Twin (Reverb- popping/ rustling: noises).

[Sea Chief]

Yes pull V3 out and see if noise persists. If the noise is just the same then that rules out the drive side including transformer, valve, valve socket etc.

Could it be that the noise is there without reverb but just not all that intrusive? Reverb does sort of amplify / emphasise pops due to the decay. One obscure source of this can be loose UK mains plug wiring securing brass screws. A 78 amp will surely have an ancient mains cable.

V3 pulling results just done/ above (I don't know the significance of them, so waiting on G1's response).

I'll certainly peep at my mains plug brass screws, & report back.


Thanks for your input. Capt

[Sea Chief]

mikeydee77 All 3 mini brass screws tight in the plug, & wires secure, fuse secure. Old fuse mind you.

Capt

[g1]

pulling V3 (with the reverb ftsw plug removed so I know it's in ON mode)... mild amp hum only.

Turn the Reverb knob from 1 to 8 like so, & no change at all. Nothing nasty. Quiet amp. Just the mild hum.

So the V3 drive side of the circuit seems to be responsible. Changing the eyelet board and all of it's components eliminates most of the circuitry as suspects.
The only things on the V3 side of the circuit that haven't been changed (that I can think of) are the V3 socket and the reverb drive transformer. I'm leaning toward the transformer.
As far as transformers go, they are not expensive.

[Chuck H]

So the V3 drive side of the circuit seems to be responsible. Changing the eyelet board and all of it's components eliminates most of the circuitry as suspects.
The only things on the V3 side of the circuit that haven't been changed (that I can think of) are the V3 socket and the reverb drive transformer. I'm leaning toward the transformer.
As far as transformers go, they are not expensive.

I know I brought it up, but... Sea Chief has had some success cleaning sockets bofore. Less so lately and I think he's cleaned them repeatedly. I still question the socket but in my own experience bad socket connections reveal themselves very apparently. You can wiggle the tube in the socket with the amp in operation and if the contacts are bad it should reveal itself. What's left after that is the reverb transformer.

My concern is that Sea Chief tends to be a little jumpy about initiating intermittent contact failure because it's loud and unnerving. So, Sea Chief, are yo up to it? Wiggle and thump on the reverb drive tube in it's socket and see if that does or doesn't make it misbehave...