05-11-2015, 05:02 PM
(05-11-2015, 04:45 PM)pwdrive Wrote: NM here's a classic text on potentiometers:
https://www.bourns.com/pdfs/OnlinePotent...ndbook.pdf
Lawrence.
Thanks. That was something I was struggling with on the GEC at the time. It just took me a while to finally figure out they simply can put bias on the grid. In fact, Chas Miller pointed out he'd often found 5 K potentiometers fitted as opposed to 500 K ones. I just thought it would have been nice in the book to put a few sketches of potentiometer resistance wiring and then I'd not have to have struggled as much at the time. That book was written by someone who'd been doing radio repair for decades but the reader very often has no such hands-on experience or apprenticeship.
Rick Mcwhorter's book is free to download. Despite some bad reviews he's clearly repaired dozens of American tube radios so my best is he's maybe got a few good ideas to share. Don't know if his YouTube channel is still running.
