[EdHolland]

Arran,

Thanks - yes certainly the Candohm is still on the watch list... Some time watching the voltages it provides, and also monitoring what is happening to the AGC should tell all. At the moment volume reduced, it sounded as if AGC had suddenly increased its action, but it could also be a bias problem. Careful measurement will provide answers. The 6F6 runs at a fixed bias from the Candohm.

Actually I like this stuff - one really learns how the circuits work in practice, and see the things that can go wrong, and the symptoms they present.

Cheers,

Ed