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Don’t you have to have the snubbers?SteveD wrote:Snip those silver 'Hunts' caps and discard for a kick off.
They're actually across the AC input to the recifier and just cause bother more often than not.Chris4189 wrote:Don’t you have to have the snubbers?SteveD wrote:Snip those silver 'Hunts' caps and discard for a kick off.
Do I need to replace them with anything or remove them and drive on?SteveD wrote:They're actually across the AC input to the recifier and just cause bother more often than not.Chris4189 wrote:Don’t you have to have the snubbers?SteveD wrote:Snip those silver 'Hunts' caps and discard for a kick off.
It's the first thing Marshall Service would do if they had it in. They are simply not required.
If you want to fit snubber caps. solder 1n/1kV polyester caps across each individual rectifier diode. Lose the Hunts caps asap. They may even be the cause of your issue.
Don't replace them with anything. It seems they were indeed the problem for pulling your HT voltage down.Chris4189 wrote:Do I need to replace them with anything or remove them and drive on?SteveD wrote:They're actually across the AC input to the recifier and just cause bother more often than not.Chris4189 wrote:Don’t you have to have the snubbers?SteveD wrote:Snip those silver 'Hunts' caps and discard for a kick off.
It's the first thing Marshall Service would do if they had it in. They are simply not required.
If you want to fit snubber caps. solder 1n/1kV polyester caps across each individual rectifier diode. Lose the Hunts caps asap. They may even be the cause of your issue.
That should be negative dc voltage on pin 5, not VAC by the way.Chris4189 wrote:Removed them and I’m back up to 500 volts pins 3 and 4 V4-V7 but I have no negative VAC on pin 5 on V4 and V5 :( V6 and V7 are both showing -39.8
I have an old quad of EL34’s on my work bench and just as I figured V4 and V5 red plated like a boss while V6 and V7 were fine.
I double checked and the grid leak resistors measure out at 220k on the nose, PI output coupling caps measure out at .22 uf, grid stop resistors measure out at 999k and the orange and green wires coming off the board are intact and run to the 1.5k’s.
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