Philco 48-2500 Restoration Blog

[Findm-Keepm]

Originally Posted by Tom Albrecht

Ok, so my solid state voltage tripler has arrived. It has a few more terminals than I anticipated, so if anyone is familiar with this unit (TCG523 or NTE523), how is it connected?

Terminals are:

IN - HV AC in?
G - ground?
F - what's this?
CTL - what's this?

One lead is fairly straightforward to identify -- the big red wire with a CRT anode connector on it. Think I know what to do with that one.

Tom

IN - HV AC in? Yes, from the flyback
G - ground? Yes
F - what's this? Focus Tap from the internal voltage divider.
CTL - what's this? Focus or Screen Control Tap from the internal Voltage Divider.

Datasheet archive has the datasheet fro the ECG triplers, IIRC - so you can see the divider network resistance values.

Cheers,

[Eric H]

I'm waiting on parts for the Westinghouse so I decided to play with this set again.

I put the CRT in the barrel and projected it against the Vertical Blinds behind my workbench. (got to get that second anode lead replaced, it leaks the 20kv like a 60 year old garden hose!)

Not too bad considering the geometry is all wrong, the brightness is really good using one of the old CRT's. (the picture is also upside down and backwards because it's being projected directly, I flipped it in Photoshop)

I can't wait until I can get it back in the cabinet and see what it looks like when it's set up correctly.