Another RCA CT-100 discovery B8001599

[Penthode]

Getting the subchassis's prepared for putting them back together. And scrupulously going over connections and components.

I make ote of the Peter Deksnis alert for the 6BK4 HV Regulator replacement for the 6BD4. As he discovered, pin 8 on the tube socket is used as a tie point for the original 6BD4 circuit. Substituting the later 6BK4, it has a pin 8 interconnection to the cathode.

https://www.earlytelevision.org/Deks..._6bd4-6bk4.htm

I added a tag strip wiring point to carry the connection away from pin 8 of the tube socket as,depicted below. After this last item, I recounted the HV cage back to the main chassis.

The CRT socket HV leads for the electrostatic focus and convergence electrodes had deteriorated and,were,about to fall off. I missed out on the one recently for sale on eBay. Taking the socket apart, revealed the HV electrodes encapsulated in a molded plastic piece. I had to break the plastic surround to remake the connection and in the process of making a small plastic surround replacement.

The vertical integrator leads were corroded from my mouse friends to the point one lead easily disintegrate and dropped off. For those familiar with these things, it is a Central "Couplate" number PC-101. I decided to remanufactured one as it has only a few passive components: a 002uF, two .005uF and 22k and 8.2k resistors. I ordered from Digikey some surface mount chip components I will put on a little board less than the size of the original couplate.