Need info on getting COS/COR Out of an HT600

ag4uw · Post by **ag4uw** » Mon Feb 13, 2006 5:51 pm

Hi Group

Can anyone tell me how to get COS/COR out of an HT600.

Thanks Freddy

kcbooboo · Post by **kcbooboo** » Thu Feb 16, 2006 5:32 am

There is a Carrier Detect signal (+5V with carrier, 0V with no signal) that comes out of the IF board, but it goes only to the microprocessor on the controller flex, and I don't know how you'd get to it from that point.

For what it's worth, J6 pin 9 on the controller flex has this signal on it.

Bob M.

kb0nly · Post by **kb0nly** » Thu Feb 16, 2006 9:17 am

You can get the carrier detect signal to the outside world, i built a small portable repeater out of two HT600's once. The problem is that you can't put any load on that line to the controller, it goes to +5v with a signal.

I used a simple circuit to take the high going signal and switch the PTT of the other radio. I'll see if i can find my notes on it, i think i just used a 2N3904 and a pull up resistor to B+ to switch another 2N3904 on the opposite radio to pull it's PTT to ground.

It was a finicky setup though, if the voltage on the carrier detect line dropped more than .3v then the controller wouldn't always unmute the receiver.