Pioneer SA8800 restoration

Pioneer SA8800 restoration
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[@JD-lk7im]

Great looking amplifier. Nicely done sir.

[@joseagustinrodriguezteixei2116]

I have one and since 1978 i only have cleaned the selectors and potentiomenters. The sound is very good. Never changed capacitors or transistors. Nice restoration. Thank you.

[@Klobbrax]

I have the 7800 version which has fewer knobs and switches but still works well. Looks like wire-wrapping was used in this amp too. Interesting thanks.

[@ludtr365]

Krásná práce,mohu se zeptat na kolik taková oprava výjde?

[@tysimon]

Take no offence, I watch a lot of restoration videos of amps, this is an extremely well done repair, but not a restoration. For that you would have needed to disassemble everything, clean up (especially those dirty boards) and re-assemble. I still love the video though !

[@1sostatic]

The boards did get alchohol cleaned and dissassembled enough to gain access to replace ALL transistors. I's not a car going into a spray shop. thx

[@tysimon]

@@1sostatic well thanks for clarifying that, appreciated. :) Btw, a question. What's up with those rolled wires on a pin ?? I saw that on an older Denon amp and now this one. Is not that gonna oxidase on long term, and potentially cause noise ? Since I saw on two different brands already, I guess it was the way to do it back in those days...

[@1sostatic]

@@tysimon There are a many brands that use that wiring technique and a lot has stood up to the 50 years of life. Some, if over corroded and brittle - engineers need to make the choice to resolder/rewire. Especially if multiple engineers have been in prior. ... As for "cause" of noise... chemistry degradation in capacitors , transistors, resistors that have left their original values...etc., are a far bigger contributor to noise; along with product failure, gain and bandwidth issues, than wiring.

[@tysimon]

@@1sostatic very interesting, thank you 👍👍