Predicta: My first official Restore

[Phil Nelson]

For what it's worth, both the Sams schematic and the Philco factory schematic give 22K for that resistor. One says 80V for that pin, the other says 50V.

Phil Nelson

[6GH8cowboy]

I went ahead and changed the bobo 10k resistor with a 22k and it helped a little. I then added the "buzz pot ( a 500 ohm trimmer) to the detector cathode and lifted one end of the existing resistor, that helped a little also. Between both, the sound is usable and fairly forgiving with strong video content. My gut feeling is the converter box is providing a very strong video signal and slightly low audio. I have noticed the low audio on the last two roundies I restored but they tuned up better than this predicta for the sound.
I'm going to let it cook for a couple of days.

I'm going to take a screen shot of the closing credits of Rock Center with their operating predicta on the shelf on this predicta.