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. 


Our book: "SolderSmoke -- Global Adventures in Wireless Electronics" http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20