Zenith 6S229 - Tuning Condenser/Power Transformer Wrap Up, Dial Scale Cleaning & Citric Acid pH Q&A

Wrapping up on the old Tuning (Variable) Condenser (Capacitor) by validating capacitance, DC resistance between the stator/rotor, getting the power transformer back together after painting the housing/validating DC resistance between windings/housing and correcting lead dress issues, polishing the dial scale using Renaissance Wax Polish before reviewing the pH level of the citric acid/water mixture I used to de-rust and clean the Tuning Condenser.
The citric acid/water ratio I used was: ~1 teaspoon of citric acid for 2 cups of warm water.
You'll find the scanned copy of the dial scale for the Zenith 6S229 at:
drive.google.com/drive/folder...
The playlist for the series:
• Zenith 6S229 - 1937 To...
Thanks for watching and subscribing to my channel on vintage radio repair and other related circuits.
#restoreoldradios
#6S229

[@tectalabyss]

Hi Don. Interesting on the citric acid. Glad the transformer turned out good, it also looks great. Has always L and S . All my very best.

[@RestoreOldRadios]

Glad the info was helpful Bobby. Take care and all the best. Don

[@johnblystone8781]

Thanks for all the details Don!

[@RestoreOldRadios]

You are welcome John. Best, Don

[@oldavguywholovesRCA]

Thank you for that information Don. You are an inspiration to us all.

[@RestoreOldRadios]

Thank you for the kind words. Best, Don

[@PracticallyFixed]

Thanks for the info on the citric acid; will need to give that try. That must have been tense back when you first tried the wax on a perfect dial. I would be a nervous wreck. Looks great.

[@RestoreOldRadios]

You’re welcome. Applying wax or other to the old dial scales creates anxiety for me. LOL Thanks for reaching out and watching. Best, Don

[@rciancia]

Very helpful Don, excellent !!! Thank you

[@RestoreOldRadios]

Ron, much appreciated. Best, Don

[@dynotec1]

I’ve really been enjoying watching all of your videos. Thank you for your attention to detail and the explanations of how you do things. I will be incorporating some of your techniques into my radio restorations. Are the grabber style test leads that you use available on the market, they look really handy. Thanks again.

[@RestoreOldRadios]

Much appreciated Bart. The test leads are Parrot 3mm PCX 1m Test Leads, 600V Cat III with Banana Plugs. An eBay seller if needed: www.ebay.com/itm/183841971405
Best,
Don

[@johnsenchak1428]

Why not just use Coca cola ?

[@hestheMaster]

First it is sticky so you must use diet cola. Doesn't have to be a name brand but it has an overall pH of 2.3 for
sugary cola and 3.0 for diet. Ironically car battery acid is at the same pH as Don's citric acid solution.

[@RestoreOldRadios]

John, check out Steve’s reply as well. Knowing my ratio of citric acid to water is more acidic than Coco Cola and less expensive is the main drivers, but it’s really more of a personal preference. Thanks for reaching out. Best, Don