Predicta Princess - a few questions.

[maxhifi]

Hi Greg,

Thanks for the advice! I will order a full set of resistors, 60% is pretty bad! I took Apart the TV today. The CRT tested bad at first but became good after giving it 3 minutes at 3.7V, and then turning back down to 2.68. The chassis is really dirty, the circuit board is covered in a greasy film, and there are many brands of tubes, only a few are philco.

[Jon F]

On mine, I replaced the Vertical Feedback and Horizontal Multi networks in addition to all paper/electro caps. Also, almost half of the tubes tested weak/bad.

I didn't replace any resistors on mine, except for the fusible resistor. I tested some and they were OK, and the set plays well with good geometry and stability so I figured I'd leave it.

I sprayed down my chassis with water to clean all the crud off it, and let it dry overnight over a heat vent. Not really sure if it is good practice though so tread at your own risk.

[Gregb]

My Princess was really dirty as well, I used Spray Nine and q-tips as I was changing components, I have attached an after picture. Make sure you draw yourself a real good diagram before disconnecting all the wires to the board.

Gregb

[kvflyer]

Originally Posted by Gregb

My Princess was really dirty as well, I used Spray Nine and q-tips as I was changing components, I have attached an after picture. Make sure you draw yourself a real good diagram before disconnecting all the wires to the board.

Gregb

Nice job on that PCB! On a side note, the series string sets have tubes that are extremely inexpensive. I bought several for my set even though I have not had time to work on it. There is a tube vendor in Orlando, FL who often has many of the tubes on sale for $1.00 each. The other ones for the most part are only $3.00 each and all are NOS, various brands. Tubes in my Predicta also tested very weak for the most part.