My apologies for my note yesterday on this subject, it was incorrect.
I have just been informed by one of the Elecraft engineers that I erred in my statement that the K3 filters could be in any order, so Bill was right. See Dick's comments to me below. I did not see that note in my early K3 manual which does state that the filters can be installed in any order - I did not read the remainder of the note.
Also note that if you have the 13kHz filter, it must be in the FL1 slot. 73, Don W3FPR On 11/24/2019 8:49 AM, Dick Dievendorff wrote:
Don, FYI: K3/K3S crystal filters should always be installed in descending width order. See K3S owner's manual, "rule #2" near the bottom of page 85. The second example shows FL1 empty. There is a similar discussion near the top of page 7 of the K3 "Installing Crystal IF Filters" document and the bottom of page 77 of the K3 owner's manual. The FM transmit filter is hard-coded as FL1. So if you need FM transmit, a 13 kHz FM filter has to be in FL1. 73 de Dick, K6KR
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