Predicta Debutante Restoration

[Crist Rigott]

Originally Posted by dcl0

Crist, It looks like you are using metal film resistors. What voltage rating did you use for your 1W and 2W resisistors? I'm especially interested in the ones under the HV rectifier tube socket? Thanks, in advance.

For the 1W I try to use carbon film, but will use metal film too. For the 2W they are usually metal film. The carbon film are 500V, the 2W are 350V.

[Crist Rigott]

Today I added the new "Fusistor" and a 2A fast blow fuse. I had a 10 ohm 50W chassis mount resistor so I mounted it on the back of the HV cage. I then wired it to the original Fusistor connector. The 10 ohm value will give me a B+ voltage of 280V using my wall outlet which gives 123VAC. The normal B+ voltage is listed as 275V. This way when the HV cage needs to be removed they can be unplugged without any fuss.

I also installed the IF board cover.

[Crist Rigott]

I then turned my attention to the CRT/Yoke. I removed the CRT from the shell and gave the CRT a quick wipe down.
I replaced the 2 680 ohm resistors (both were within tolerance) and the 120pf 5KV capacitor. I used a 120pf 6KV cap for that.











I then cleaned up all the wiring and cleaned the connectors too. I then used my lacing cord to tie up each bundle neatly instead of the tape Philco used.



I then cleaned up the inside of the shell. It had a lot of "soot" in there. Now nice and clean.

[Crist Rigott]

I noticed that the wire going to the Plate Cap from the 6DQ6 Horizontal Output tube was missing some insulation where it enters the cap. I looked closer and noticed that the inside was was corroded green and needed attention.

I replaced the wire with some 20KV wire that I have.

I also used a silicone grommet where the wire exits the HV cage. Dan Jones gave me this tip at his presentation at this years ETF Convention.

All better now.

[Electronic M]

Originally Posted by Crist Rigott

I noticed that the wire going to the Plate Cap from the 6DQ6 Damper tube was missing some insulation where it enters the cap. I looked closer and noticed that the inside was was corroded green and needed attention.

I replaced the wire with some 20KV wire that I have.

I also used a silicone grommet where the wire exits the HV cage. Dan Jones gave me this tip at his presentation at this years ETF Convention.

All better now.

I believe you mean Horizontal Output.

[Crist Rigott]

Right! I'll make the correction. Thanks.