I've never found them difficult to tune at all. I have, however, needed to change some caps to get them to go where I needed them. Sometimes they will go without modifications, not always. If you cannot get a "true peak" when tuning a stage, a cap needs changed. A true peak is one that while tuning, you reach the peak and can keep going and come down the other side.
The probe trick for the receiver, I believe, is suggested in the manual. Chuck WB2EDV ----- Original Message ----- From: Jim Brown To: Repeater-Builder@yahoogroups.com Sent: Saturday, January 17, 2009 10:19 AM Subject: Re: [Repeater-Builder] Lunch Box Radio I have recently moved a GE Mastr Exec II radio from the 47 mHz area up into six meters. (The MVP and the Exec use the same exciter). I'll admit that the exciter is hard to tune, but it will work without any modification. My technique is to set the frequency of a receiver to each multiplier frequency and place a probe near the stage while tuning. With a peak in signal strength, the stage can then be tuned with a meter on the test point. I built a probe that I use with a one inch piece of insulated wire extending from the end that I can insert into the exciter near the stage I am trying to tune. This same probe works to insert a signal generator output into the individual stages of the front end of the receiver. Tune the mixer first and then work toward the input one stage at a time. 73 - Jim W5ZIT
