Vibrator hums okay on a little 6 volt battery, either way I'm going to be retrofitting one of these
https://www.pekorf.com/RadioHomePage.html and saving the mechanical one for an EMP
Thanks for the tip on the bias cells
first time I've encountered one of those before. I guess that's the only way the could get negative grid bias on a setup like this.......
I also have a synchronous Mallory Vibrapack and a dual power Navy Morale radio (async. vibrator w/ gas rectifier) around here that I've been playing with, so I'm no stranger to vibrating power supplies.
I just got done identifying all the capacitors and gouging out the bakelite blocks (3 total) so I can put together a BOM for the recap.