At 5/22/2010 21:10, you wrote: >I have a small amount white noise on the TX of a Micor repeater. It is >most noticeable in the hang time but it's not coming from the controller. >It's still there with the controller completely removed and pressing PTT >on the station control card. It's more noticeable on some radios, perhaps >radios with higher audio frequency response. > >Anyone ever run into this before? > >Tim WD6AWP
I never heard of this problem on a Moto radio, but the G.E.s will do this if the CG (PL) input on the TX is left unloaded. Somehow a bit of the RX's discriminator output leaks into the phase modulator. Apparently it has a very high impedance, as any load on it eliminates the problem. You might loading the PL input on the Micor & see if it has the same effect. Is this a VHF or UHF radio, & is it currently on the air? (I can probably hear it from here) Bob NO6B
