How to read Schematic (1939 ZENITH Console Radio) Part 4 

JZ, I have learned so much form you. You explain things so clear and effective that the new person without electronic background can understand and not get overwhelmed. I watched other RU-vid channels and was so confused since their presentation is focused on individual with electronic background. Thank you so much for taking your valuable time making these videos.

Ideal informative video. Thank you, Jay, for sharing your knowledge.

I am happy to support your excellent channel. Thanks.

With this design of radio a power transformer with a center tap line it is the common return or negative side called B- . You were supposed to know that if you ever learn about radios back then. Yes it helps to read up on radio design which is VERY important by the way and how to read schematic diagrams which sometimes have errors in them like missing values or with diodes in a circuit they might be labeled in reverse. Caught a few schematics in my time with a reversed symbol for a rectifier diode! Some radios have the chassis as ground (as this radio) but is totally separate from the B-. When mounting the new electrolytic capacitor it is a good idea to mount the values facing towards the opening of the bottom so you see the values plainly as you did Jay. Thanks for sharing this with those who may be new to this kind of repair work.

Very excited to see the finished work coming up 🤗

I have had my channel since 2009 and just now getting close to 1000 subscribers so you have done a lot better than me Jay. Yes indeed always want to check that polarity on that electrolytic or I did reverse one time and Kapow! So polarity is very important. Restuffing the cap is dome by most radio restorers to keep it looking original. All really great work Jay. You are doing great. I would like to see what vehicle you are going to restore sometime.

Luv yur patience grasshopper 😊. Keep up the good work 👍

I could not see clearly in past videos what was the glue you were using! I just purchased some Aleene"s Tacky Glue, 16oz bottle at Walmart, very inexpensive, I like that it will dry clear.. I have collected a lot of products that you and others have used over the years.. Normally I have used WD40 or 3 in 1 machine oil, but recently got hold of some Zoom Sewing Machine Oil, and that does a great job with its unique spout to get into very tight spaces.. It pernitrate's far better then the other 2... Great explanation on capacitors, things beginners to your videos should learn and understand.. Good Job Robert

Good suggestions Jay. Believe it or not I cannot recall a schematic which does not identify E cap polarities. Not saying it does not happen, and you obviously found one, but I'm thinking it's pretty rare when it does happen. One thing I always do when I buy a new radio to work on I gather all the service documentation I can find while waiting for the radio to arrive. Many times I find that not all the various schematic producers make mistakes. Use all the clues you have for determining which one is correct. Original wiring is usually a pretty good clue unless it has obviously been altered. :)