Not much progress to report. But I have been thinking about the filter frequency. Here is my latest idea: Maybe I'll build the VFO in the 5 MHz range. This would allow me to use the 9 MHz Yaesu filter (and associated crystals) that Steve Smith sent to me (see above). With this I could be on 75 and 20 meters. I could build another filter at 13 MHz and, using the same VFO in the 5 Mhz range, get on our beloved 17 meter band. I kind of like the idea of plug-in filters. You can see my ideas for the board layout. I'm thinking of a Doug DeMaw Universal Hartley VFO inside the box shown above. The tuning cap you see is out of an old Heath QF-1 Q Multiplier. It has a very nice reduction drive built into the tuning shaft. It measures 19 to 148 pf.
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