Zenith 707 - Winding a New I.F. Transformer Coil
HTML-код
- Опубликовано: 11 сен 2024
- As you guys saw, mice made quick work of the old Secondary I.F. Transformer Coil and a repair attempt was unsuccessful. I'm winding a new Honeycomb Coil using 10/44 Litz Wire to mirror the electrical and physical properties of the damaged Coil.
CORRECTION: 10 feet, not 100 feet of the original Litz Wire was used to determine the DC resistance and back into the AWG.
The Playlist for this series:
• Zenith 707 Restoration...
Thanks for watching and subscribing to my channel on vintage radio repair.
Excellent job as usual! Anxious to see the following installments.....Thanks for sharing....BTW....you know everyone is interested in that coil winding machine! Take Care-Larry
Thanks Larry. I’m hoping our friend Josh will refine it using his lathe and skills. Look for a publish on the winder soon. Take care and thanks again. Best, Don
Absolutely fantastic work! Thank you so much for sharing!
Tony, much appreciated. It was a fun and a learning exercise. All the best. Don
I am so amazed at your coil design and creation Don, man that's cool!
Thank you Tony, I appreciate it. Best, Don
You are definitely a world class restorer!
Bob, thanks for your kind words. It was fun winding the coil and getting it in place. Hopefully it will work, time will tell. Best, Don
Don, you never cease to amaze us with your skills! Love the winding rig! Great job!
Tim, I really appreciate that. I learned a lot myself and this definitely tested my patience. Best, Don
Great .
Just great
The machine, the winding process and the results...
Valdir, I appreciate it. Still some work left, but most of the details are behind me. Thanks again. Best, Don
Man Don, that winding machine you put together doing the cross hatch wind is crazy cool bro. Really on the mark my friend.
Thanks Carl. It needs a little tweaking, but performs well for a “non precision” handmade... Thanks again Carl. Best, Don
Don,
Your encyclopedic knowledge of radios and how to service them is amazing! I wish I could clone you and make you my next door neighbor.
Regards, Tom
Tom - your kind words are motivating. I’ve learned so much from others, so it’s great to give back what little knowledge I do have by sharing my experiences. I think you’re in the NE, so this Carolina guy wouldn’t do well in that neck of the woods, but it would be fun to be neighbors. Thanks again and take care. Best, Don
@@RestoreOldRadios Nope, not even close! LOL. I'm currently living in Southern California, but have tentative plans to move to Tennessee in another year or so.
Impressed! I can't wait to see it working.
Thanks Josh. I’m eager to see if it works as well. Best, Don
The coil winding machine is awesome Don, great job of winding that coil.
Jim, I appreciate it. I will publish a video on the winder soon. It’s a simple build that provides good results for a non precision device. Best, Don
Great job on the coil Don!
Buddy, I appreciate it. That was my first attempt at rebuilding an I.F. Transformer, so we’ll see if it actually works down the road. Lots of rust, etc., before I can get this oldie powered up. Best, Don
Thank you for sharing your time. I always learn a lot.
Joe, I appreciate you watching and your feedback is motivating. All the best. Don
Yeah. You give me the courage to take on a Philco Model 84, picked up on an auction site, sold as needs work, but should have been sold as a kit that needs work.
@@joecarson8281 Joe - that will make for a great project; have fun. You gotta love that old “rubber” wire in those old... Best, Don
@@RestoreOldRadios Ha! That would make a great magic trick. Now you see it, I touch it, and it's gone...
The crazy thing is, all the veneer came of, and the underside shows its all birdseye maple. The conundrum is - do I flip the veneer and make it pop, or go back to a boring brown.
@@joecarson8281 Your call, making it pop would look cool.
That was excellent. It would be interesting to learn more about the machine you made to wind the coil.
Phillip - thank you. I’ll publish a video soon on the winder. All the best. Don
Awesome job on that coil rewind Don!
Much appreciated Gregg. Your 3D printer and mechanical knowledge/skills could take the coil winder to the next level. I’ll be sharing the details soon and would love to see your refinements. Best, Don
Absolutely!
Don, I love watching you do that stuff... its so cool... well done !!!
Thanks Ron. It's been fun and challenging to this point. Thanks again. Best, Don
Well........I'm impressed!
Thank you. Hopefully it will work when I get it back in the receiver. Thanks again. Best, Don
Darn nice work on that component.
Thanks John. Still some lead dressing to do, but hopefully it work out in the end. Best, Don
That was awesome!
I appreciate it Bob. All the best. Don
Wow nice job Don!
Thank you James. It actually turned better than I expected. Again, thanks for viewing and reaching out. Best, Don
That looks like it turned out perfect! Nice job!
Thank you Bob. I was telling James I was thrilled with the Coil. Still some housekeeping left, but at least the Coil itself should be behind me. Best, Don
Light at the end of the tunnel. Seems like the search is over. Precisely for what many were waiting. The resurrection of that bygone art. Like the discovery of TUTANKHAMUNS ....
I was searching this for a few days. There were many but not to this level. It is said. Seek and you shall find. I found it. Thanks
Glad you enjoyed it. Thanks again. Best, Don
Don,
You are worried getting caught with beeswax? That is nothing. I used the oven to cure the spray paint on a lantern once assuming the smell would be gone by 5pm when she got home. It was not gone. I heard about it for 3 days. I was blamed for headaches, nausea, ill-temper, etc..
I have heard of lutz wire, but I don't know anything about it. I will have to do some reading.
Thanks,
Ian
Ian, I’ve already been caught. I didn’t get my mess cleaned up before she walked in on me. I’m sure that smell of paint had you in the doghouse for 3+ days. LOL The Litz wire was used for many of the coils, especially for frequencies 1 MHz or lower. It has many advantages over solid copper. Thanks again for watching and keep those lanterns out of the oven. Best, Don
@@RestoreOldRadios Don was BUSTED!!
Doesn't everyone love how much litz wire cost and how hard it is to find.
Carl - an eBay seller at: www.ebay.com/itm/163056381996?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=n5wzLzgwTEC&sssrc=2349624&ssuid=&var=&widget_ver=artemis&media=COPY
The supplier I used: www.mikeselectronicparts.com/product-category/wire/litz-wire/
1:53...have you heard using an aspirin tablet to solder enameled wire?
Dale - yes. Bob A. shared that technique a few years ago in one of his interesting restorations. Thanks for reaching out. Best, Don
What a beautiful job! Will you show us how you made the machine? Thanks.... Dean
Dean, much appreciated. The plans for the winder; a fee LOL. I will publish a video on it in the near future. Best, Don
@@RestoreOldRadios Thanks for the response Don. Thank you for showing your secrets.
Wow!
Thank you much. Best, Don
The wire to replace is 7 strand but it looks like you are going to replace it with a 10 strand. Did you mean to state you will use 7/44 litz wire??
Also what tool do you use to measure the diameter of the wire to see what awg wire to use? I need to get one of those tools.
SanLiang Digital Electronic Micrometer Set Measuring Tool 0-1 Outside Premium Inch/Metric Precision Machinist Caliper with Case and Extra Battery (Basic 0-1"(0-25mm)) a.co/d/bqUoChn
I used 10 strand I had on hand to keep my expenses in check. Best, Don
How many turns did it take to finish the coil.
Looking back at the video, I stopped winding at 360 turns. I don’t recall if I had to remove any turns afterwards to get the desired inductance. Hope this helps. Best, Don
Thanks' for replying yes that is very helpful . Regards Bob👍.@@RestoreOldRadios
I'm telling your wife LOL
John, I’ve already been caught LOL. No more chocolate in that one. Best, Don