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I recommend putting the two resistors in parallel instead of in series as the picture shows above. Even though they are in series above, it still works. In this technique MV2104 varicaps are mounted on the main tuning capacitor. The MV2104's have worked very well. Two varicaps and two 100k resistors are mounted on the main tuning capacitor. The mounting is done on the tab side with round holes. The 100K resistors are connected to the cathodes of the varicaps and tied together on the other end to connect to the frequency stabilizer output. Note in the picture above that the cathode of the varicaps is attached to the stator of the capacitor. The two end sections of the main tuning cap are tied together for more capacitance. A jumper wire is used to tie the sections together. They are only tied together on this side. The connections to the stator on the other side of the capacitor are used to connect to the VFO. The output of the stabilizer (labeled relay on the stabilizer board) is connected to the two 100K resistors. |