I’m asked about these frequently, but there is no practical way for me to work on them due to the size. Working on them at your place is impractical, and I don’t have room for you to bring them here. Taking the components out of the cabinet and bringing just them is also impractical. If they are tube they require a lot of work to make them work reliably and safely. I’m not aware of anyone who does work on these in the Ottawa area either. If I ever come across anyone who works on these and does quality work, I’ll refer people to them.

I can usually setup my own guitars reasonably well, but there are many great luthiers in the Ottawa area that can do a better job at a better price than I’d be able to offer. I’m happy to recommend them. I have been known to occasionally to do electronic work on guitars though. I once diagnosed and replaced a bad capacitor in an active bass after the music store told the client he’d need a whole new circuit board and that board was not available.

I haven’t got into reel to reel yet. Maybe one day I will.

I don’t work on car audio equipment

Sorry I won’t resolder the board from your furnace even if you think it is simple, I can’t test it and therefore can’t guarantee it can be used safely.

Bluetooth speaker, Ipod dock, Bose Acoustimass, minature waterproof radio, many headphones. Stuff that isn’t really made to be repairable and I’m lucky if I can even get it open.

Antique tabletop tube radios. There’s lots of these from the 30s through the 60s.

This isn’t as clearly defined a category as other ones here, feel free to ask if you are unsure about a specific piece. I don’t work on anything with germanium (as opposed to silicon) transistors, and many pieces from before 1970.

Germanium semiconductors came before silicon, and were only in use very briefly before silicon, which is far superior, took over. Germanium transistors are much less reliable and cannot be directly replaced with silicon without modifications. So I can’t offer a reliable product at a price anyone is willing to pay when dealing with this gear. And these units were nothing to write home about sonically.
I’ve found even the pre-1970 silicon gear to be more trouble than it is worth too. This gear features weird designs, capacitors leaking visibly most of the time, toxic cadmium dust on the metal (this is as bad as asbestos!!), boards that take a lot of work to access, and more troubles. Total overhauls would be mandatory, and few people want to pay what it would cost to bring this stuff up to spec anyway.