Epic win!

[Jon A.]

Originally Posted by zeno

Back cross it in an ECG catalogue. Look at the list of Zenith
numbers that start with 221-###-# ( IIRC its 221-, maybe 212-) &
find it that way. Sorry for bad memory.......

73 Zeno

I'd like to, but I don't have a ECG catalogue.

[zeno]

And IIRC you cant run a list from the digital version.
An ECG or NTE hard copy is needed. I dont think I
have one but I will scratch around tomorrow........

73 Zeno

Originally Posted by Jon A.

I'd like to, but I don't have a ECG catalogue.

[sampson159]

http://www.ebay.com/itm/ECG-556-Coll...cAAOxyOMdS2ZdC

just came across this on ebay-free shipping

[Jon A.]

Originally Posted by sampson159

http://www.ebay.com/itm/ECG-556-Coll...cAAOxyOMdS2ZdC

just came across this on ebay-free shipping

Not for me. Thanks for the heads-up though, I didn't know I could also search for ECG.

[Jon A.]

Now I need a focus pot. Any idea what to look for in a replacement? Mine says:

37-39627-3
TRW 7919
35MEG 10%

[zeno]

You need to find one with the well insulated mounting.
If you find say a 20K you can mess with resistors to get
it in range. The mounting is the key.

73 Zeno

[Jon A.]

So I don't need one with a plastic shaft? Also, the "35 meg" indicates 350k ohms, correct? I've been looking for a suitable replacement for many hours and it's been very frustrating.

[zeno]

Originally Posted by Jon A.

So I don't need one with a plastic shaft? Also, the "35 meg" indicates 350k ohms, correct? I've been looking for a suitable replacement for many hours and it's been very frustrating.

In the case of focus pots the ones that look like normal pots
are almost all plastic cause there is 6KV on them. There are
also newer styles. A pix of it would help.

When you see "meg" add 6 zeros to it so 35 meg is 35,000,000
ohms or 35 million. 350k add 3 zeros so 350,000 ohms.
35 meg sounds high maybe its 3.5 meg ??

73 Zeno
LFOD !

[Jon A.]

I may need the schematic. I've been googling like mad trying to figure this out.

Unfortunately I tossed the original control *very* recently. However, I took photos of the nearly identical control in my Electrohome console. The biggest difference in its appearance is how it's adjusted. The Sylvania unit had a short shaft.

No value on the Electrohome's control, but the schematic says 17M5. Not sure what that means either.

[Jon A.]

Found two on eBay that are physically identical to the Sylvania unit.

http://www.ebay.com/itm/221372494259

http://www.ebay.com/itm/391167737957

[zeno]

meter the old one. if its 5 meg you can measure it.
If 35 meg probably not. The 35 meg would have a printed
resistor on it as part of a divider. Of course thats if its not
wide opened. You can also measure with a HV probe.
One end will have apx 7KV DC center 6KV other end
probably much less than 5KV.

73 Zeno
LFOD