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Old 20th Jun 2022, 9:38 pm   #10
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,903
Default Re: Quad 303 pop on switch on

At least the 303 gives you the choice of how far to go.

Ideally, fault finding should get the problem down to one or more definitely faulty components. In this case you get the maximum info out of the repair, and learn the maximum eduction from it.

However, a lot of people can pull the transistors and replace them after testing,, but their concept of testing is a quick squirt on one of those little PP3 powered pocket testers that go nowhere near running currents and operaring stresses.

As general advice I sway towards a set of semiconductors as a way of avoiding the effort of looping around repeated failures.... The work in explaining and hand holding isn't insignificant either.

Too many people treat DC coupled solid state amplifiers as demonic on the unrepairability scale. Getting them going and not blowing their confidence is important.

David
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