Working from memory, I belive you're on the right
track. Also keep in mind the COS output on the
TKR-720/820 repeater is not a complete or true
logic transistion.
In short, the voltage on the COS pin doesn't go
from zero to +12 volts or the converse. The level
was something wacky value. I ende up making a
level shift comparitor circuit, which detects the
COS pin voltage change between no signal and a valid
signal condition.
I actually am in the process of having the circuit
made into small boards, which I hope to offer up
for sale pretty cheap... so others don't have to
scratch their head to figure out a circuit.
If you try to fudge something onto the COS pin,
which exceeds the max value for the controller
board logic, you take the chance of having the
circuit go on vacation (fail). The repair of said
damaged board will not be easy or fun.
skipp
> "N9WYS" <[EMAIL PROTECTED]> wrote:
> Not yet. I was previously working on getting one, though...
>
> I found a sheet with the pinouts for the accessory connector, but I
don't
> see a COR listed there... Maybe it's Pin 13 (Shown as "CO")??
>
> Mark - N9WYS
>
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