[MrFixr55]

Hi Peter,

Wishing and praying for peace throughout the world and in your region. Passover and Easter Blessings to you and yours!

Regarding RCA's use of Class B Amps, apparently, RCA discovered (or someone else discovered and RCA took credit for it like they usually do) tubes that could put out a motherload of power in "Class B". RCA used to claim that any output stage with a total harmonic distortion of less than 5% was "undistorted", so Class B was somewhat popular with them. For example , the "53" and 6N7 could put out 10 watts. The 49 and 19 tubes with 2V filaments, used in "farm" sets could put out 2W. 2 46s could put out a whopping 20W as opposed to 2 47 pentodes in class A push pull which could put out only 3-5W. And yes, they do NOT sound as nice as a Class A or Class AB1 Push Pull amp. RCA won't admit it but the 42 (and I think the 41) were Sylvania inventions, and Philco, a major car radio manufacturer, jumped on that bandwagon quickly. RCA was still into 2.5V tubes, and their version of the 42 was the 2A5.