12-23-2016, 12:42 PM
Hi Jim.....
I just finished rewinding 2 coils out of a Model 84.....the Ant. and Osc. coils. Both the primaries had the "Green Gunge". This is a chemical reaction between the silk covered #36 primary coil and the celluloid underlay. Moisture, I'd assume, would be a factor in this.
Use #36 enamel wire as a replacement. Don't worry about the turns needed.....measure the width of the old coil with a micrometer, remove the old wire, lay in the new to the same width dimension. Remember, the new wire has to be laid in the same direction as the old! And, be careful around the celluloid....it pretty fragile if you want to keep it. Doing the whole job under an illuminated magnifying lamp would make the going a lot easier. (wish I had one!)
Good luck with the project and all of us here are expecting a full report when you're finished.
A Merry Christmas and a Happy Near Year!
...Jim
I just finished rewinding 2 coils out of a Model 84.....the Ant. and Osc. coils. Both the primaries had the "Green Gunge". This is a chemical reaction between the silk covered #36 primary coil and the celluloid underlay. Moisture, I'd assume, would be a factor in this.
Use #36 enamel wire as a replacement. Don't worry about the turns needed.....measure the width of the old coil with a micrometer, remove the old wire, lay in the new to the same width dimension. Remember, the new wire has to be laid in the same direction as the old! And, be careful around the celluloid....it pretty fragile if you want to keep it. Doing the whole job under an illuminated magnifying lamp would make the going a lot easier. (wish I had one!)
Good luck with the project and all of us here are expecting a full report when you're finished.
A Merry Christmas and a Happy Near Year!
...Jim
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