Brian Reay wrote:

Comments noted Brian, especially when I think back to the repairs and
modifcations I used to do with analogue satellite receivers both for SAT
TV and ATV use. Just need a steady hand and fine tip and plenty of patience.

As regards the DSP side, if that goes bad the repair is probably more
hardware related (ie a bad component) so the firmware doesn't really come
into it. I've not checked, but some of the DSP radios may well use one of
the "off the shelf" DSP devices that you can get the development environment
for. If so, you could write your own code- assuming you Know what you are
doing.

Fortunately I prefer non-DSP radios and ones where I can effect a simple
repair - especially Icom 735 and Yaesu FT747 - simple and reliable sets
and very flexible and forgiving with non-fancy aerial systems unlike
some modern sets that 'freak out' when a high SWR is presented.

Thinking of adding DSP to the 747 sometime or maybe trying a PC based
real-time solution.

Leigh...