Oops! In response to my post below, Eric dropped me this note: " Ron - you forgot about the hole around 8.215."
He's quite right, of course. The K3's first I.F. is at 8.215 MHz has some tremendous advantages over receivers with a higher I.F. but it does mean that receiver coverage does not cover the area near that frequency. See "Theory of Operation" in the K3 Owner's manual (available on the Elecraft WEB site for more details about the advantages of the K3's I.F. schema). Ron AC7AC ---------------------------- If you have the KBPF3 optional (general coverage) input filter installed, you will have consistent reception from 500 kHz up through 30 MHz and again across the 6 meter band (48 to 54 MHz). Note that the KBPF3 is a filter at the antenna input (not the I.F.) to provide coverage in the gaps between the Ham bands. The K3 tunes the entire range with or without out it, but sensitivity will suffer once you tune well outside a Ham band without it since the 'stock' input filters are designed to provide optimum performance only across the Ham bands. Ron AC7AC -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Marc Sent: Friday, April 22, 2011 11:32 AM To: [email protected] Subject: [Elecraft] SWL question I am an avid SWL'er and use the K3 to listen to SW broadcast stations and wefax. Somewhere posted are the curves or ranges that the general coverage receiver offers. Im looking for these posts - more info about the general coverage receive option. I hear that sometimes the general coverage option shares low pass filters with the ones that the option adds. Take 25mhz WWV for example or 6 mhz broadcast stations. My question is what filter scheme is employed for these frequencies I have mentioned and what should I expect rx wise in these ranges as a result of that. Marc, KE2BP ______________________________________________________________ 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
