[mwiedmer]

Thank you, Chas. Rapping the vibrator did not yield success, so I opened the can and cleaned the contacts. I reassembled the radio components on the floor of the car and used the car battery and wiring along with a ground wire. Now the vibrator hums (quite loudly). I must replace at least one burned-out tube, but at least I now have noise, where I had none before.

As I am all new to this, where should I search for condensers? Are there ways of testing condensers?

Thanks.