[MrFixr55]

I used WD40 (gulp) to clean several toggle power switches for RCA Radiola 16, 17, 18 and 60 sets. However, this is before I bought the DeOxIt D and R5 Fader Lube when I got into restoring Audio mixers and PA systems.

I have an RCA 6BT that use 4 of those Mallory bias cells in the IF (-2V) and Convertor (-4V) AVC circuits (As if the bias developed by the AVC circuit was not enough). My 5BT uses 2 cells (2V on both the IF and Converter grids through the AVC circuit). Seems to work fine with the cells bypassed, but I am in a local area with plenty of stations and I run the radio on a power supply so I am not toasting B Batteries. The Bias for the Audio is an entirely different story. The bias voltage is there from 5 AA alkalines.