> (In an extreme case, you could even be > exceeding the useful range of the TR switch PIN diodes. The FT817, if > I'm not mistaken, uses a TR relay.)
Some "scratch-paper" calculations in a 50-ohm system: Assuming it really is the T/R PIN diodes, they would conduct at just under one volt. In a 50-ohm system (and highly dependent on the PIN configuration), that's roughly a 10 dBm signal -- or stated another way, 10 mW of power dissipated at the Rx front end. It would be an interesting exercise to momentarily bypass the T/R PIN diodes and re-test with the same driveway setup. So, even if this really is the cause, it would probably be a safe assumption that the K3 will still handle strong signals far better than most other receivers -- until an outrageously high value begins conducting PIN diodes. That solution might call for replacement of the solid-state T/R with a relay. Thanks, but "no thanks." Paul, W9AC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
