Rickresource Rickenbacker Forum

OK! After many months, I finally got a chance to get the B410 back on the bench and experiment with reverb. Based on Soundmasterg's info, and my own impedance calculations, I ordered a MOD tank, plugged it in, and gave it a shot. As you might expect, it didn't /quite/ work the first time... Fortunat...

Greg - If you have any way to directly measure the input and output impedance of the original reverb tank, that would be great. If not, then can you read the model number stamped on the side of the tank? If I knew that, then maybe I could find a data sheet for the tank with the original specs... JPS...

OK, not much response, I see...I will continue to post updates anyway, in an effort to help out the next person that tries this. I bought a Mojotone 775 output transformer, which was apparently designed for the blackface Twin Reverb. The mounting flanges are the wrong dimensions entirely for the B41...

Update: definitely a bad output transformer - I pulled it from the circuit / chassis and verified both an open circuit on the input side and a short between input and output side. Mojotone makes a twin reverb OT that's the right physical dimensions, so I'm going to give that a try. I'd still like to...

Hi Greg, thanks for the response! For the output transformer, my ohmmeter reads infinite resistance between one of the two input side leads and the input side center tap. It also reads a very low resistance between the input side center tap and the output side leads, which probably accounts for the ...

Greetings, all! I recently became the proud new owner of a 1974 (I think) B410. It's definitely a good news / bad news situation. The good news is, I got it cheap! The bad news is, it's missing a few things...like output tubes. And the reverb tank. And the cabinet. And I'm pretty sure the output tra...