Hi Dave,

O.K on the encoder, did you manage to get it to go up by one, even though it has two steps for one turn? or does the cap R/C take care of this.

Yes when the receiver goes I will, it uses a commercial VCO module which is custom made so you would need to insert your own design. The front end is fairly standard, using BF998 RF and IF, BB814 varactors and toko SMD coild. The 21.4 IF has a 25 khz 8 pole filter, the receiver chip is the toko 10931V. These were chosen because they had AM, and the receiver tunes 118 to 137 mhz as well.

Cheers

Nigel