Vic and all who replied, I kind of cheated when I made my inquiry. I omitted the fact that I was actually asking about copying eme CW (though some of you may have guessed). I am the only station in Alaska that regularly operates 2m-eme. Since Alaska counts both for WAS and DXCC that makes me in demand.
I have not operated CW eme for a long time, but am about to start up again (I have mainly operated digital eme since 2003). One of the main reasons for my K3 purchase was operating CW eme. (I also use it on 500-KHz) In the past I was using my FT-847 which only has the 2.2-KHz SSB filter. I used the DSP CW filter on 400-Hz for searching for signals and then narrowed down to either 200 or 100-Hz (the FT-847 DSP is not variable and provides only 400/200/100/25 Hz filtering). My hearing is bad and I wear hearing aids full-time, so I can not dig out weak signals as well as some. Narrowing bandpass is essential. I have not tried to copy CW eme with the K3, yet. I am waiting for my new DEMI 144/28 transverter. But I did experiment listening to weak CW on 20m and tried out the APF feature. It works super! I am looking forward to trying it out on eme. This coming weekend is the annual 432 & 1296 SSB eme event (not really a contest), so I am trying to get set up for that. There will be both CW and SSB signals to listen to. Unfortunately, I found that one of my FET's is bad in my 1296 amplifier so I will not be transmitting. But it should be fun listening into all the stations. I have a 1296/28 transverter to use with the K3. 73, Ed - KL7UW ------------------------------ Message: 11 Date: Wed, 09 Feb 2011 08:13:19 -0800 From: Vic K2VCO <v...@rakefet.com> Subject: Re: [Elecraft] adding 250Hz filer, any improvement? To: elecraft@mailman.qth.net Message-ID: <4d52bd1f.8030...@rakefet.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed I see that others have told you that you can narrow the DSP and it will be just as good as long as there are no nearby signals greater than about S9+20. Let me add that a huge improvement in copyability of weak CW can be gained by using the APF in current firmware. It has a bandwidth (I believe) of about 30 Hz at 6 dB points, and also provides a slight gain boost. It's easiest to select 1 Hz tuning steps (tab 'fine') when tuning with it on. I usually use a DSP bandwidth of 300-400 Hz and APF on when copying really, really weak signals. I know there are guys like W4ZV who have a DSP between their ears that does a better job with wider bandwidths, but not all of us have this ability! 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.com ====================================== *temp not in service ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
