Can someone explain why this restriction exists? *Why* can't you transmit through a 2.1 filter for example. *Why* is it precluded?
I don't want a 2.7 or a 2.8 filter tying up one of the too few filter slots. W5OV -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Joe Subich, W4TV Sent: Friday, October 08, 2010 11:07 AM To: [email protected] Subject: Re: [Elecraft] K3: FM Filter for AM? On 10/8/2010 9:30 AM, Don Wilhelm wrote: > > You can use the FM filter to receive AM, but not for transmit. To > transmit AM, you must have the 6 kHz filter, so you will have to > sacrifice one filter. Repeating one of my complaints about the K3 .... there is no reason that the FM filter should not be usable for AM (or ESSB) transmit. The filter response is well into its stopband for the IF image. I've checked both of my K3s on a spectrum analyzer (by telling the K3 the FM filter was 6 KHz wide) and there is no measurable/detectable transmit image. 73, ... Joe, W4TV On 10/8/2010 9:30 AM, Don Wilhelm wrote: > Bill, > > You can use the FM filter to receive AM, but not for transmit. To > transmit AM, you must have the 6 kHz filter, so you will have to > sacrifice one filter. > > 73, > Don W3FPR > > On 10/8/2010 9:11 AM, Bill Henderson wrote: >> Hi >> >> I already have the 250Hz, 400Hz and 2.7 KHz filters fitted to both >> receivers. I plan to add 2.1KHz or 1.8kHz filters some time I in the future. >> >> In the nearer future I intend adding the 2m module to my K3. Since this will >> be used for local traffic I understand that I need to add an FM filter on >> the main receiver. Since this is a wide filter can I use it for AM as well? >> If not then I would "need" 6 filters with only 5 slots available. >> >> I am a black box operator. If I find more than one switch on that box I >> burst into tears. So please bear this in mind in your answers. >> >> Tia >> >> Bill >> GM0VIT >> > ______________________________________________________________ > 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 ______________________________________________________________ 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 ______________________________________________________________ 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
