Thread: Quad 33 woes
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Old 25th Jan 2022, 10:13 am   #12
Craig Sawyers
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Join Date: Nov 2010
Location: Oxford, UK.
Posts: 4,941
Default Re: Quad 33 woes

The volume control with mains switch always fails with the mains switch failing. It did on mine. I suspect the contact snubber fails, and then the contacts erode.

I replaced it with one from Quad itself and the volume tracking was all over the place. I returned it to Quad for a refund and sent the tracking data to them.

The replacement looked nothing like the AB original. The original tracking was incredibly tight - and fortunately I did not toss it out.

What I did was lurk on eBay until I saw a NOS mono 1M AB pot with an identical mains switch, that cost hardly anything. I transferred the switch from that to the original pot.

Then I bought a new snubber from Farnell (the most expensive part of the exercise) and wired that it.

Problem sorted.

Craig
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