on second fan, in case the first fan died.  The switch also
> keyed a digital input on the controller, which changed the
> courtesy beep from a single beep (normal) to 4 beeps
> (Morse "H", meaning HOT).
> 
> Mike WA6ILQ
> 
> At 09:44 AM 2/17/05, you wrote:
> 
> >OK, well I was going to incorporate a fan also onto the heatsink, which I 
> >had already planned but didn't mention.  The fan is activated by the 
> >controller and comes on when the PTT activates and goes off 1 minute after 
> >the PTT drops.  But, I have a feeling that the fan I have will not be 
> >adequate for long transmissions, but I am not sure.  So I was going to 
> >hook up the thermal warning to the controller since I had a spare digital 
> >input.  So, now with knowing I am using a fan, where on the heatsink 
> >should I place the sensor.  Should I put it right near the heatsink bolt 
> >on the transistor or should I put it on on of the fins.  I think closer to 
> >the transistor bolt, but let me know your thoughts.
> >
> >Larry, N8RDT
> >
> >[EMAIL PROTECTED] wrote:
> >Henry Radio uses 125 degree thermo-switches on their commercial amps. If 
> >you check out their web page they sell the switches for $9.50  The 
> >switches are used to activate 12-V cooling fans on their amps.
> >
> >
> >
> >
> >
> >
> >Do you Yahoo!?
> >The all-new My Yahoo! – Get yours free!
> >
> >
> >
> >
> >
> >
> >
> >--
> >Yahoo! Groups Links
> >* To visit your group on the web, go to:
> >* 
> > http://groups.yahoo.com/group/Repeater-Builder/
> >  
> >
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Re: Re: [Repeater-Builder] Source for Moto T1504 duplexer

[hwstar]

Mike,

I've ordered some from mc-master. I'll let everyone know how they work out.

Steve
WA6ZFT

> 
> From: Mike Morris WA6ILQ <[EMAIL PROTECTED]>
> Date: 2005/02/16 Wed PM 12:26:53 EST
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: Re: [Repeater-Builder] Source for Moto T1504 duplexer
>   locking  nuts?
> 
> 
> At 09:02 AM 2/16/05, you wrote:
> 
> >Jack,
> >
> >Thanks for the info.
> 
> Agreed !  Thanks for looking that up and posting it.
> 
> 
> >Mike (ILQ) - Maybe add this to the duplexer page on repeater builder?
> >
> >   94830A550
> >   Cadmium-Plated Stl Hex Thin Flex-Top Locknut 1/2"-20 Screw
> >Size, 3/4" Width, 21/64" Height
> >   In stock at $10.91 per Pack
> >   This item is only sold in Packs of 10
> >
> >Packs of 10
> >
> >   http://www.mcmaster.com/
> >
> >
> >   Here you go!
> >
> >   Jack
> >   K6YC
> 
> The store in Santa Fe Springs is within reasonable driving distance, and
> I will be in that area next week.  I'll take an original locknut with me and
> compare.  If they work out, I'll buy a 10-pack (since I need six anyway),
> add a photo of both nuts side-by-side and some text to the T-1500 page
> at 
> 
> Mike WA6ILQ
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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Re: Re: [Repeater-Builder] Source for Moto T1504 duplexer locking nuts?

[hwstar]

Jack,

Thanks for the info. 

Mike (ILQ) - Maybe add this to the duplexer page on repeater builder?


  94830A550
  Cadmium-Plated Stl Hex Thin Flex-Top Locknut 1/2"-20 Screw 
Size, 3/4" Width, 21/64" Height
  In stock at $10.91 per Pack
  This item is only sold in Packs of 10

   Packs of 10



  http://www.mcmaster.com/


  Here you go!

  Jack
  K6YC





 
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94830A550
  Cadmium-Plated Stl Hex Thin Flex-Top Locknut 1/2"-20 Screw 
Size, 3/4" Width, 21/64" Height
  In stock at $10.91 per Pack
  This item is only sold in Packs of 10

   Packs of 10



  http://www.mcmaster.com/


  Here you go!

  Jack
  K6YC

- Original Message - 
From: "mch" <[EMAIL PROTECTED]>
To: 
Sent: Wednesday, February 16, 2005 1:17 AM
Subject: Re: [Repeater-Builder] Source for Moto T1504 duplexer locking nuts?


>
> Well, this will give you the specs on it. It subs to another number, and
> that other part is NLA, but the description is still there.
> ___
> Item number. 0210397A06* The item 0210397A06 has been replaced
> with 0210348A05. Selecting this
> item will add 0210348A05 to your cart.
> 0210348A05: Item has been cancelled
>
> NUTLCK 1/2-20X5/16 HEX STL CAD
> Unit of Measure: 3  PK
> ___
>
> Joe M.
>
> Mike Morris WA6ILQ wrote:
>>
>> At 12:59 PM 2/15/05, you wrote:
>>
>> >I have a Motorola T1504 duplexer in need of 4 locking nuts. The locking
>> >nut part number is 2-10397A06, but a call to Motorola parts indicates 
>> >the
>> >part number isn't on file. Does anyone have any recommendations for a
>> >substitute part, and do they know what the nut size and thread pitch are
>> >for the locking nut?
>> >
>> >Steve
>> >WA6ZFT
>>
>> As I understand from a friend they've been NLA for a few years.
>>
>> I need 6 or so and am almost ready to call in a
>> favor and have a friend make some on a lathe,
>> starting with hex stock.
>>
>> Mike
>>
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
> 




 
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<>

[Repeater-Builder] Source for Moto T1504 duplexer locking nuts?

[hwstar]

I have a Motorola T1504 duplexer in need of 4 locking nuts. The locking nut 
part number is 2-10397A06, but a call to Motorola parts indicates the part 
number isn't on file. Does anyone have any recommendations for a substitute 
part, and do they know what the nut size and thread pitch are for the locking 
nut?

