[codefox1]

I remember the old HF 20's and HF 22's, built a couple of 'em when I was 12. Yes, power transformers ran a bit warm, but so did most of 'em way back when. If you stuff 'em into a cabinet, scrounge a little "whisper" fan from an abandoned PC power supply; they'll run OK on the 6.3 v. winding with a 2 cent diode. Plenty of room underneath to put modern caps ,in series if need be to get voltage, but stuff the old ones you can. I remember the purple harmless gassy 6L6's "dancing" whilst the music played.