BITX Build Update #19 Layout, VXO, Bal Mod, Filter, PA
The files of the BITX20 Yahoo group were very useful to me during my BITX build. So I have decided to make a contribution myself. I uploaded a few drawings today. Here is how I laid out the circuitry on my 8 inch by 11 inch copper clad board. I included the isolation (Manhattan) pads for one of the bidirectional amps.
Here is the VXO. I built is on a separate board, but I could have put it on the main board.
Here is the balanced modulator and crystal filter.
Here is the power amplifier circuitry. Amazingly easy to stabilize.
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