Reply To: Cold Solder Joint – Cyl 1 Coil

[John Gragg]

So I, unfortunately, was correct. This coil is toast and someone has tried to make it work. I removed the solder very carefully and pulled the plug wire away from the coil. There was no wire coming from the coil, just a tiny pin hole where the ‘button’ should be. Used my magnifying glass to try to find something there, and no dice. Common sense says there needs to be an electrical lead coming out of the coil, so to test this I removed the solder from the good coil. Yes, inside of the solder ‘button’ is a wire coming out of the coil. Soldered it back in place and tested. Back to zero on Primary and 7.65K on the Secondary.

Went back to the problem coil and dug a little further, removing a bit more of the solder. Just a hole in the coil, no wire. Although this motor appears to be very much unmolested, someone has tried to effect a repair and missed the mark.

Luckily, I sourced a used coil last night and (I hope I didn’t get ripped off) two new replacement coils. An old post on this site gave me the superseded part number for the original number.  Don’t remember the original number, but the new number is 375189 (580084 comes to mind?). I guess these coils were put in a multitude of different motors of that era.

Aquasonic – Thanks for the reminder. No flux (flux equals acid, acid is bad). I have the rosin core solder, so all is well there!

Thanks!

John Gragg
RIverside, CA

Just starting in the hobby, please be patient.

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