Yeah I've wondered this too, and I will probably put all those weak 6SA7's back in after its all fixed and see what happens. I checked all the tubes before fault finding so wanted to rule them out first and finding all those weaks ones I just had to change them
Quote:
Originally Posted by VintagePC
If they're all bad in the same way, I'd be tempted to wonder if the original builder got a hold of some factory rejects for cheap - tubes that still perform but don't meet the full specs. Since this is a custom built set (and knowing a few people that like to hack together their own stuff), it might well be that the set will operate properly with those "bad" tubes that are out of official spec... but still in-spec enough for that design. I wouldn't bin them just yet  |