Having previously posted about building the Pic-a-Star transceiver, and making my own PC boards, I thought I’d show you a work in progress. The two photos are of the band pass filter board. Originally, the design used through hole capacitors and slug tuned inductors in the filters, however the Toko coils used are no longer available (except as hard to find NOS), although some builders have salvaged usable ones from old CB sets and rewound them. I plan on using Toroids and trimmer caps, mounting these on daughter cards which will then be soldered to the BPF board instead of the Toko coils.
This photo shows the ‘track’ side of the board with parts for the first two banks of filters mounted. This board will perform the switching operation between filter banks, the actual filter parts to be mounted on daughter cards on the other side of this board.
And this is the back side of the board. Not much here; ground plane, pads where the daughter cards connect, and two bus lines for input and output.
The board was made using the process previously described using G3XJP’s artwork from the picastar project. The ‘tin’ plating on the board is just a very thin layer of solder applied to the board with a soldering iron (paste flux rubbed on the board first). This will help keep the copper foil from becoming tarnished. Wish I had thought of doing that on the first boards I made!