On 24-02-17 15:00, Adrian Caspersz wrote:

That's the type of project I like. Heresy, some say ;-)

Thanks - I've tried to minimize the heresy by keeping the
old circuitry intact as much as possible, and ensuring
all changes can be undone (basically reconnecting leads
to speakers, switches and potentiometer.

Got any pictures? Incidentally, this stuff does well on YouTube.

I keep intending to take pics, but always run out of round tuits.
I'm not a YouTube person, but the power-up might be worth it...