G0BSX BSX2 packet radio

Posted on Feb 4, 2014

Once packet radio started taking off, the limitations of my first foray into AX25 with the `BSX1` TNC became evident. It supported AX25 version 1 only and was limited in its IO capabilities. The command set was also `non standard` due to the almost universal acceptance of the TAPR TNC2 command set for BBS and terminal programs. I therefore decided to `clone` the TAPR TNC2.

G0BSX BSX2 packet radio
Click here to download the full size of the above Circuit.

I wanted a smaller simpler board with easy to source components. Once I built my prototypes, others became interested and, as a result, I made the boards available at cost to the amateur community. Some 4500 BSX2 boards were built and it formed much of the networking backbone of the UK packet radio network.

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