Have you started with the basics and checked the power supply for proper voltage, regulation under load, and AC ripple?
Joe sdenny61 wrote: > Hello all, > > This is my first post to this website, and I must say, I have found a vast > amount of great information here. Please continue your great work and thanks > to all! > > Here is the situation, I have a Spectrum SCR-1000 220mhz repeater. The > transmitter is very noisy (spurious) that is causing us lots of problems. > What we're thinking is the newer ICM crystal is actually overdriving the > first multiplier stage, cuasing problems on down the line. The tuning coils > on the 1st stage have very little if any response. The repeater is located > at my QTH for testing and tuning purposes. When transmitting, it wipes out > my TV, VHF, and 6M receivers, so it is pretty broad. > Our thought in solving this overdrive is to "knock down" the crystal by > placing a resistor (10K or so) in series with the crystal. Has anyone else > experienced this or a similiar problem? Any ideas or suggestions, short of > replacing the transmitter with something newer. > Oh, and the PA was removed from the transmitter box and placed in it's own > shielded enlosure to eliminate some problems we thought it was creating, so > that is/can be bypassed, we are sure it is the actual transmitter/exciter > board causing the problems. Thanks all! > > 73 de Steve KD8BIW > [email protected] > www.kd8biw.com > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > >
