Reply To: Cold Solder Joint – Cyl 1 Coil

[aquasonic]

Hi John. These solder joints are hot solder joints and are common to the “horseshoe coils” from the 1940’s.

I suspect that the high resistance readings were likely caused by a little oxidation on the solder joint preventing a good connection to your ohm meter. When you pressed a little bit harder, you found that you did have a connection. It’s likely fine.

Under the solder joint is the coil button. The solder makes the connection from the button to the plug wire. I would not advise to disassemble the connection unless you need to put on new plug wires, but if you do use the heat of the solder gun to disassemble.

I have successfully soldered some of these connections, but the windings are very delicate, and too much heat from the solder gun can ruin the coil. My first attempt ended badly, but successive attempts have been successful.

Hopefully this helps, and you can go forward to the next thing to maintain.

 

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