[arm-allstar] TXONDELAY needed

[Roger Coudé]

 The maxtrac I have does not have the 16 pin connector in the back.It is a 5 pin connector.Ptt and mic audio are accessible only in the front mic jack.The interface you suggest would not resolve the issue I have anyway.The problem is deep inside the radio, at firmware level.I can reproduce the problem using a simple mic.As soon as I release the ptt a fraction of a second, the power goes down until the ptt is released for a certain time.73Roger
    Le dimanche 10 février 2019 22 h 08 min 55 s HNE, Danny K5CG via ARM-allstar <arm-allstar at hamvoip.org> a écrit :  
 
 You might consider a "RIM-Maxtrac-RM" (RM=Repeater Maker). http://www.repeater-builder.com/products/usb-rim-lite.html Yes it's $60 but it makes life easier.

Simplifies the interface for simpleusb and usbradio modules out of the box.

Danny


----- Original Message -----
From: "ARM Allstar" <arm-allstar at hamvoip.org>
To: "ARM Allstar" <arm-allstar at hamvoip.org>
Cc: "Roger Coudé" <ve2dbe at yahoo.ca>
Sent: Sunday, February 10, 2019 6:09:06 PM
Subject: [arm-allstar] TXONDELAY needed

I have a few old Motorola Maxtrac that I use in pair to build VHF repeaters.
For the Rx side, I remove the power amplifier, and feed directly the RF to the Rx front end input.
That makes a very good receiver.
For the transmitter, I use the front jack to feed ptt and tx audio.
All with cooling fan and limited power for continous duty.
Everything goes fine, but once in a while, the transmitter just ignores the ptt.
Using a mike, I realized that a short outage in the ptt inhibits the tx power until ptt is released.
I have a solution in mind with gates and delays, but a software solution would indeed be much more elegant.
So the problem happens if remote or local activities create a small glitch on the TX ptt line.
Is it possible, as you did so well with the negative RxOnDelay parameter, that just after the ptt is
released a similar delay would detect ptt release and block the next ptt activation for half a second or so.

In other words, if the ptt reaches the end of the squelch tail, there would be a forced short silent period.
73
Roger
VE2DBE  
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