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Re: Windows 7 config

 

Correct, we're not talking about repeaters here. We are taking discriminator audio to the sound card interface for decoding, and sending modulated data from the sound card to the modulator. Obviously if you set the transmit gain too high you will cause interference on adjacent channels. And it will also destroy the data being sent, so a really bad idea.

This discussion would be better handled on the Winlink and Vara forums:

/g/VARA-MODEM/topics

-Scott, NS7C
Re: UHF Cans?

 

Looks small enough to be UHF. I can verify when I get home tonight.
That would be great! Thanks Jeff.

Tedd, VE3TJD
Your pic appears to be a UHF loop. Measuring one out of a 10" UHF cavity I have here, from the loop plate to the bottom of the loop is about 1.05" (about 1-1/16"), outside width of the loop is about 0.62" (about 5/8").

If you don't have a use for those, let me know, maybe we can trade for something you need.

--- Jeff WN3A




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Re: Windows 7 config

 

¿ªÔÆÌåÓý

He¡¯s using the radio for Winlink/VaraFM, not a repeater.? Data, not voice.

?

?

From: [email protected] <[email protected]> On Behalf Of Chris Boone
Sent: Tuesday, November 1, 2022 1:29 PM
To: [email protected]
Subject: Re: [repeater-builder] Windows 7 config

?

?

I strongly disagree Scott... That's a recipe for disaster. Feeding wide band unsquelched noise to a modulator will cause the transmitter to over deviate. Remember the squelch noise out of a discriminator is half the bandwidth of the IF filter which means you have audio at 7.5 khz + coming out of the receiver.. Anytime I run flat audio, I always put a clipper/limiter circuit in line to prevent over deviation, and also to limit the audio bandwidth to 3 kilohertz maximum. Under FCC part 97 rules we are required to make sure that we use good engineering practices. Running raw discriminator audio straight into a transmitter modulator without any processing violates that rule. I've done that in microwave systems but that's a special case and you have the bandwidth to do it. In the crowded VHF/UHF bands, it's totally ludicrous to do so

?

Chris

WB5ITT?


That's the key here: Bypass as much of the radio's internal audio circuitry as possible - raw discriminator audio out, TX
audio directly to the modulator.

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 1553


Virus-free.
Re: Windows 7 config

 


I strongly disagree Scott... That's a recipe for disaster. Feeding wide band unsquelched noise to a modulator will cause the transmitter to over deviate. Remember the squelch noise out of a discriminator is half the bandwidth of the IF filter which means you have audio at 7.5 khz + coming out of the receiver.. Anytime I run flat audio, I always put a clipper/limiter circuit in line to prevent over deviation, and also to limit the audio bandwidth to 3 kilohertz maximum. Under FCC part 97 rules we are required to make sure that we use good engineering practices. Running raw discriminator audio straight into a transmitter modulator without any processing violates that rule. I've done that in microwave systems but that's a special case and you have the bandwidth to do it. In the crowded VHF/UHF bands, it's totally ludicrous to do so

Chris
WB5ITT?


That's the key here: Bypass as much of the radio's internal audio circuitry as possible - raw discriminator audio out, TX
audio directly to the modulator.

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 1553
Re: Quintron Corporation / Glenayre 70cm pager transmitter & Power Supply. Need info.

 

Thanks Burt, probably wouldn't be too difficult to put in a PTT actuated relay.
I remember the old SoCal days, Neil, and others. Was in Simu Valley ARC, and we had a 440 machine on Oat Mountain. I was WB6CLE at that time. Now in WA near Seattle.
Frank N6CES


On Tue, Nov 1, 2022, 7:05 AM Burt K6OQK <biwa@...> wrote:
I may be wrong here, but I recall a lot of problems on Mt. Wilson, and other sites, to broadcast 940 MHz STL's as well as VHF radios from Quintron paging transmitters.? As I recall, it was when drive was removed from them that they would oscillate in the final stage.? The cure was to remove the amplifier's voltage when they were supposed to be off rather than leaving the amplifiers powered up and simply removing drive.

Burt, K6OQK

Re: Windows 7 config

 

Scott,

It will depend on the radio used. For most Mot. radios with the 16 pin connector, you don't need to do anything special in programming. For the CDM series with the 20 pin option connector, you need to plug the RIM into the center 16 pins and program the audio paths in and out for "flat" audio response.

That's the key here: Bypass as much of the radio's internal audio circuitry as possible - raw discriminator audio out, TX audio directly to the modulator.

