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Has anyone experience regarding unplugging the fan for short-term playing? Like, if you play at home for 20-30 mins. Would that be safe?

Is there a more quiet fan nowadays to use instead of the original Howard fan in a Mark IV REV B?

I have never ever seen anyone say go for it regarding changing your angel wing to a batwing. So I just had to try on my Angus Young Sig. I ordered a batwing for a standard. Had to modify it slightly around the neck. I then cut off the screws needed for the upper part. Glued them to the...

I have the Malcolm Young Signature, the latest version. I changed to PT plus to get even more bite and I'm happy with it.

I've done quite a bit of tube rolling in my Rev B. Even the power tubes. JJ's are an improvement imo. Get one of those expensive ones for V1 and V2.

I'm sure he does unfortunately I live in Sweden so the shipping plus the work he'd do ...might as well use those money for a new amp.

Rotary switch 5 way on the back of a Mark IV. Is there a replacement for this or a substitute? https://photos.app.goo.gl/nw1mPHWjfFEMCyrH6 Also wth is going on here? Tubes are fine. https://photos.app.goo.gl/GM5MTFT73C4uwvW98 Please answer if you know.

1: I'm thinking of putting JJ 6L6GC in my MKIV Rev A (aug '91). It arrived used with groove tubes. Can I expect it to be a safe change? 2: The V3 slot (labelled 12ax7 slot) doesn't like anything but a 12at7 it seems. Not that I'm complaining, it sounds good. If I put let's say a Tungsol 12ax7...

Images of which one I mean. I don't know which one to order in their store. https://ibb.co/7yxcdk7 https://ibb.co/23qBQ8p https://ibb.co/hFkLdxs

Thanks. Yeah I've figured out the settings, sort of. Unfortunately I believe there's some sort of JJ's in there. Just curious if someone had found certain tubes that is optimal for tight chugging.

Is what I'm aiming for in my MKIV. Can you give me a few tips on your favorite tubes that is in that direction?

Mark IV. Anyone knows the name or number for the lead drive "lug"(?) The push-pull one. It's the one the qtip is pointing at. I'm assuming it's the D-shaft kind. It's driving me nuts cutting in and out. I'm in Sweden so I'm hesitant calling overseas. Could it be this one? If so is there a...

First time MB owner. Got a '91 IVB the other day. After reading all 700 plus posts here and in other forums I'm almost afraid plugging it in again. I suspect the brown Sprague 10,000 needs to be changed before they make an expensive mess. What can I get instead? Lead drive is a bit scratchy...