This is the first revision of the RTTY/AFSK interface board. It was fully functional but had room for improvement. This document shows details of the first revision.
The PCBs for this revision were blue only. Thus if you got a blue PCB from me, you have the first revision board.
For the full schematic description please refer to readme.md.
The PCB was designed using KiCAD software as a simple two-layer board with through-hole mounted parts.
Solder mask was made blue in order to match the color of the enclosure box.
The design uses through hole parts which make PCB assembly quite simple.
I have never completed drilling the front and the rear panel of the box, thus the device has never been fully assembled. The second revision has front and rear panels made of PCB, making the assembly process much simpler.
The following photos show that the PCB perfectly fits in the chosen box.
