03-19-2023, 06:41 PM
Thompson speaker update:
The good news is I can see what used to be a red tracer color in one of the wires so would assume that's the + side. The bad news is that checking the ohms across the wires (also checked at the connection points) shows a complete open. I then checked between one lead and the center connection between the two coils shown with the arrows, also open from either end. My conclusion is that both of those coils are open and I think that may be a very difficult fix. I suppose I could disassemble everything and try to rewind the coils
Has anyone tried anything like that?
[those lines on the bottom and top right are reflections of the window blinds in my shop. I was using a magnifying lens to light and magnify the image]
[Image: https://www.dropbox.com/s/2mvu3s5fwvw6lt....jpg?raw=1]
I decided to take a quick look at the Stewart Warner 415 speaker and found that the resistance across its two leads was 5 to 7 Meg so something isn't right there either. Getting into this speaker is not as easy as the first. The front and back are fitted onto the body and secured with two rivets. The back was missing one rivet and the other was partially out so I was able to work it out and get the back off. Unfortunately that doesn't give me much access. The workings are on the other side. I was able to re-seat the gasket however. I now have to decide whether to try and dremel grind off the rivets for the front without damaging it and whether its worth it or not.
[Image: https://www.dropbox.com/s/41r4kom1enh9yd....jpg?raw=1]
[Image: https://www.dropbox.com/s/51rvq8yfgnwifu....jpg?raw=1]
The good news is I can see what used to be a red tracer color in one of the wires so would assume that's the + side. The bad news is that checking the ohms across the wires (also checked at the connection points) shows a complete open. I then checked between one lead and the center connection between the two coils shown with the arrows, also open from either end. My conclusion is that both of those coils are open and I think that may be a very difficult fix. I suppose I could disassemble everything and try to rewind the coils
Has anyone tried anything like that?[those lines on the bottom and top right are reflections of the window blinds in my shop. I was using a magnifying lens to light and magnify the image]
[Image: https://www.dropbox.com/s/2mvu3s5fwvw6lt....jpg?raw=1]
I decided to take a quick look at the Stewart Warner 415 speaker and found that the resistance across its two leads was 5 to 7 Meg so something isn't right there either. Getting into this speaker is not as easy as the first. The front and back are fitted onto the body and secured with two rivets. The back was missing one rivet and the other was partially out so I was able to work it out and get the back off. Unfortunately that doesn't give me much access. The workings are on the other side. I was able to re-seat the gasket however. I now have to decide whether to try and dremel grind off the rivets for the front without damaging it and whether its worth it or not.
[Image: https://www.dropbox.com/s/41r4kom1enh9yd....jpg?raw=1]
[Image: https://www.dropbox.com/s/51rvq8yfgnwifu....jpg?raw=1]
