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
__________________
Doomed for a certain term to walk the night
|