Horizontal efficiency coil concerns

[Tubejunke]

Originally Posted by wkand

Here's what a search for a wc39 yielded. Cut and paste into your browser, good luck [url]http://www.remelectronics.com/SearchResults.asp?]

Hey thanks, they do indeed have it listed, but listed as "contact REM" so I will have to give that a try. Probably with "roundie" color sets being the current rage and this being a common problem the supply chain is dwindling.

[MOSFET]

Slim chance you will ever find a good or NOS efficiency coil for this set. The plastic spool assembly for the efficiency coil is the exact same as any of the right side convergence coil assemblies. Your best bet would be to get a much more easily obtained convergence coil, unwind the wire off of it, and re-wind the spool with the wire from your existing efficiency coil. Its not that hard becaus the wire gauge is much thicker for the efficiency coil, so there is no worry of making a mess of the wires, plus there is no special winding pattern, just CAREFULLY follow the winding direction as you unwind the old coil so you can "recreate" the new one. I've done it before. Works perfect. Just be sure to use the original iron slug from the old coil.

[old_coot88]

Originally Posted by MOSFET

Slim chance you will ever find a good or NOS efficiency coil for this set. The plastic spool assembly for the efficiency coil is the exact same as any of the right side convergence coil assemblies. Your best bet would be to get a much more easily obtained convergence coil, unwind the wire off of it, and re-wind the spool with the wire from your existing efficiency coil. Its not that hard becaus the wire gauge is much thicker for the efficiency coil, so there is no worry of making a mess of the wires, plus there is no special winding pattern, just CAREFULLY follow the winding direction as you unwind the old coil so you can "recreate" the new one. I've done it before. Works perfect. Just be sure to use the original iron slug from the old coil.

Wow that's cool. I never rewound one. Was the current-dip point somewhere near midrange after the rewind?

[Electronic M]

I was at the ETF and got a 25MC33 chassis(I always liked the chassis # better from an electronics ID stand point) roundy, and there was another Zenith roundy chassis there that I was tempted to buy in the silent auction if only I was able to stay till the end. Seeing this post again I'm regretting not convincing someone I knew there to collect it for me, and I may regret it more if the HV issue in mine is bad unobtainium.

[Tubejunke]

Originally Posted by MOSFET

Slim chance you will ever find a good or NOS efficiency coil for this set.

Thanks for the ray of hope MOSFET. That idea will probably help a lot of people if this is as common a problem as some say it is. However, I have often been surprised at exactly what is still laying around for sale in the N.O.S. realm. A few years ago I restored my 1950 RCA TC-127 and the power transformer was toast. I was able to find an exact replacement for that dinosaur for a reasonable price. Then I keep dreaming that as popular as early 60s color sets have become that I should be able to find someone with a spare chassis or three that would come off of one for a little cash.

My set being a model 5111 may throw some people off, but the chassis should be about as common as the come for that era. The 5111 is the metal cabinet model which are few and far between as people tossed them when they quit or when the upgraded to a nicer looking wood cabinet with a larger rectangular screen just a few years up the road. Anyway, mine is exactly the same as other 1964 (ish) Zenith color models which should be still pretty plentiful. I can't see hobbyists tossing otherwise good working sets to the side, or to scrap over an inductor. I feel like over some time something will come through here.

I just have the itch to see that thing working properly, AND with a new woman wanting to replace my junk with her junk it is easier to justify keeping when it actually works! I'm sure many of us have been down that road! SHE, not me, is the reason that the Space Command got scrapped! LOL

[MOSFET]

Originally Posted by Tubejunke

Thanks for the ray of hope MOSFET...

Yes, you are welcome for the ray of hope. Your ray of hope is to rebuild the coil as I suggested which would be just as good as installing an NOS coil. That being said, I really don't think I was blasting you with negativity to justify the sarcastic comment...

[Tubejunke]

Originally Posted by MOSFET

Yes, you are welcome for the ray of hope. Your ray of hope is to rebuild the coil as I suggested which would be just as good as installing an NOS coil. That being said, I really don't think I was blasting you with negativity to justify the sarcastic comment...

Ummm, I meant absolutely no sarcasm in your giving me a good second way of doing this in the case that an NOS or used part is unobtanium. Should have used emoticons I guess. Sorry man, but thanks the same.

Best regards,

Tube