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Yesterday I went to 18 MHz SSB to work K5D - not. There were some periodic real quiet audio gaps in the 17M band. Hmmm? When I switched from the 2.7 filter to my 2.1 the gaps disappeared, and switching to CW mode also filled the band with sigs. If allowed to warm up some, the receiver problem went away in SSB mode.
E-mailed Gary at Elecraft Support for suggestions. Within only 10 min he responded that I should do a VCO CAL (Manual, p. 49), and check to see if I had the mod resistors added to my KSYN3 boards. I did the CAL to both receivers and all was well again. Still ok today. Not sure why but the procedure worked for me. Still need to check for the resistor mods, but they are likely there as the rig was just back to the factory a month ago for a tune-up.
No where else but with Elecraft have I found such good support and helpful folks 100% of the time. Thank you Gary.
73 Gary NL7Y
(BTW finally got em' on 40CW later in a big fun pileup)
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