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 15531

On 11/1/2022 9:27 AM, SCOTT READ wrote:
What do I need to do in the motorola programming software and Windows 7 to config the RIM-Maxtrac wit work with Winlink or Vara FM.
Re: VHF MTR2000 Poor Receive Performance

 

Cavity 1: -23DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -30DB IL/Notch at Reject Frequency
Cavity 2 (middle cavity): -30DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -30DB IL/Notch At Reject Frequency
Cavity 3 (closest to antenna port): -29DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -29DB IL/Notch at Reject Frequency
The return loss of the first cavity seems off. At 0.4 dB IL I would expect the match to be around -30 dB as you saw with the other two cavities. Is that the cavity that seemed to be giving you problems before?

So I found an old post on the group and found I do indeed have the high split harness.
I'm hesitant to write off all of the problems you experienced to the harness unless it is damaged. And I wouldn't go any further until seeing what's up with cavity #1.

Repeat the same exercise for the cavities on the transmit side.

--- Jeff WN3A



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Re: Quintron Corporation / Glenayre 70cm pager transmitter & Power Supply. Need info.

 

The boards look like those made by Aerotron. A definite blast from the past of the late 1970's version I used to maintain for hospitals in 160 mhz at multiple sites in NYC and CT. There were lots of them around on all bands and yes they were dirty.
For a real blast these were used with REACH pagers for the hospital paging. A 5 year LiOn battery life with sleep mode.
The ones I worked on were hi power 250 watt, and unfortunately I don't have any documentation from them. You might try looking at some Aerotron radio books of that era.
Re: Quintron Corporation / Glenayre 70cm pager transmitter & Power Supply. Need info.

 

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Yes, this series (QT6700??) were bad about intermod even with a good band pass band reject on them. I ended up figuring it was mixing in the exciter. It could come in if there was any spot on the cover that was not making perfect RF seal (they never did) or even coming in on the leads coming into the back of the transmitter if it was strong enough. The pins on the board that held the channel elements would corrode and bad about causing intermod problems.

If you are only using the PA, you should have a lot fewer problems. I might still have a spare PC somewhere in the junk. Also a quiet site without all of the IMTS, paging, and other constant on high power stations will be a great help!



On 11/1/2022 9:05 AM, Burt K6OQK wrote:

I may be wrong here, but I recall a lot of problems on Mt. Wilson, and other sites, to broadcast 940 MHz STL's as well as VHF radios from Quintron paging transmitters.? As I recall, it was when drive was removed from them that they would oscillate in the final stage.? The cure was to remove the amplifier's voltage when they were supposed to be off rather than leaving the amplifiers powered up and simply removing drive.

Burt, K6OQK

Re: Connecting Yaesu DR2X Repeater to Raspberry Pi/Allstar?

 

Is anyone still making outboard CTCSS encode and/or decode boards? CommSpec?

On 11/1/2022 10:16 AM, Larry Macionski via groups.io wrote:
On Mon, Oct 31, 2022 at 03:25 PM, Kevin Custer wrote:


The SC-50 and CT-30 are discontinued because the encoder/decoder IC in no
longer available.
Well, a year ago I codgered up substitution an Arduino Nano ($5) for the CTCSS encoder the DR2X requires if in the remote mode.
I have the "script" you down load to the Aurduino and it outputs a PL tone.? I'd have to do some digging to find my notes but If anyone is interested it's pretty simple. The output pin of the Arduino simply needs a capacitor coupled to a potientiometer then the wiper capacitively coupled to the to the CTCSS input pin and set the level.. The sine wave resulting doen't look bad at all..
Re: Connecting Yaesu DR2X Repeater to Raspberry Pi/Allstar?

 

On Mon, Oct 31, 2022 at 03:25 PM, Kevin Custer wrote:
The SC-50 and CT-30 are discontinued because the encoder/decoder IC in no longer available.
Well, a year ago I codgered up substitution an Arduino Nano ($5) for the CTCSS encoder the DR2X requires if in the remote mode.

I have the "script" you down load to the Aurduino and it outputs a PL tone.? I'd have to do some digging to find my notes but If anyone is interested it's pretty simple. The output pin of the Arduino simply needs a capacitor coupled to a potientiometer then the wiper capacitively coupled to the to the CTCSS input pin and set the level.. The sine wave resulting doen't look bad at all..
Re: Windows 7 config

 

I can't answer myself, but I know you will need to be more specific. What radio? What software?

