Think of the amount of watts it would take to make a coax conection just
warm to the touch. Judging from what 75 watts feels like from a light
bulb, which can quickly burn the skin or scorch paper from a distance of a
couple of inches from the filament, probably just a few watts would do
it. With 1kw under consideration, it is probably normal heating due to
loss within the connector. Same with the switch. Relatively few watts,
fractions of a db at 1kw will produce sometimes surprising amounts of
heat, at connectors or switches or even inside the run of coax. I
understand that at HF, the lossiest part of the coax is the center
conductor, which is thermally well insulated, and the trapped heat should
be easily felt at the surface of the coax, with 1-1.5 kw...
73, DX, de
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