Tremoverb problem; no more reverb?

[Lurch]

I just lost the reverb on my Tremoverb head.

I replaced the preamp tubes and checked the connections to the tank.

I also opened it up to look for any burns or anything obvious, but found nothing.

Any ideas that I can try myself? (I'm familiar with BASIC electronics, and have a multimeter, so I won't electrocute myself :lol: )

Thanks for any help! 8)