On 11/1/2022 9:27 AM, SCOTT READ wrote:
What do I need to do in the motorola programming software and Windows 7 to config the RIM-Maxtrac wit work with Winlink or Vara FM.
_._,_._,_
------------------------------------------------------------------------
Groups.io Links:
Re: Quintron Corporation / Glenayre 70cm pager transmitter & Power Supply. Need info.

 

I may be wrong here, but I recall a lot of problems on Mt. Wilson, and other sites, to broadcast 940 MHz STL's as well as VHF radios from Quintron paging transmitters.? As I recall, it was when drive was removed from them that they would oscillate in the final stage.? The cure was to remove the amplifier's voltage when they were supposed to be off rather than leaving the amplifiers powered up and simply removing drive.

Burt, K6OQK
Windows 7 config

 

What do I need to do in the motorola programming software and Windows 7 to config the RIM-Maxtrac wit work with Winlink or Vara FM.
CSI-32

 

Are there any CSI-32 controller folks on here??? I have the manual but the factory reset is not working.
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Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
Quintron Corporation / Glenayre 70cm pager transmitter & Power Supply. Need info.

 

Hi folks, I have a 45w and a 90w 70cm? transmitter and power supply and need manual or any info. See pics.
Google showed install and setup manual for much later (Jan 93) VHF advanced version, but I think too different. QT-4500 series QT-6506 series.
I am only using the last stages of RF section being driven with a? CDM750. It's got a huge fan cooled heat sink to support 100% duty paging service. Running at about 80w and 75 watts out of the duplexer should stay cool.
Any thoughts are appreciated.
Frank N6CES

Screenshot_20221029-231507~3.png
Screenshot_20221029-225242~2.png
Screenshot_20221031-151905~2.png
Screenshot_20221031-155824.png
Screenshot_20221031-151842.png
Screenshot_20221031-151518.png

Re: VHF MTR2000 Poor Receive Performance

 

That's great news!
On Monday, October 31, 2022, 04:53:56 PM CDT, Jared Smudde <computerwhiz02@...> wrote:


Cavity 1: -23DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -30DB IL/Notch at Reject Frequency
Cavity 2 (middle cavity): -30DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -30DB IL/Notch At Reject Frequency
Cavity 3 (closest to antenna port): -29DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -29DB IL/Notch at Reject Frequency

So I found an old post on the group and found I do indeed have the high split harness. My harness is roughly 12.5 inches center to center of the Tee connectors. So I took 3 Amphenol tees and found some 14 inch RG400 jumpers and cabled it up and got 1.6DB of IL and was getting well over 105DB notch. No weird behavior like I was getting earlier with the high insertion loss and only 2 of the notch screws working. Look like I need a new harness and I should be good to go?

Re: VHF MTR2000 Poor Receive Performance

 

Re: VHF MTR2000 Poor Receive Performance

 

Cavity 1: -23DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -30DB IL/Notch at Reject Frequency
Cavity 2 (middle cavity): -30DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -30DB IL/Notch At Reject Frequency
Cavity 3 (closest to antenna port): -29DB Return Loss at Pass Frequency, 0.4DB IL at Pass Frequency, -29DB IL/Notch at Reject Frequency

So I found an old post on the group and found I do indeed have the high split harness. My harness is roughly 12.5 inches center to center of the Tee connectors. So I took 3 Amphenol tees and found some 14 inch RG400 jumpers and cabled it up and got 1.6DB of IL and was getting well over 105DB notch. No weird behavior like I was getting earlier with the high insertion loss and only 2 of the notch screws working. Look like I need a new harness and I should be good to go?
Re: Connecting Yaesu DR2X Repeater to Raspberry Pi/Allstar?

 

¿ªÔÆÌåÓý

On 10/31/2022 10:32 AM, Chris Smart wrote:

Someone asked me yesterday how to connect an Allstar node to a yaesu DR2X repeater, and mentioned they would like something plug-and-play. Is the best option?

That page mentions the DR1X. Will it work as well with the 2X?

?

Do we also need

?

Thank you in advance for any suggestions.

?

73,

Chris



"Best" is subjective.?

The problem with that solution currently is some of the required products are unavailable.? The SC-50 and CT-30 are discontinued because the encoder/decoder IC in no longer available.

Many folks are using "just" a RA-DR1X interface by itself with good results since the issues that MABEL corrected are no longer an issue with more recent firmware.

Kevin W3KKC
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