Here is another Popular Electronics article from April of 1958. I really like these articles because I learn some basic along the way. The information may be a little outdated but the basic principles are the same.
This post originated at retro vintage modern hi-fi http://itishifi.blogspot.com
Tube of the Month: The 211 (revisited) - Hi! The 211 / VT4C was already covered extensively in the Tube of the Month of July last year. Judging by the clicks that post received and still receives...
7 hours ago