In Reply to: RE: Input tube suggestions? posted by Genp on July 12, 2016 at 19:29:32:
On a side note, based on your desired operating point for the 300B while taking into account that the tube is cathode biased, the plate voltage will need to be at 422V if you want 350V through the tube (422V-72V = 350V). The 72 Volts are dropped at the cathode resistor (1.2k x .06A = 72V). Since you'll probably be dropping another 20 or so volts at the transformer primary, you should be designing the power supply for a B+ of around 445V
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Input tube suggestions? - sideliner 08:48:48 07/13/16 (0)