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Posted

Hi guys,

Wondered if i can get a little bit of advice.

MY orange ad200 keeps blowing both output valve fuses.

When the amp is on it plays fine for about 15 mins then tubes 3 and 4 start to glow really intensely and then 'pop' both fuses go!

Does this just mean that it needs re-valving or is there likely to be another problem that is causing the protection fuses to go?

Im going to take it to a repair dude but thought i would ask before i do!

Posted

Either needs new power tubes or there's a fault with the bias circuit (latter can be related to the former).

Really, you want to get it checked out by a competent tech, as he'll be able to ensure the bias circuit is operating correctly, as if it's not you may just cook any new tubes very quickly and/or cause additional damage.

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