Resistors for Predicta

[mrjukebox160]

Oddly, on the Sams that network is shown as K5. I don't know how much A/C is getting through C14. The spikes might be too high for a 630 volt cap.

[bandersen]

Originally Posted by mrjukebox160

Oddly, on the Sams that network is shown as K5. I don't know how much A/C is getting through C14. The spikes might be too high for a 630 volt cap.

Some confusion between the Philco service info and Sams.

The networks are labeled N1-N7 by Philco and K1-K7 by Sams and the numbers do not refer to the same parts.

N2 is the same as K5 and is the vertical feedback. Yes, it is the only network that sees a voltage spike needing a higher voltage cap. 630 is more than enough for all the others.

[Tony F]

Hello Bob, Thank-you for clearing that up ! I have a .0015 @ 1600 for that network. What about the 2200mfd that is used in the same network ? I have a 630 volt, but don't have anything at 1000V ? I will have to special order one if it is required. Also, I have replaced all resistors 1/2 watt with 1 watt, 1 watt with 2 watt. The only ones I'm questioning are the 3, 2 watt resistors R19, R40 and R45. These , I replaced with 2 watt ECG metal film, even though they are half the size of the original carbon comp ones. Nobody has any 3 watt metal film resistors in this area. I have left the WR4 (4100 ohm) and the R15A (5.6k 3 watt) one alone. I've pulled all 3 of the Can electrolyics and they all test good. Most are 20 to 30 mfd higher than the rating on the cans. I've pulled the solder from the traces on the board that cover up the holes where you added the 3 radial electrolyics to the board. Looks like I have to drill 1 or 2 holes (and run a small wire, like you did) to mount them. Also, did you mention that you used 1N5408 diodes to replace the original (34-8048-2) diodes ? It seems to be slowly coming together. I just wish the last person in this set didn't hack it up so much.
Thanks again for your valuable input.
Tony