[arm-allstar] PTT Delay idea

Doug Crompton wa3dsp at gmail.com
Tue Mar 5 02:00:02 EST 2019


 I think you contradict yourself because you want audio to level before PTT
but you tell people to hold PTT for a few seconds before they talk. That
does not make sense. Then there would be carrier without audio. What is
this ALC? A good audio limiter/compressor should be almost instantaneous in
response. Are your levels really that wacky? Perhaps the users need to set
their levels better! You could delay PTT any amount you want with a rather
simple circuit but remember you are cutting off the beginning of the
transmission by that amount.

On a side note we will be introducing a new channel driver later this year
that will allow you to use a SW limiter/compressor with custom settings.

*73 Doug*


*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*

On Mon, Mar 4, 2019 at 7:50 PM "John Griffith via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> I was wondering if there's a way to delay PTT for 200 milliseconds (but not
> the audio stream) so that my ALC can properly level out before anything is
> heard on the repeater?  The people on the repeater network I'm on are
> pretty
> good about holding the key down for a second or 2 before talking, so it
> would be a big deal.
> Another option I was thinking about would to have a tone or white noise or
> anything really.. keep the ALC circuit busy and leveled during times of
> non-transmit.  Anyone have an idea?  I already have a burst of noise at the
> very beginning of the repeater ID, I would just want that to be during the
> 200ms.
> John
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