Steve
WA6ZFT






 
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Re: Re: [Repeater-Builder] Hustler G6-440

[hwstar]

Richard,

Did you ever determine what the failure mode of the antennas was? Was it due to 
high power (>50W), or damage in a rough environment? This would be interesting 
as I have a couple of low level repeaters with G6-440's in a temperate climates
which have not degraded in performance.

I wouldn't want to use a G6-440 in an environment which sees any ice and wind, 
they are too frail for that environment.

Steve 
WA6ZFT





> 
> From: "Richard Velez" <[EMAIL PROTECTED]>
> Date: 2005/02/09 Wed PM 12:28:47 EST
> To: 
> Subject: Re: [Repeater-Builder] Hustler G6-440
> 
> 
> I started off with the 2 G6-440 my self. It lasted about a year before
> the SWR started flying thru the roof and the second about 7 months after
> that.  Pattern was ok while it lasted. Go for DB products and save
> yourself from headaches later.
> Good Luck
> Rich/N2ROW
> 
> >>> [EMAIL PROTECTED] 2/9/05 8:24:41 AM >>>
> Good morning Jeff and the group,
> I have not had the best of luck
> with the Hustler G-6 why do you
> not look into something like the
> DB-404 if you need a lower end
> antenna. It will hold up nice. Or
> a mid priced DB-408 more gain
> just a bit higher in price. Or for some
> real gain the DB-420 all will do better
> then the G-6 and all will last a whole
> lot longer. Plus real gain and much
> better built. I would research the 
> commercial antennas before spending
> money for a Ham grade repeater antenna.
> This has been my findings over the years.
> Before any one un knowingly says they do not
> make them for 440 WRONG! A suppler has
> to buy them 50 at a time then stock them till
> we buy them (we being us Hams.). So yes
> some suppliers do stock and sell the DB-404,
> 408  and yes even the 420.
> Good luck!
> Very best of 73,
> Russ, W3CH
> 
>   - Original Message - 
>   From: Jeff Corkren 
>   To: Repeater Builder 
>   Sent: Wednesday, February 09, 2005 3:53 AM
>   Subject: [Repeater-Builder] Hustler G6-440
> 
> 
>   Does anyone have experience using the Hustler G6-440 UHF antenna for
> repeater use ? The antenna will be mounted at the 500 ft level on a
> broadcast tower and must be capable of withstanding this sometimes
> violent environment. An upper antenna support cannot be used due to the
> distance from the tower to the edge of the platform where the antenna
> will be mounted. Thanks for your reply. 
> 
>   Jeff Corkren/W5PPB
>   Raymond, Mississippi 
> 
> 
> 
> 
> 
> 
> 
> 
> --
>   Yahoo! Groups Links
> 
> a.. To visit your group on the web, go to:
> http://groups.yahoo.com/group/Repeater-Builder/ 
>   
> b.. To unsubscribe from this group, send an email to:
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> 
> 
>  
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> 
> 
>  
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> 





 
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Re: Re: [Repeater-Builder] UHF Mitrek LO leakage mitigation

[hwstar]

Eric,

Thanks for the tips.

Steve
WA6ZFT

> 
> From: Eric Lemmon <[EMAIL PROTECTED]>
> Date: 2005/02/01 Tue PM 08:31:43 EST
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] UHF Mitrek LO leakage mitigation
> 
> 
> Steve,
> 
> The single most important step in mitigating fugitive LO emissions is
> ensuring that all shields are in place and properly seated, and all
> screws are in place and tight.  Anyone who has had LO leakage with
> Micors knows that you can't leave out any shields, and the same
> precaution applies to Mitreks and almost any other brand or model.
> 
> If the shields are in place and the covers are tightly fitted, then
> adding ferrite filter cores on the power and control leads may help. 
> The fact that your Mitrek has been modified suggests that the mods may
> be at the heart of the problem.  I'd look first at any DC control leads
> that enter or are near the LO, and apply ferrite chokes or feedthrough
> capacitor filters as appropriate.
> 
> 73, Eric Lemmon WB6FLY
> 
> [EMAIL PROTECTED] wrote:
> > 
> > Hi,
> > 
> > I have a modified UHF mitrek mobile in repeater service which is emitting a 
> > strong signal at 1/3 of the LO mixer injection frequency.  Before I travel 
> > to the site which is over 300 miles away, I'd like to make a list of things 
> > to check when I get there. I know the preselector can be problematic, as 
> > well as the channel elements themselves.
> > 
> > What have the lest members tried with success to mitigate the LO radiation 
> > from Mitrek mobiles?
> > 
> > I know that this radio should have have the preselector cold-end helical 
> > coils resoldered. A Cactus technical article mentions this should be done 
> > with silver solder.
> > Does anyone know why silver solder is preferred?
> > 
> > Steve
> > WA6ZFT
> > 
> > 
> > 
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> >
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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[Repeater-Builder] UHF Mitrek LO leakage mitigation

[hwstar]

Hi,

I have a modified UHF mitrek mobile in repeater service which is emitting a 
strong signal at 1/3 of the LO mixer injection frequency.  Before I travel to 
the site which is over 300 miles away, I'd like to make a list of things to 
check when I get there. I know the preselector can be problematic, as well as 
the channel elements themselves.

What have the lest members tried with success to mitigate the LO radiation from 
Mitrek mobiles?

I know that this radio should have have the preselector cold-end helical coils 
resoldered. A Cactus technical article mentions this should be done with silver 
solder.
Does anyone know why silver solder is preferred?

Steve
WA6ZFT


 






 
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Re: [Repeater-Builder] Re: Setting RX and TX audio levels from TDM/ E&M circuits

[hwstar]

Thanks for the response. 

