![]() ![]() I like Vibrato, so I don't, but the "Vibrato Mod" is not a big non reversible mod. One of the leads on my draining wire resistor recently broke inside the shrink tubing, and when I checked the test points, I still had voltage. ![]() You are right about the fear of getting jolted or killed, never work or poke about inside a tube amp without draining the caps *and* checking for voltage on both sides of the standby, to make sure that the caps have really been emptied - never blindly trust any draining resistors or even your own draining lead. the 125A6A OTs on Bandmasters have often been replaced, probably best to bias the output tubes a bit conservatively).Īgree with Geezer on the trem, the opto isolator has sometimes also simply been replaced with lower spec/slower reacting one, which weakens the trem as well. ![]() BLACKFACE BANDMASTER HEAD CODEYou can have the seller send you the date codes on the transformer, to make sure they are original, it should probably have Schumacher's which should have a 606-6xx or 606-7xx date code (see and the AA763 parts: PT: 125P7D, OT: 125A6A, Choke: 125C1A. which would mean checkup/service costs on top (which should be done anyway, you never know what people have done or not done (power section caps & resistors) to older amps over the years). that seems a bit high to me, if the trem is weak, it may not have been serviced/checked in a while. I don't really have my finger on the pulse of prices Stateside, but do occasionally compare prices as a reference to the ones here. ![]()
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