1960s Sylvania Color TV Console Issues

[vortalexfan]

I checked all of the Orange and Brown drop capacitors on the deflection circuitboard and out of the nearly 2 dozen orange and brown drop capacitors there were 6 capacitors that were leaky and or shorted 4 orange drops and 2 brown drops, the rest were still good yet.

So I just need to order the capacitors and replace the bad ones and I think it should be good to go.

I have a question one of the capacitors in the deflection circuitboard that is bad is a .56 µF 100VDC capacitor and I wonder if I could use either a .47 µF or a .68 µF Capacitor in its place since .56 µF is such an oddball value that doesn't exist anymore more than likely?

[damen]

Since that .56 is a bypass cap, its value may not be that critical. Either the .47 or .68 should be fine. Or you could put a .22 and a .33 in parallel and end up with a .55.

[vortalexfan]

Originally Posted by damen

Since that .56 is a bypass cap, its value may not be that critical. Either the .47 or .68 should be fine. Or you could put a .22 and a .33 in parallel and end up with a .55.

OK, thanks for the info. I was kind of surprised at how many of those Orange Drops were actually bad on this TVs Deflection Board, and they weren't your cheap run of the mill orange drops either they were Spragues, which are normally pretty high quality capacitors. and then there were some General Industries Brown Drops in there (there were about 4 of them in total) and two of them were bad, so I'm not sure what kind of failure rate we're talking here but it seems that out of about 30+ mylar caps on the deflection board and the majority of them being Sprague 716P Series Orange Drops and only 4 or so General Industries Brown Drops to have only 4 Orange drops fail and two Brown Drops fail over the course of about 57 years I think that seems like a pretty decent track record. What's interesting is that it was only the vertical section caps that failed and the horizontal section caps were still good (this TV's Horizontal is rock solid yet, it was the Vertial section that failed, and I find that seems to be the case with the majority of the TVs I've worked on so far is that the Horizontal section is fine but the vertical section is what fails.)

[zeno]

Dittos on damens advice.

Just one thing, are you lifting one end of the caps you test ?
I wouldnt think so many were leaking, especially Sprague OD's.
Same with resistors, especially high ohm ones.

Zeno
LFOD !

[vortalexfan]

Originally Posted by zeno

Dittos on damens advice.

Just one thing, are you lifting one end of the caps you test ?
I wouldnt think so many were leaking, especially Sprague OD's.
Same with resistors, especially high ohm ones.

Zeno
LFOD !

No, I checked all of those Capacitors in Circuit, because I figured that with my capacitor checker being of the old style tuning eye tube variety it would be able to test the capacitors in circuit as far as leakage and shorts go, also the instructions that came with my tube checker which is from 1938 doesn't say anything about needing to lift one leg of the capacitor to get a reading from it when it comes to leakage and or shorts.