IMPORTANT: These drawing and notes are provided for interest only and are not guaranteed to be accurate. Use at your own risk and discretion. The equipment shown contains lethal voltages and should only be worked on by people with suitable training and experience. Schematics and layouts are typical but will vary.
Hope you have fun sorting through this lot and that you find something useful. There are bound to be some typo's and wiring mistakes, but it's all free, so no complaints.
It's worth remembering too that some of this stuff has been around for sixty years and, meantime, there have been a lot of changes. Don't expect one drawing to cover all of the variations that crop up.
PLEASE Be Careful !
Old, beaten-up sound equipment often has a lot of hidden faults and messing with it can be dangerous (especially for the next poor bugger who has to use it). Repairs and mods are best left to somebody who knows what they’re doing (see the top of the page).