Steve
WA6ZFT

> 
> From: "nj902" <[EMAIL PROTECTED]>
> Date: 2005/01/28 Fri PM 06:54:11 EST
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Setting RX and TX audio levels from TDM/ E&M 
> circuits
> 
> 
> 
> --- In Repeater-Builder@yahoogroups.com, <[EMAIL PROTECTED]> wrote:
> "When connecting a transmitter and receiver to a TDM circuit with E&M
> termination, what is the TX deviation setting for 0DBm of drive at
> 1004Hz?..."
> __
> _
> 
> The Motorola systems I have worked on all used a -10dBm test tone for
> all level setting.  Receivers are set to deliver -10 for a 60%
> deviation input and transmitters are set to modulate 60% when -10 is
> applied.
> 
> Given that transmit audio voice peaks are specified in Motorola
> documentation as being 6dB above average voice level, that puts peak
> audio on these circuits at -4dBm which leaves quite a bit of headroom.
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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[Repeater-Builder] Setting RX and TX audio levels from TDM/ E&M circuits

[hwstar]

When connecting a transmitter and receiver to a TDM circuit with E&M 
termination, what is the TX deviation setting for 0DBm of drive at 1004Hz?

Most TDM circuits will go to +5dbm before clipping, so is this extra headroom 
into account, or is 0DBm supposed to generate 5KHz of deviation at 1004 Hz?

Thanks,

Steve
WA6ZFT






 
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Re: Re: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?

[hwstar]

No offense intended. The guy had the cable so he had nothing to lose other than 
his time to try it out.

Steve
WA6ZFT

> 
> From: "Chuck Kelsey" <[EMAIL PROTECTED]>
> Date: 2005/01/17 Mon PM 03:02:45 EST
> To: 
> Subject: Re: Re: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?
> 
> 
> I didn't think that the answer was short and terse. If one has the coax 
> already and is going to try it on a low profile site, that's one thing. 
> However, I hate to see someone go out and buy new LMR-XXX cable only to 
> discover that they should have spent their money on something a bit better 
> for not that much more money.
> 
> Can you get away running LMR or 9913 type cable on a repeater? Maybe. Just 
> don't be too disappointed if you find it doesn't work well.
> 
> Chuck
> WB2EDV
> 
> 
> 
> - Original Message - 
> From: <[EMAIL PROTECTED]>
> To: 
> Sent: Monday, January 17, 2005 1:05 PM
> Subject: Re: Re: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?
> 
> 
> >
> >
> > The short, terse answers to these types of questions should be ignored, 
> > and you should try it out yourself. If it works, great! If you have 
> > problems, get rid of it and try something else.  This is what makes ham 
> > radio fun.
> >
> > Steve
> > WA6ZFT
> >
> >
> >>
> >> From: "John J. Riddell" <[EMAIL PROTECTED]>
> >> Date: 2005/01/17 Mon PM 12:59:29 EST
> >> To: 
> >> Subject: Re: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?
> >>
> >>
> >> Derek,  Give the LMR-400 to someone who is not running Duplex.
> >>
> >> Pick up some Andrews Heliax.
> >>
> >> John VE3AMZ
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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Re: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?

[hwstar]

I'd be willing to bet your noise problem is site related and has nothing to do 
with the feedline. Rusty wires and rusty metal can cause micro-arcing just like 
the shield/braid problem in the LMR400 cable, especially in windy conditions. 
The problem is your options are limited in trying to find and fix these noise 
sources. 

With the system being noisy and you physical present at the site, cap off the 
feed line at the antenna with a dummy load
and check for noise. If there's still noise, It could be the feedline, duplexer 
or a repeater TX problem.

If the dummy load trick eliminates the noise, Try using a separate antenna for 
RX and TX, and run them into the cans without the "T" connector. If you can get 
some decent vertical separation > (40ft.) , this might be worth a try. This 
will provide more isolation from locally generated noise.

Steve
WA6ZFT


> 
> From: "derek_mcintyre" <[EMAIL PROTECTED]>
> Date: 2005/01/17 Mon PM 12:40:14 EST
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?
> 
> 
> 
> Hello Group,
> I have read the messages and heard the debates about using LMR-400 or 
> 99/13 type cables with aluminum foil mixed with tinned copper braid, 
> and the duplex noise it presents when used on the output of the 
> duplexer to the antenna.  I have tried to stay away from this since I 
> got serious about higher powered ( > 110 watt) transmitters used for 
> duplex service.
> 
> I recently ran across a pile of LMR-400 "DB" I believe it's called, 
> it has a sticky substance throughout and is said to be water tight.
> 
> I used a 90 foot piece of this cable on a VHF repeater running ~ 80 
> watts out of the duplexer and feeding a very reliable, "duplex noise 
> free" antenna on the tower.
> 
> I couldn't believe the duplex noise I get from somewhere, and I am 
> thinking it's the cable itself.  When injecting a signal through a 
> directional coupler, I am receiving ~ 0.25 uV for 20 dB SINAD while 
> running full power.  But each time I even think about touching the 
> feedline, a ton of noise occurs (better than 30 dB of duplex noise).  
> I have tried both crimp on and compression N-type connectors but no 
> difference.
> 
> The duplexer is a new Wacom with 214 interconnect cables.  
> 
> Can this LMR-400 really be the cause of noise this bad?  There are 
> two pagers (152.480 and 158.700) about 1/2 mile from the site.  No 
> other transmitters besides a few UHF repeaters.  Everything at the 
> site has an isolator on the transmitter output, including my 2M 
> repeater.  Something is arc'ing somewhere.  Any suggestions besides 
> changing the entire feedline to something more reliable, such as 1/2 
> inch Heliax or hardline without braid?
> 
> Thanks, KC4FWC
> Derek.
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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Re: Re: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?

[hwstar]

The short, terse answers to these types of questions should be ignored, and you 
should try it out yourself. If it works, great! If you have problems, get rid 
of it and try something else.  This is what makes ham radio fun. 

