Jump to: 00:01 / Review of Part 3 - Discovering THE problem 01:46 / Removing the audio output transformer from the speaker basket 03:38 / Inspecting the audio output transformer 03:48 / Testing the secondary winding posts for resistance/continuity 04:00 / Checking the voice coil on the speaker 04:19 / Getting into the primary winding of the output transformer - observations 07:00 / More testing of the secondary winding posts - Hmm..? 08:14 / Getting into the secondary winding of the output transformer - uh oh! 09:23 / Speaker coil windings and the way the schematic is drawn - there's a humbucker... 10:41 / Working on repairing the winding on the output transformer 11:55 / Using epoxy to secure the leader wires for the primary winding 15:32 / Clarifying the schematic - the humbucker and how it is really wired vs the drawing 17:37 / Testing the repair with jumpers to the speaker - using the Heathkit IG-72 audio generator. It works! 19:06 / Preview of Part 5
Thanks! If you liked that one, here is one where I dig "a little deeper". ruclips.net/video/q1DQVaXReX8/видео.html Hope you enjoy that, it shows you don't need a lot fancy equipment but some old tools and some rusty junk certainly helps. Thanks again to you! 73
Howdy. Yep! Got lucky on this one. The horseshoe was embedded a bit deeper on the Emerson 641B radio repair video series Part 2 (ruclips.net/p/PLm_BfKDA0rpOk4ML1MQQnAjb_JJCDifpl&si=w8vemeBVVqgW83Pb). But the ol' farrier was able to dislodge the shoe with the the help of improper tools and a bunch of rusty junk. Check out the video entitled: "Audio Output Transformer Project, Save Me! - or - How I learned to Stop Worrying and Love Rebuilding Transformers". Was awarded extra points by "Fibber's Closet" for using a bait cast reel. Thank you for the kind comment.
![Rebuilding the Audio Section - Will the Radio Work Now? 1937 Grunow Part 5 [4K]](http://i.ytimg.com/vi/hBsRFzFEH0o/mqdefault.jpg)
![Rebuilding the Audio Section - Will the Radio Work Now? 1937 Grunow Part 5 [4K]](/img/tr.png)
Jump to:
00:01 / Review of Part 3 - Discovering THE problem
01:46 / Removing the audio output transformer from the speaker basket
03:38 / Inspecting the audio output transformer
03:48 / Testing the secondary winding posts for resistance/continuity
04:00 / Checking the voice coil on the speaker
04:19 / Getting into the primary winding of the output transformer - observations
07:00 / More testing of the secondary winding posts - Hmm..?
08:14 / Getting into the secondary winding of the output transformer - uh oh!
09:23 / Speaker coil windings and the way the schematic is drawn - there's a humbucker...
10:41 / Working on repairing the winding on the output transformer
11:55 / Using epoxy to secure the leader wires for the primary winding
15:32 / Clarifying the schematic - the humbucker and how it is really wired vs the drawing
17:37 / Testing the repair with jumpers to the speaker - using the Heathkit IG-72 audio generator. It works!
19:06 / Preview of Part 5
Great demo. Too many are reluctant to dig into transformers. Thanks, 73. b.
Thanks! If you liked that one, here is one where I dig "a little deeper".
ruclips.net/video/q1DQVaXReX8/видео.html
Hope you enjoy that, it shows you don't need a lot fancy equipment but some old tools and some rusty junk certainly helps. Thanks again to you! 73
Nice repair. How lucky can one guy be? Btw, you can have that horseshoe removed surgically at any livery stable in the wikd west.
Howdy. Yep! Got lucky on this one. The horseshoe was embedded a bit deeper on the Emerson 641B radio repair video series Part 2 (ruclips.net/p/PLm_BfKDA0rpOk4ML1MQQnAjb_JJCDifpl&si=w8vemeBVVqgW83Pb). But the ol' farrier was able to dislodge the shoe with the the help of improper tools and a bunch of rusty junk. Check out the video entitled: "Audio Output Transformer Project, Save Me! - or - How I learned to Stop Worrying and Love Rebuilding Transformers". Was awarded extra points by "Fibber's Closet" for using a bait cast reel. Thank you for the kind comment.
The way your shaking, I wouldn’t be handling anything sharp or pointy.
Hello Jim, and thanks for stopping by. I have enjoyed many of your videos, and your cabinet finish work is especially fine. Take care.