Talk:List of valve amplifier designs

Brook Electronics
Any one object to the addition of Brook's 2A3 PP designs?

The sliding bias 10C is still well regarded (along with the 12A fixed bias unit). See EDINGER, J.R. "High-Quality Audio Amplifier With Automatic Bias Control" AUDIO ENGINEERING, JUNE, 1947 p7-p10  — Preceding unsigned comment added by Thoglette (talk • contribs) 05:39, 17 May 2013 (UTC)