Steve 
WA6ZFT


> 
> From: "John J. Riddell" <[EMAIL PROTECTED]>
> Date: 2005/01/17 Mon PM 12:59:29 EST
> To: 
> Subject: Re: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?
> 
> 
> Derek,  Give the LMR-400 to someone who is not running Duplex.
> 
> Pick up some Andrews Heliax.
> 
> John VE3AMZ
> - Original Message - 
> From: "derek_mcintyre" <[EMAIL PROTECTED]>
> To: 
> Sent: Monday, January 17, 2005 12:40 PM
> Subject: [Repeater-Builder] Duplex noise/LMR-400 w/sticky stuff?
> 
> 
> > 
> > 
> > Hello Group,
> > I have read the messages and heard the debates about using LMR-400 or 
> > 99/13 type cables with aluminum foil mixed with tinned copper braid, 
> > and the duplex noise it presents when used on the output of the 
> > duplexer to the antenna.  I have tried to stay away from this since I 
> > got serious about higher powered ( > 110 watt) transmitters used for 
> > duplex service.
> > 
> > I recently ran across a pile of LMR-400 "DB" I believe it's called, 
> > it has a sticky substance throughout and is said to be water tight.
> > 
> > I used a 90 foot piece of this cable on a VHF repeater running ~ 80 
> > watts out of the duplexer and feeding a very reliable, "duplex noise 
> > free" antenna on the tower.
> > 
> > I couldn't believe the duplex noise I get from somewhere, and I am 
> > thinking it's the cable itself.  When injecting a signal through a 
> > directional coupler, I am receiving ~ 0.25 uV for 20 dB SINAD while 
> > running full power.  But each time I even think about touching the 
> > feedline, a ton of noise occurs (better than 30 dB of duplex noise).  
> > I have tried both crimp on and compression N-type connectors but no 
> > difference.
> > 
> > The duplexer is a new Wacom with 214 interconnect cables.  
> > 
> > Can this LMR-400 really be the cause of noise this bad?  There are 
> > two pagers (152.480 and 158.700) about 1/2 mile from the site.  No 
> > other transmitters besides a few UHF repeaters.  Everything at the 
> > site has an isolator on the transmitter output, including my 2M 
> > repeater.  Something is arc'ing somewhere.  Any suggestions besides 
> > changing the entire feedline to something more reliable, such as 1/2 
> > inch Heliax or hardline without braid?
> > 
> > Thanks, KC4FWC
> > Derek.
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> >  
> > Yahoo! Groups Links
> > 
> > 
> > 
> >  
> > 
> > 
> > 
> > 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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Re: Re: 4-wire E&M + VoIP (was: Re: [Repeater-Builder] Re: Remote Receiver

[hwstar]

Regarding digital repeaters and radios-- all fine and good. But none of this is 
available to hams right now, and it'll be a decade or so till it completely 
replaces what is out there. As you mentioned the barriers are proprietary 
protocols and licensing costs. 

As for modifying the IAXy or Sipura boxes, The firmware is proprietary in the 
IAXY (non-gpl). The only way I see to use the IAXy is to modify the firmware to 
deal with COR and PTT instead of off-hook and ring generate, and hack the codec 
interface for 4 wire audio. I suppose you could call Digium and see if they 
might license the IAXy tech to you for dedicated 2-way radio use.

Your $99 solution for a single port analog to radio interface is illusory. Even 
if you could make a modified
IAXy or Sipura, the customization would blow the discounts afforded by 
economies of scale out of the water, not to mention the licensing fees Digium 
might charge you to adapt it to a radio application.

The only way I see the cheap single port TCP-IP adapter come to pass is if 
someone comes out with a VOIP router/gateway box which runs Linux and can be 
made to run Asterisk. The WRT54G is close. If the WRT54G had a VOIP port which 
could be modified to run in 4-wire mode, then this would be a cheap platform 
which could be hacked to do what you want. 


I'm beginning to wonder if we might be competition for something you are 
cooking up.

Steve
WA6ZFT.







We are currently investigating packaged solution which fits into a short 1U 
rack and runs off of 13.8V. 

I hear rumors that a WRT54G can be made to run Asterisk. This could be a 
platofrm on which you could kludge a codec




> 
> From: Nate Duehr <[EMAIL PROTECTED]>
> Date: 2004/12/08 Wed PM 03:40:17 EST
> To: Repeater-Builder@yahoogroups.com
> CC: Jim Dixon <[EMAIL PROTECTED]>
> Subject: Re: 4-wire E&M + VoIP (was: Re: [Repeater-Builder] Re: Remote 
> Receiver
> 
> 
> Steve Rodgers wrote:
> 
> >Nate,
> >
> >Why not use a full duplex RF link to your data center?  That way you could 
> >have "dumb" hardware at the site, and all your smarts at the data center. 
> >You 
> >could also avoid paying for a DSL connection at the site as well.
> >
> >Steve
> >WA6ZFT
> >  
> >
> Ah, a number of reasons. 
> 
> Commercial sites you pay by the antenna, but there's more often than not 
> at least one TCP/IP pipe that someone already pays for at most 
> commercial sites now that an appropriate deal can be made to ride along 
> on, and some really fat shared pipes available at some.
> 
> Simplicity - maintaining a cheap IAXy device (throw it away if it 
> breaks) is better than messing with multiple link radios, feedlines, 
> antennas, etc.  Put the redundancy in the data network instead.
> 
> Why?  If you put your own IP pipes in, you can do other things with 
> them... it's more "universally useful" than a dedicated link radio to do 
> other "stuff" with at the sites... remote monitoring, reprogramming, run 
> club servers, remote power switching, etc etc etc... and 
> what-have-you... lots of uses only limited by imagination -- a dedicated 
> link radio is a one-hit wonder.
> 
> Your solution definitely "works", we're just imagining the "next level". 
> 
> Hams are so far behind the commercial technology it's not even funny.  
> Many modern commercial repeaters now have an Ethernet port right on the 
> back and various proprietary ways to pass audio, signalling, etc... from 
> the repeaters to PC's or other repeaters, or whatever else you like on 
> the networking side.  Many are using TCP/IP multicast and UDP transport 
> which is great for private networks but a pain in the butt on the 
> Internet-at-large without building VPN tunnels but that could "easily" 
> be changed by the manufacturers.  They're on a steep learning curve 
> right now figuring out how to do data networking at a layer more 
> involved than just transporting the bits for other people.
> 
> There are those of us out here who'd happily work on "better" solutions 
> to these common problems and possibly even come up with interesting ways 
> for the commercial folks to interoperate (experimentation is what hams 
> do best!), but we're essentially locked out by price and lack of truly 
> open standards.  Normal stuff, but frustrating if digital stuff is "what 
> you know"... you know you could come up with interesting solutions to 
> common problems of inter-operation, etc.
> 
> I got a chance to play with some APCO-25 digital radios recently and got 
> the eye-opener of how "old-school" ham repeaters really are.  You gain 
> an incredible amount of functionality by putting more digital "brains" 
> in the radios.
> 
> It's really a little disappointing that even though APCO-25 is an open 
> standard, the codec they chose to use is a licensed one instead of based 
> on an open standard also.  I don't think IMBE is going to give away the 
> CODEC for non-commercial use.  (Although I haven't asked.)  So the 
> Vocoder is the stumbling block for u

