OK! thanks Russ, that makes perfect sense. I will try that this evening. 73's Henry
--- In [email protected], "Russ Crisp" <[EMAIL PROTECTED]> wrote: > > Hello Henry. > > > > I believe the COS on the GM300 is active LO. Open collector.. Try using > something like a 10K pull up resistor tied back to 12v. Then, when the > receiver hears a signal, the voltage at the junction of the 10K and pin > 8 should go from 12v to near 0. Set the ICS controller to use active LO > COR. > > > > Hope I'm reading you right here. > > > > 73's > > Russ > > K4RCC > > > > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf Of Henry Harms > Sent: Saturday, January 26, 2008 4:18 PM > To: [email protected] > Subject: [Repeater-Builder] COR on GM300 8 channel reciever > > > > I have inherited a GR300 UHF repeater reprogrammed to 440 ham bands, > and I am trying to set up a ICS Basic controller. The RIC box was hit > by lightening and blew four of the IC's into little pieces. The radios > seem to be working fine. They receive and transmit as expected but, I > don't seem to have COR on pin 8. Voltage stays at 0 either way. This > is my first attempt at building a repeater. Can't seem to find > anything in the service or operators manual as to how much voltage > should be present on pin eight and I am guessing that it is broke, I > hope not as a ham in Missouri we could use a UHF machine linked to the > Interlink for emergency use. Any help would be appreciated. Thanks in > advance. > > KB0ROX Henry >
