You bring up the interesting question of configuration for the narrow filter -- i.e., where do you set it to "kick in"? I opted for 1.9 kHz, you opted for 2.1 kHz. I'm curious as to where others have configured the 1.8 kHz SSB filter to kick in -- and why.
Bill W5WVO -------------------------------------------------- From: "Philippe Trottet" <trot...@unhcr.org> Sent: Monday, January 11, 2010 10:05 PM To: <elecraft@mailman.qth.net> Subject: Re: [Elecraft] [K3] Want to buy a K3 > Fully confirm this assessment ! > The 1.8Khz 8 pole in a congested environment is a must. I have it in > addition of the 2.8Khz. > Considering the H polar of my 40m antenna receiving signals from the close > East, most are regular Ham's from ex-USSR area and also very active > pirates on that side, up to 59 +30 is common. > Sometime ago two of those big guns were respectively on 7.085 and 7.090 > with certainly old amplifiers spreading their signal several KHz away from > the normal spectrum with saturated audio, I've just clicked on the 1.8Khz > filter and as Bill says, FC to 1.05~1.10 and was able to listen clearly > and do the contact with JA8BOF on 7.088. > Just a trick, to program with the Elecraft utility the1.8Khz filter, > starting from 2.1Khz. > When listening with the 2.8 moving the width down will activate > automatically at 2.1Khz the 1.8 filter, it is helpful. > 73's > Philippe A65BI > http://www.qrz.com/callsign/A65BI > K3#3616 > " By Ham's, For Ham's...What else ! " > > ( http://www.qrz.com/callsign/A65BI ) > >>>> "Bill VanAlstyne W5WVO" <w5...@cybermesa.net> 12-01-2010 6:53 >>> > One thing the other posters have not mentioned (probably not being SSB > types) is a narrow filter for SSB. I have the 1.8 kHz 8-pole filter, and > it > is amazing. You do have to reduce the hi-cut a bit to center the voice in > the narrower passband (an FC of 1.05 is about ideal for most male voices). > What you get is remarkable immunity from overload by extremely strong, > close-in signals (providing of course that they aren't actually > splattering, > which you really can't do anything about). For SSB contest work, this > filter > is a must. If you don't work SSB much and/or aren't at all interested in > SSB > contesting/DXing, then you can probably skip it. But for me it's been a > terrific addition. > > Bill W5WVO > > -------------------------------------------------- > From: "John W2XS" <jm...@optonline.net> > Sent: Monday, January 11, 2010 2:28 PM > To: <elecraft@mailman.qth.net> > Subject: Re: [Elecraft] [K3] Want to buy a K3 > >> >> You will get many opinions on this. Here's mine. I am primarily a CW >> operator but I like to listen to AM BCB and Shortwave stations. My >> antenna >> is a multi-band Cobra Ultralite fed with ladder line and a Balun Designs >> 4:1 >> Tuner Balun. >> >> 1. KAT3 Tuner. If you have matched, coax-fed antennas, then you may not >> need this. But it is a great addition to those of us with multi-band >> antennas. It remembers the settings on small segments of each band which >> is >> incredibly convenient for QSYing, especially on 160m. >> >> 2. KBPF3 General Coverage Filter. If you stick only to the ham bands, >> then >> you may not need this. But it was on my "must-have" list (as was the >> KAT3). >> I have all 100 memories filled with short-wave and AM BCB stations all >> over >> the frequency spectrum. I've been listening to Radio China and Radio >> Cairo >> a >> lot lately. >> >> 3. KPA3 100W Amplifier. Many people start out with the 10W option. I >> have >> had a lot of success with the K2 at 10W. But I wanted the K3 to be my >> "QRO" >> rig as it replaced a Kenwood TS-930S (which is a fine but aging rig). >> >> 4. KRX3 Sub receiver. I added this after a year and find it is >> incredible >> for working split-frequency DX stations. I cannot see ever going back to >> the "push the TF Set" button days to try and figure out where the heck >> the >> DX station is listening. If you are not a DXer, or don't care about >> diversity reception, etc, then you may not need this. >> >> 5. Filters. This was (and is) a hot topic. But I stand by my initial >> decision, which was: >> >> A. 200 and 500 Hz 5-pole filters. There was an early posting that said >> that >> only the first 30 dB of slope is critical, and that a 5-pole filter would >> be >> more than enough. I went with that, and am happy. There probably is some >> (small and subtle?) difference between the 5-pole and 8-pole performance, >> but the main purpose of a roofing filter is to prevent the DSP (the main >> selectivity in the rig) from overloading. Signals are generally weak >> right >> now, but will start to get stronger as conditions improve. It is >> amazing, >> though, to crank that knob down to 500 and then to 200 and know that >> there >> is no chance for any out-of-bandpass signal to get through. >> >> B. 2.7 kHz SSB filter. This comes standard. This is the only filter >> that >> I >> have in the sub receiver right now. I based that decision on wanting to >> hear >> a wide bandpass most of the time to hear the station that the DX is >> working. >> >> C. AM filter. This is a little bit disappointing to me as I thought that >> I >> would use this a lot. But I almost never use it. Unless you are >> interested >> in AM transmission or ESSB transmission, you might skip this one. >> >> D. FM filter. This is the one that I use for all my AM listening. I wish >> they offered a less-expensive filter for receiving only. >> >> You can always buy the minimum configuration now and add later. A real >> big >> advantage of the K3 over most other rigs today is the roofing filter >> concept, and signals will be getting stronger as conditions improve, so >> think about getting at least one or two optional roofing filters to start >> with. >> >> Good luck and 73, >> >> John W2XS >> >> >> What elective boards should I consider purchasing to enhance the >> functionality of the K3. >> -- >> View this message in context: >> http://n2.nabble.com/Want-to-buy-a-K3-tp4287275p4288261.html >> Sent from the [K3] mailing list archive at Nabble.com. >> ______________________________________________________________ >> 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 >> > > ______________________________________________________________ > 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 > ______________________________________________________________ > 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 > ______________________________________________________________ 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