Re: [Repeater-Builder] Re: Moto Desktrac 25 pin acc. connector pinout

[hwstar]

Thanks - 

Steve WA6ZFT

> 
> From: "nj902" <[EMAIL PROTECTED]>
> Date: 2004/12/03 Fri PM 03:57:14 EST
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Moto Desktrac 25 pin acc. connector pinout
> 
> 
> 
> --- In Repeater-Builder@yahoogroups.com, <[EMAIL PROTECTED]> wrote:
> "...Can anyone respond with the pin out of the 25 pin D-sub 
> connector on the back of a motorola desktrac? ..."
> _
> 
> http://batboard.batlabs.com/viewtopic.php?t=36497
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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[Repeater-Builder] Moto Desktrac 25 pin acc. connector pinout

[hwstar]

Hi,

Can anyone respond with the pin out of the 25 pin D-sub connector on the back 
of a motorola desktrac? Also, what jumper inside the  unit disables the time 
out timer?

Steve
WA6ZFT





 
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Re: 4-wire E&M + VoIP (was: Re: [Repeater-Builder] Re: Remote Receiver

[hwstar]

Nate,

We have the hardware and software solution you are looking for. See 
www.zapatatelephony.com under the remote base link.

Steve
WA6ZFT.

> 
> From: Nate Duehr <[EMAIL PROTECTED]>
> Date: 2004/12/02 Thu PM 12:31:30 EST
> To: Repeater-Builder@yahoogroups.com
> Subject: 4-wire E&M + VoIP (was: Re: [Repeater-Builder] Re: Remote Receiver
>  PL)
> 
> 
> edctexas wrote:
> 
> >A microwave system is great for the handling of a remote receiver 
> >system.  Most of the link channels are 4W and do have E&M signalling. 
> >  
> >
> Hey since 4-wire E&M came up here... I'll ask this question to this 
> list.  I've asked various VoIP lists, but haven't had any positive 
> responses yet.
> 
> I see tons of cheap 2-wire to Ethernet/SIP/VoIP interface boxes on the 
> market, and I know that higher-end Cisco routers have 4-wire E&M cards 
> available for VoIP, but has anyone seen a cheap single or dual-port 
> 4-wire E&M to VoIP "ATA" device like the 2-wire ones anywhere?
> 
> I can think of some REALLY useful purposes for radio linking at sites 
> that have TCP/IP connectivity... but you really need those E&M leads to 
> do any type of PTT/COS signaling.
> 
> I asked a couple of the ATA manufacturers about it and they said, "Not 
> enough interest, but we'll build 10,000 of them if someone wants that many."
> 
> Darn... not quite there yet... and I don't want to buy an 4-port card 
> and a full Cisco to do the job... too expensive for the applications I'm 
> thinking about.  I also need the box to be "dumber" as I just want it to 
> pass the E&M leads and not try to interpret them as anything.
> 
> Nate WY0X
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 





 
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Re: Re: [Repeater-Builder] Repeater Controller

[hwstar]

Please visit the link. No T1 service is necessary.

