At 15MHz you are starting to be out of the 20M passband filter, at 16MHz you are well out of the 20M pass band,,, the passband on 10M is around 2 or 3MHz wide and thus would provide the proper drive level for 144 (28MHz), 145 (29MHz), and 146 (30MHz) MHz operation.
From the K3 users manual, pp71: Band-Pass Filters (BPFs) At back-left is the bank of ham-band BPFs. These filters are just wide enough to cover each ham band, so they provide good rejection of IMD products during both transmit and receive. Hi-Q components, including large toroids, ensure low loss and high signal-handling capability. Regards de Ben W4SC Sent from Mail for Windows 10 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
