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I'm located in London. I'll measure mine today.I can't make out the model number from the photos maybe that will help determine whether it's a good candidate for a princeton reverb.
I've got an Accutronics tank marked 4FB2A1C if that's any use and the other one falls through. Came from an old PA head as far as I remember. Not sure what the differences are between those models.
RiftAmps said:It has a higher input impedance (1475ohm) compared to the 8ohm of the classic Fender one. The decay time is shorter (1.75-3 seconds) over the Fender's longer 2.75-4, and the mounting positions are different. the Fender one sits on the floor whilst the Marshall mounts vertically with the connectors facing up.Both are 16.75" tanks with 4 counter-wound and coupled springs. They are not interchangeable.
I picked up an unmarked Accutronics tank a few years ago that, on checking the DC resistance appears to be a 4FB type. I did try it in a Fender type circuit, and it "worked", but just barely so - there was reverb but very little depth. I eventually found a home for it in my last DIY amp, which used a capacitor coupled driver rather than the Fender type transformer coupled driver.