Steve
WA6ZFT

> 
> From: <[EMAIL PROTECTED]>
> Date: 2004/09/27 Mon PM 07:19:23 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: Re: [Repeater-Builder] Repeater Controller
> 
> Just add $692.00 per month from your local provide
> telco for a 24 channel T-1 line with a 5 year contract
> and your in business!
> 
> B:)
> 
> $$$ Plus installation of the T-1...
> 
> Some one here said your mileage will vary...:)
> 
> --- [EMAIL PROTECTED] wrote:
> 
> > If you want to run all these repeaters at the same
> > site,
> > and have VOIP linking capability, you might want to
> > check out www.zapatatelephony.org/app_rpt.html.
> > 
> > A system could be set up for under $1200 that could
> > control
> > up to 12 repeaters at the same site as well as link
> > to other
> > sites with an app_rpt/Asterisk system.
> > 
> > Digium single port T1 Adapter card $500.00
> > Used 24 channel T1 FXS Channel Bank from E-bay
> > $150.00
> > 5 Telephone adapter boards $300 (kit form)
> > retired 600MHz PC with 20GB hard disk $200.00
> > 
> > 
> > 
> > > 
> > > From: "Mr. Edgar McKinney" <[EMAIL PROTECTED]>
> > > Date: 2004/09/27 Mon PM 04:27:41 EDT
> > > To: Repeater-Builder@yahoogroups.com
> > > Subject: Re: [Repeater-Builder] Repeater
> > Controller
> > > 
> > > Ok... I'd like one to run a  42 Mcsr, 146 mcs, 225
> > Mcs, 444 Mcs, and a
> > > 900 pluss a remote base.
> > > 
> > > Ed
> > > 
> > > Paul Guello wrote:
> > > 
> > > >  Ed,The Link RLC-4 is a 4 port controller, I
> > don't think NHRC has
> > > > anything like that.Paul
> > > >
> > > > "Mr. Edgar McKinney" <[EMAIL PROTECTED]> wrote:
> > > >
> > > >  Do they have a controller like the LINK's
> > RLC-4?
> > > >
> > > >  Ed
> > > >
> > > >  Paul Guello wrote:
> > > >
> > > >  > Have you checked out the inexpensive
> > controller kits
> > > >  > from NHRC? They may have more features
> > than you need,
> > > >  > but they are easy to build and small.
> > > >  >
> > > >  > http://www.nhrc.net/
> > > >  >
> > > >  > Paul, KB9WLC
> > > >  >
> > > >  > --- goreks2000 wrote:
> > > >  >
> > > >  > > Hello
> > > >  > > I want to build a simple repeater
> > controller to have
> > > >  > > as a portable
> > > >  > > repeater along wit my Motorola HT800
> > (407-435mhz)to
> > > >  > > use on small
> > > >  > > motor sports event but I don't find (I
> > think I use
> > > >  > > one HT800 as RX
> > > >  > > and a mobile rig as TX ex yaesu FT7800)
> > > >  > > Any thing simple, most controllers have
> > DTMF or CTSS
> > > >  > > in it
> > > >  > > The only thing I need is PTT opening
> > (maybe 1750
> > > >  > > hz )
> > > >  > > And a Audio isolation/amplifier if
> > necessary
> > > >  > > Can any one help me with building
> > instructions
> > > >  > > Manny thanks and 73
> > > >  > > Göran SM1YCE
> > > >  > > Sweden
> > > >  > >
> > > >  > > Sorry for my bad spelling I hope you
> > understand any
> > > >  > > way
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > > Yahoo! Groups Links
> > > >  > >
> > > >  > >
> > > >  > >
> > [EMAIL PROTECTED]
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  >
> > > >  >
> > > >  > ___
> > > >  > Do you Yahoo!?
> > > >  > Declare Yourself - Register online to
> > vote today!
> > > >  > http://vote.yahoo.com
> > > >  >
> > > >  >
> > > >  > Yahoo! Groups Links
> > > >  >
> > > >  >
> > > >  >
> > > >  >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >  Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> >
> ---
> > > > Do you Yahoo!?
> > > > Yahoo! Mail is new and improved - Check it out!
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> >
> ---
> > > > Yahoo! Groups Links
> > > >
> > > >* To visit your group on the web, go to:
> > > > 
> > http://groups.yahoo.com/group/Repeater-Builder/
> > > >
> > > >* To unsubscribe from this group, send an
> > email to:
> > > > 
> > [EMAIL PROTECTED]
> > > >
> > > >* Your use of Yahoo! Groups is subject to the
> > Yahoo! Terms of
> > > >  Service.
> > > >
> > > 
> > > 
> > 
> > 
> > 
> > 
> >  
> > Yahoo! Groups Links
> > 
> > 
> > [EMAIL PROTECTED]
> > 
> >  
> > 
> -
> Ok... I'd like one to run a  42 Mcsr, 146 mcs, 225
> Mcs, 444 Mcs, anda 900 pluss a remote base.
> Ed
> Paul Guello wrote: Ed,The Link RLC-4 is a 4 port
> controller, Idon't think NHRC has anything like
> that.Paul
> "Mr. Edgar McKinney" <[EMAIL PROTECTED]> wrote:Dothey
> have a controller like the LINK's RLC-4?
> Ed
> Paul Guello w

Re: Re: [Repeater-Builder] Repeater Controller

[hwstar]

Mike,

I suppose you could do that, but our adapter board was designed so that the 
more commonly available FXS channel banks could be used. The two systems I have 
running use CAC Access bank I FSX channel banks which are $150 each on E-bay. 
In any case our adapter board has the transformers you mentioned.

A better solution will be available in the future, we
are designing a 4 port PCI card with a radio interface
(RX/TX audio, COR,PL, and PTT) which will eliminate the
need for a $500 T1 card and channel bank.

