How To Ground You Grids On A Sb-220/3-500Z Amp

How to ground you grids on a Sb-220/3-500z amp

How to Check your Bias on a 3-500 tube amp

How to Build Your own Parasitic Suppressors

Repair And Modifications Of A Heathkit Sb-220

"New" In box Sb 220 kit Build first ever on video Pt.3

The Big Red PIG!! 2 x 3 500z

Maco 75 just received. Why do I keep doing this to myself?

CB Radio History Channel

Penta 3-500zg lets test them 3500Watts???

Heathkit SB-220 unpowered walkthru and thoughts.

CB Radio History Channel

Mr Worthmore's Personal 8 pill