Re: MSR2000 transmit spike With a copy of the Service Manual in hand... do a complete new equipment alignment of the exciter board. This means you preset all the coils and the output filter adjustments to the heights indicated in the manual charts for your specific frequency.
This sort of thing happens a lot when people do a tweak peak adjustment of an already working transmitter/exciter. Some stages are by default properly aligned first for a meter dip indication while others are peaked. Fudging the alignment using the tweak and peak method is as often demonstrated by people in a hurry... is not a good thing. cheers, skipp > Bill Photinos <[EMAIL PROTECTED]> wrote: > > I have a MSR2000 repeater that transmits on 171.350mhz. We are seeing > a transmit spike at 157.072mhz. It is strong enough to break squelch > 10+ blocks away with legible copy on the spike frequency. We > disconnected the PA and connected the duplexer directly to the exciter. > The spike seems to be coming from the exciter itself. Would anyone have > any suggestions on where to look on the exciter board to fix this short > of installing a notch filter between exciter & PA? I haven't yet > checked across the band for other spikes with a spectrum analyzer but I > fear there may be other spikes as well. > > Thanks for the help! > > Best Regards, > Bill - W4RVN >
