On the K3 order page you will find:
KFL3A-1.0K 1 kHz, 8-pole roofing filter _____ From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Thursday, February 05, 2009 6:44 AM To: 'ElecraftList' Subject: [Elecraft] [K3] Elecraft roofing filters Dear all, In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I see the two sentences: "Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up." Can anyone point me to a place that can tell me what "the 1.0 kHz crystal filter" is, where to obtain one and when it is worth using? Vy 73 OZ1CCM Kjeld
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