Vox Buckingham Reverb Tank

[Haldy]

First time poster here!! I'm slowly bringing this amp back to life. It's been dead for decades. I need some direction on this reverb tank. One spring is gone. It has a transformer to drive this circuit. Both input and output connectors are grounded to the tank housing. Measurements are similiar to what Accutronics calls a Series 4, long, 2 spring. Anyone have a recommendation with a specific part number?

[52 Bill]

Welcome to the place.

If you're sure it is transformer driven, a standard Fender style tank will work with the exception of the ungrounded input jack.

So I guess 4AB3A1B would be the one.

[Haldy]

Thanks for the quick response! I'll order the tank today. By the time the reverb section is done, I'm sure there will be other issues. To me, it looks like a lot of different hands were poking around in the preamp section. Still working on the smaller electrolytics.

[52 Bill]

Yes, the electrolytic caps in that amp are always the first thing to replace. I probably wouldn't even bother to test them, just shotgun the entire amp.

[Haldy]

Just checked what's in the amp versus what SHOULD be in the amp. Transformer driven, insulated input(?) 8 ohm, output grounded 2250 ohm. Does that seem right? 4AB3C1B then? Not sure if tank in the amp is original. It was missing feet and two screws!

[52 Bill]

Does the amp have a grounded shielded cable going to the tank? If it does then the input jack needs to be insulated, if not then the input jack needs to be grounded.

[Haldy]

Yes, the cable from the transformer to the tank is a shielded cable. The cable out of the tank is also shielded. So the tank in the case is the wrong one! Ta-da! Well, that should take care that problem. Thanks again! I'll finish what I've got half completed, retest and repost.