At 12/7/2006 14:06, you wrote:
>Re: how to build a very simple repeater controller
>
> > How about using good ol' op amps? I like that approach because
> > almost the entire basic controller can be implemented using a
> > single chip: 2 op amps for hang time & TOT, 2 left for audio
> > processing.
skipp025 wrote:
> Hi Bill,
>
> It's a pretty good dollar value for an easy ID'er option. I
> built and installed one in a UHF Repeater. The major pain is
> the audio output (speaker) line is pretty much square waves
> so you should consider a low pass filter. Even a simple rc
> filter circuit
At 12/7/2006 10:54 AM, you wrote:
>It normally takes two 555 timer chips for a basic cor function. One
>timer is set up to add tx tail/hang time and the other to ensure
>the exceeded tx time-out time function shuts the transmitter down.
>A lot of people get cheap and replace the tail timer with a
For once and for all, 10 years ago I would have cluged together a simple COR
circuit with a hang time capacitor for keying and hook loudspeaker audio to
mic input thru a pad - NO MORE.
BUY a simple controller from any of a number of places check the internet -
do a google search - hook it up accor
: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: how to build a very simple repeater
shame_you_promise wrote:
> thus any body here has a schematic diagram of transistorized repeater
> controller just to key the ptt and mean from audio signal to key the
> pttemail
shame_you_promise wrote:
> thus any body here has a schematic diagram of transistorized repeater
> controller just to key the ptt and mean from audio signal to key the
> pttemail me [EMAIL PROTECTED]
this guys starting to sound like a troll. I can't even tell what he's
asking...
--
Jim Bar
Hi from Adam Kb2jpd
You can do a real simple repeater controller using some 555/556 timing
chips in monostable mode.Look at any Forest Mimms 555 cookbooks. He
did quite a few decent circuits.
As for the ID timer requirement, You can get any 1200 packet TNC that
has morse code ID that you can prog
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