Steve
WA6ZFT



> 
> From: Mike WA6ILQ <[EMAIL PROTECTED]>
> Date: 2004/09/27 Mon PM 06:42:26 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: Re: [Repeater-Builder] Repeater Controller
> 
> If that channel band could be filled with E&M cards it would
> be a lot simpler.  A single E&M port talks to a radio just fine.
> M=PTT, E=COR, and transformer couple the audio.
> 
> Mike
> 
> At 02:34 PM 9/27/04, you wrote:
> 
> >If you want to run all these repeaters at the same site,
> >and have VOIP linking capability, you might want to check out 
> >www.zapatatelephony.org/app_rpt.html.
> >
> >A system could be set up for under $1200 that could control
> >up to 12 repeaters at the same site as well as link to other
> >sites with an app_rpt/Asterisk system.
> >
> >Digium single port T1 Adapter card $500.00
> >Used 24 channel T1 FXS Channel Bank from E-bay $150.00
> >5 Telephone adapter boards $300 (kit form)
> >retired 600MHz PC with 20GB hard disk $200.00
> >
> >
> >
> > >
> > > From: "Mr. Edgar McKinney" <[EMAIL PROTECTED]>
> > > Date: 2004/09/27 Mon PM 04:27:41 EDT
> > > To: Repeater-Builder@yahoogroups.com
> > > Subject: Re: [Repeater-Builder] Repeater Controller
> > >
> > > Ok... I'd like one to run a  42 Mcsr, 146 mcs, 225 Mcs, 444 Mcs, and a
> > > 900 pluss a remote base.
> > >
> > > Ed
> > >
> > > Paul Guello wrote:
> > >
> > > >  Ed,The Link RLC-4 is a 4 port controller, I don't think NHRC has
> > > > anything like that.Paul
> > > >
> > > > "Mr. Edgar McKinney" <[EMAIL PROTECTED]> wrote:
> > > >
> > > >  Do they have a controller like the LINK's RLC-4?
> > > >
> > > >  Ed
> > > >
> > > >  Paul Guello wrote:
> > > >
> > > >  > Have you checked out the inexpensive controller kits
> > > >  > from NHRC? They may have more features than you need,
> > > >  > but they are easy to build and small.
> > > >  >
> > > >  > http://www.nhrc.net/
> > > >  >
> > > >  > Paul, KB9WLC
> > > >  >
> > > >  > --- goreks2000 wrote:
> > > >  >
> > > >  > > Hello
> > > >  > > I want to build a simple repeater controller to have
> > > >  > > as a portable
> > > >  > > repeater along wit my Motorola HT800 (407-435mhz)to
> > > >  > > use on small
> > > >  > > motor sports event but I don't find (I think I use
> > > >  > > one HT800 as RX
> > > >  > > and a mobile rig as TX ex yaesu FT7800)
> > > >  > > Any thing simple, most controllers have DTMF or CTSS
> > > >  > > in it
> > > >  > > The only thing I need is PTT opening (maybe 1750
> > > >  > > hz )
> > > >  > > And a Audio isolation/amplifier if necessary
> > > >  > > Can any one help me with building instructions
> > > >  > > Manny thanks and 73
> > > >  > > Göran SM1YCE
> > > >  > > Sweden
> > > >  > >
> > > >  > > Sorry for my bad spelling I hope you understand any
> > > >  > > way
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > > Yahoo! Groups Links
> > > >  > >
> > > >  > >
> > > >  > > [EMAIL PROTECTED]
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  > >
> > > >  >
> > > >  >
> > > >  > ___
> > > >  > Do you Yahoo!?
> > > >  > Declare Yourself - Register online to vote today!
> > > >  > http://vote.yahoo.com
> > > >  >
> > > >  >
> > > >  > Yahoo! Groups Links
> > > >  >
> > > >  >
> > > >  >
> > > >  >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >  Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > ---
> > > > Do you Yahoo!?
> > > > Yahoo! Mail is new and improved - Check it out!
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > ---
> > > > Yahoo! Groups Links
> > > >
> > > >* To visit your group on the web, go to:
> > > >  http://groups.yahoo.com/group/Repeater-Builder/
> > > >
> > > >* To unsubscribe from this group, send an email to:
> > > >  [EMAIL PROTECTED]
> > > >
> > > >* Your use of Yahoo! Groups is subject to the Yahoo! Terms of
> > > >  Service.
> > > >
> > >
> > >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >Ok... I'd like one to run a  42 Mcsr, 146 mcs, 225 Mcs, 444 Mcs, and a 900 
> >pluss a remote base.
> >

Re: Re: [Repeater-Builder] Repeater Controller

[hwstar]

If you want to run all these repeaters at the same site,
and have VOIP linking capability, you might want to check out 
www.zapatatelephony.org/app_rpt.html.

A system could be set up for under $1200 that could control
up to 12 repeaters at the same site as well as link to other
sites with an app_rpt/Asterisk system.

Digium single port T1 Adapter card $500.00
Used 24 channel T1 FXS Channel Bank from E-bay $150.00
5 Telephone adapter boards $300 (kit form)
retired 600MHz PC with 20GB hard disk $200.00



> 
> From: "Mr. Edgar McKinney" <[EMAIL PROTECTED]>
> Date: 2004/09/27 Mon PM 04:27:41 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Repeater Controller
> 
> Ok... I'd like one to run a  42 Mcsr, 146 mcs, 225 Mcs, 444 Mcs, and a
> 900 pluss a remote base.
> 
> Ed
> 
> Paul Guello wrote:
> 
> >  Ed,The Link RLC-4 is a 4 port controller, I don't think NHRC has
> > anything like that.Paul
> >
> > "Mr. Edgar McKinney" <[EMAIL PROTECTED]> wrote:
> >
> >  Do they have a controller like the LINK's RLC-4?
> >
> >  Ed
> >
> >  Paul Guello wrote:
> >
> >  > Have you checked out the inexpensive controller kits
> >  > from NHRC? They may have more features than you need,
> >  > but they are easy to build and small.
> >  >
> >  > http://www.nhrc.net/
> >  >
> >  > Paul, KB9WLC
> >  >
> >  > --- goreks2000 wrote:
> >  >
> >  > > Hello
> >  > > I want to build a simple repeater controller to have
> >  > > as a portable
> >  > > repeater along wit my Motorola HT800 (407-435mhz)to
> >  > > use on small
> >  > > motor sports event but I don't find (I think I use
> >  > > one HT800 as RX
> >  > > and a mobile rig as TX ex yaesu FT7800)
> >  > > Any thing simple, most controllers have DTMF or CTSS
> >  > > in it
> >  > > The only thing I need is PTT opening (maybe 1750
> >  > > hz )
> >  > > And a Audio isolation/amplifier if necessary
> >  > > Can any one help me with building instructions
> >  > > Manny thanks and 73
> >  > > Göran SM1YCE
> >  > > Sweden
> >  > >
> >  > > Sorry for my bad spelling I hope you understand any
> >  > > way
> >  > >
> >  > >
> >  > >
> >  > >
> >  > >
> >  > >
> >  > >
> >  > > Yahoo! Groups Links
> >  > >
> >  > >
> >  > > [EMAIL PROTECTED]
> >  > >
> >  > >
> >  > >
> >  > >
> >  >
> >  >
> >  > ___
> >  > Do you Yahoo!?
> >  > Declare Yourself - Register online to vote today!
> >  > http://vote.yahoo.com
> >  >
> >  >
> >  > Yahoo! Groups Links
> >  >
> >  >
> >  >
> >  >
> >
> >
> >
> >
> >
> >
> >  Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> > ---
> > Do you Yahoo!?
> > Yahoo! Mail is new and improved - Check it out!
> >
> >
> >
> >
> >
> >
> > ---
> > Yahoo! Groups Links
> >
> >* To visit your group on the web, go to:
> >  http://groups.yahoo.com/group/Repeater-Builder/
> >
> >* To unsubscribe from this group, send an email to:
> >  [EMAIL PROTECTED]
> >
> >* Your use of Yahoo! Groups is subject to the Yahoo! Terms of
> >  Service.
> >
> 
> 




