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Ivecseen a similar issue with old zenith radios that have a silver sided cap in the can. They oxidize and short out causing smoke to escape. This particular can is located up front inside one of those shield covers. Its on the same side as the output. It may very welk be associated with both rx and tx. I will check the schematic and make a list of the coil cans that are along the path. There are a few small flat green disk caps that come off the collector emitter on the final and on that same bus all the way to the pl259. I am able to check very small caps up to 20uf and down to the pico so i will check all that. I do have new cans but not sure what the windings are or the value of the internal cap. I bet those trimmers work way better than the factory because you can really align them for any variation within the coil from age. Cool.

73s

[QUOTE="vswr, post: 822280, member: 65906"] Ivecseen a similar issue with old zenith radios that have a silver sided cap in the can. They oxidize and short out causing smoke to escape. This particular can is located up front inside one of those shield covers. Its on the same side as the output. It may very welk be associated with both rx and tx. I will check the schematic and make a list of the coil cans that are along the path. There are a few small flat green disk caps that come off the collector emitter on the final and on that same bus all the way to the pl259. I am able to check very small caps up to 20uf and down to the pico so i will check all that. I do have new cans but not sure what the windings are or the value of the internal cap. I bet those trimmers work way better than the factory because you can really align them for any variation within the coil from age. Cool. 73s [/QUOTE]

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