Clint-Green
Hey all,
I have a Peavey Valveking 212 all valve combo that decided to give up the ghost on me a few months back, haven't had the time or moola to take it in to a tech yet but what happens is I switch it on, works fine for a few seconds and then loses sound (sort of like someone is turning the volume down until there's nothing). I've tried this a few times watching the power amp tubes at the back and they glow for a few seconds then suddenly go dimmer until they're completely dead (volume disappears with the glow, obviously). I've tried swapping them out one by one with a spare that I had lying around but no luck, so I'm assuming that it's not a bum valve that's causing the problem.
Initially, it would hold volume and "valve glow" for a few minutes before crapping out but over the course of a few days that time reduced to a few seconds so now by the time I've allowed the tubes to warm up and hit the standby switch, the thing is dead as a doornail. I haven't tried using it since December or so when the problem started becoming worse and worse. Any ideas??
AlanRatcliffe
Sounds like a power supply problem. Tech time...
Clint-Green
Argh, I feared as much...the power LED remains on and there is still a faint hiss coming through the speakers but I was thinking there may be a dry solder joint or something that moves when the amp heats up a little, cutting power to the power amp?
AlanRatcliffe
It might be a dry joint in the power supply - I've had that with Peaveys before.
Clint-Green
Fingers crossed it doesn't cost me an arm and a leg to have repaired :/ Thanks Alan!
Clint-Green
Hey Vella,
Not yet, I've poured a fair amount of cash into my RG570 project so it's going to be a while before I have spare funds to get the amp fixed (thankfully I don't have any gigs coming up for a while as this is my live amp). I'm not sure if it will be the power tubes though, I swapped them out one by one with a spare to test and I doubt that they would all be giving up the ghost at once (although stranger things have happened I suppose...) ?
VellaJ
Well I won't pretend to be an expert, but according to the article I read, the valves work in pairs, and will therefore die at the same time. Either in sets of 2 or 4... But yeah, when you got the funds, let us know what the problem was ?
Clint-Green
You may be right, Vella, the owner of the store that I bought the amp from about 5 years ago (not a tech but I'm sure he sees his fair share of repairs that go through the shop to the tech they contract out) also seemed to think that it was just the valves. I never knew that they usually go in pairs so that may well be the case. Shot for the heads-up! ?