 
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Ok... I'd like one to run a  42 Mcsr, 146 mcs, 225 Mcs, 444 Mcs, and
a 900 pluss a remote base.
Ed
Paul Guello wrote:
 Ed,The Link RLC-4 is a 4 port controller, I
don't think NHRC has anything like that.Paul
"Mr. Edgar McKinney" <[EMAIL PROTECTED]> wrote:
Do
they have a controller like the LINK's RLC-4?
Ed
Paul Guello wrote:
> Have you checked out the inexpensive controller kits
> from NHRC? They may have more features than you need,
> but they are easy to build and small.
>
> http://www.nhrc.net/
>
> Paul, KB9WLC
>
> --- goreks2000 <[EMAIL PROTECTED]>wrote:
>
> > Hello
> > I want to build a simple repeater controller to have
> > as a portable
> > repeater along wit my Motorola HT800 (407-435mhz)to
> > use on small
> > motor sports event but I don't find (I think I use
> > one HT800 as RX
> > and a mobile rig as TX ex yaesu FT7800)
> > Any thing simple, most controllers have DTMF or CTSS
> > in it
> > The only thing I need is PTT opening (maybe 1750
> > hz )
> > And a Audio isolation/amplifier if necessary
> > Can any one help me with building instructions
> > Manny thanks and 73
> > Göran SM1YCE
> > Sweden
> >
> > Sorry for my bad spelling I hope you understand any
> > way
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> > [EMAIL PROTECTED]
> >
> >
> >
> >
>
>
> ___
> Do

[Repeater-Builder] 420 linking info needed

[hwstar]

Being out of the repeater scene for the past 7 years or so,
I need an update on what the best practices are for implementing full duplex 
420 links. i.e. What works best, what is easiest to find surplus.

What radios are especially suited to implement a 420 full duplex link? I know 
that Mitreks are good provided you use 4 radios, but they are hard to 
find/expensive in the government version. 

I implemented a low power full duplex 420 link for a local repeater club 10 
years ago using Kendecom UHF receivers and transmitters and 2 mobile duplexers 
which worked quite well, but the Kendecom modules are costly and they don't 
attain  the performance that Motorola or GE have.

Has anyone used the 6 cavity mobile surplus duplexers by Sinclair and Celwave 
which have SMA connectors which occasionally show up on Ebay sucessfully? How 
successful has anyone been using mobile duplexers for linking when you have a 
30 watt transmitter?

Steve 





 
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Re: Re: [Repeater-Builder] DB-406 450-470MHz how useful on 440-450MHz?

[hwstar]

It is a folded dipole. I just checked Andrew's web site it is like the DB-411. 

I didn't know folded dipoles were so broad at these frequencies. I guess the 
next thing to do is test it out
with and SWR meter.

Steve
WA6ZFT

> 
> From: "Chuck Kelsey" <[EMAIL PROTECTED]>
> Date: 2004/08/09 Mon PM 05:32:44 EDT
> To: 
> Subject: Re: [Repeater-Builder] DB-406 450-470MHz how useful on  440-450MHz?
> 
> Maybe the 406 is an older model, my catalog doesn't show it. What type
> antenna is it? If it's a folded dipole array, you should be able to use it
> as is.
> 
> Chuck
> WB2EDV
> 
> 
> 
> - Original Message - 
> From: <[EMAIL PROTECTED]>
> To: 
> Sent: Monday, August 09, 2004 4:02 PM
> Subject: [Repeater-Builder] DB-406 450-470MHz how useful on 440-450MHz?
> 
> 
> >
> > Regarding a DB-406 cut for 450-470MHz:
> >
> > How effective is it if used in the 440-450MHz region unmodified?
> >
> > If performace is sub-optimal, can the elements be extended, and will the
> phasing harness need to be lengthened?
> >
> > If it can be  modified without being a labor of love, what's involved? (In
> your opinion whould it be a waste of time?)
> >
> >
> > Thanks,
> >
> > Steve WA6ZFT
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 

> 
> 
>  
> 
> 





 
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[Repeater-Builder] DB-406 450-470MHz how useful on 440-450MHz?

[hwstar]

Regarding a DB-406 cut for 450-470MHz:

How effective is it if used in the 440-450MHz region unmodified? 

If performace is sub-optimal, can the elements be extended, and will the 
phasing harness need to be lengthened?

If it can be  modified without being a labor of love, what's involved? (In your 
opinion whould it be a waste of time?)


Thanks,

Steve WA6ZFT








 
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Re: Re: [Repeater-Builder] A new way to link repeaters over the Internet.

[hwstar]

Bob,

I was able to get 3 out of the 4 UHF mitreks tuned to the ham band. The 4th one 
has a problem with the tripler on the receiver side. 

The linking software is coming along nicely. See 
http://zapatatelephony/app_rpt.html.

Steve
WA6ZFT

> 
> From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
> Date: 2004/07/19 Mon AM 11:32:58 EDT
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] A new way to link repeaters over the Internet.
> 
> 
> how is it working ? did the mitrek tune up for you? .bob
> 
> 
> The best thing to hit the Internet in years - Juno SpeedBand!
> Surf the Web up to FIVE TIMES FASTER!
> Only $14.95/ month - visit www.juno.com to sign up today!
> 
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[Repeater-Builder] UHF Mitrek RX Multiplier Tuning

[hwstar]

I'm running into a problem tuning the receiver multiplier on
a UHF Mitrek chassis number HUE1002. I can't get an increase in M6 when tuning 
L7, instead I get a dip. The receiver was in working order before I preset all 
the coils per the tuning procedure. L102 and L104 are tuned to maximum 
deflection and appear to be acting as the procedure states.
I only saw only one peak on L102/104.

Are the peaks very sharp and fast on L7? i.e. less than 1/16th of a turn.

The tuneup procedure says to preset L7 and L8 to 9/16 from the top of the nut. 
Is this also correct for a Mitrek tuned to the ham band?






 
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