That's what I thought too, but when I opened my amp up there they were, two brown caps exactly as described, so IDK... My Mark IV is one of those transitional amps too, as in it has some cosmetic qualities of the A revision (attached power cord) and is sometimes called the IVa/b.I believe only the early "A" amps have those caps. I seem to Recall Mike telling me that when I spoke to him before getting my amp overhauled.
I would wait till you have the cash to get the caps changed. I mean they are well over 20 years old, but it’s not like it’s an urgent thing. Worse case they explode and you have to pay more.That's what I thought too, but when I opened my amp up there they were, two brown caps exactly as described, so IDK... My Mark IV is one of those transitional amps too, as in it has some cosmetic qualities of the A revision (attached power cord) and is sometimes called the IVa/b.
Spring is always a flood of amp repairs and this year is not different.
That's what I thought too, but when I opened my amp up there they were, two brown caps exactly as described, so IDK... My Mark IV is one of those transitional amps too, as in it has some cosmetic qualities of the A revision (attached power cord) and is sometimes called the IVa/b.
So is that a photo of the bad caps or not ?For reference, I contacted Mike B about my IV B, serial 12xxx and he said: "Those are not the nasty SPRAGUE timer bomb caps, they are the early version Illinois caps we used. I have seen no disasters but I do pull them to replace and usually find a touch of leakage on about 20 % (?) of them."
Hopefully this photo can help.
Other than the color how can you tell if they are the caps that need to be replaced ?