Good to hear, Sandy. My half-dozen or so came in various states. One 3-6 Megger was fresh-looking just like yours, and purred like a kitten with the 125-150-ish B+ from an old ERIC tuner and a 24-Volt filament transformer attached (you'll probably want to rewire your filaments in parallel for 12-Volt operation). Another BCB version had a home-brew supply on the back which produced smoke when I powered it up!
Here's a link to the Everson/Beach manual (it didn't attack my computer):
http://hilltoparmyradios.com/Surplus...anual_vol2.pdf
Take it with a grain of salt, they are hams, not BCB DX'ers like us, but it's at least a primer.
One last thing, the audio output xfmr is not the right impedance for a speaker.