[Elecraft] 1 Khz filter
Looking for a 1 khz filter. Marv KG7V __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] 1 Khz filter
I still cannot imagine using that wide of a filter on CW during crowded band conditions however everyone has their preference. I was curious what the 1khz filter was used for so I posted the question. The popular answer was CW. 500Hz max is plenty wide for me and in a contest and I often have other stations running on my filter edges. The same thing occurs on RTTY. For non-contest expedition style operating I prefer to use the RIT when too many stations call zero beat. John KK9A aka P40A, WP2AA etc Bill Breeden wrote: Wed Jul 26 12:09:57 EDT 2017 Jim, I think most K3 owners understand that. Those who call CQ during crowded band conditions also understand that their ears will take less of a beating when using a 1 kHz DSP bandwidth in conjunction with a 1 kHz roofing filter instead of the next wider roofing filter, which, in a K3 is often a 2.7 or 2.8 kHz filter. That's the wonderful thing about a K3, the owner can equip it according to his or her personal preference. My ears have taking enough beatings over the years from stations outside of the filter bandwidth pumping the AGC while using lesser receivers to know that I prefer a tight roofing filter bandwidth so that the stations outside of my DSP bandwidth have minimal effect on what I am hearing. I have used my "Field Day" K3 to call CQ during crowd banded conditions before and after I added the 1 kHz filter and have found the improvement well worth the price of the filter. Your mileage may vary. 73, Bill - NA5DX On 7/25/2017 10:08 PM, Jim Brown wrote: > On 7/25/2017 7:11 PM, Bill Breeden wrote: >> I found that I was missing stations that were calling on the skirts >> of my 400 Hz filter, so I added a 1 kHz filter. When I tune the band >> to answer CQs I still prefer listen through the 400 Hz filter. > > It's important to remember that IF bandwidth is determined by DSP, and > continuously adjustable. The plug-in filters are ROOFING filters -- > their primary function is to protect the DSP from overload by very > strong stations outside the bandwidth of the DSP IF. They have the > secondary function of adding the filtering provided by the DSP, and > when the DSP and the roofing filter are at the same bandwidth, the > filter skirts become steeper (sharper). > > Bottom line -- we don't need to buy a 1 kHz filter to get 1 kHz IF > bandwidth, because the DSP already provides that. This is not your > grandfather's radio! :) > > 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
On 7/26/2017 9:09 AM, Bill Breeden wrote: I have used my "Field Day" K3 to call CQ during crowd banded conditions before and after I added the 1 kHz filter and have found the improvement well worth the price of the filter. Your mileage may vary. While this is certainly a matter of operating preferences, my preference is not to bother with callers more than a few hundred Hz off frequency for at least three reasons. First, I've tried to protect my CQ frequency by keeping it active. If I work someone widely displaced, my frequency is unprotected while they're transmitting. Second, if they're that far off frequency, they're likely to be getting QRMed by a station on their frequency, which makes them hard to copy. Third, if they're that far off frequency, they're more likely to be lids, and thus more likely to take forever to finish a QSO. For the same reasons, I won't respond to someone signing /QRP. Not because I don't want to take the time to work a weak station, but because that station signing /QRP is likely to be a lid. Indeed, by sending /QRP he/she is wasting time doing so by sending un-necessary information. I work a LOT of QRP, especially during DX contests, with more than 160 countries confirmed, but I've never signed /QRP. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
Jim, I think most K3 owners understand that. Those who call CQ during crowded band conditions also understand that their ears will take less of a beating when using a 1 kHz DSP bandwidth in conjunction with a 1 kHz roofing filter instead of the next wider roofing filter, which, in a K3 is often a 2.7 or 2.8 kHz filter. That's the wonderful thing about a K3, the owner can equip it according to his or her personal preference. My ears have taking enough beatings over the years from stations outside of the filter bandwidth pumping the AGC while using lesser receivers to know that I prefer a tight roofing filter bandwidth so that the stations outside of my DSP bandwidth have minimal effect on what I am hearing. I have used my "Field Day" K3 to call CQ during crowd banded conditions before and after I added the 1 kHz filter and have found the improvement well worth the price of the filter. Your mileage may vary. 73, Bill - NA5DX On 7/25/2017 10:08 PM, Jim Brown wrote: On 7/25/2017 7:11 PM, Bill Breeden wrote: I found that I was missing stations that were calling on the skirts of my 400 Hz filter, so I added a 1 kHz filter. When I tune the band to answer CQs I still prefer listen through the 400 Hz filter. It's important to remember that IF bandwidth is determined by DSP, and continuously adjustable. The plug-in filters are ROOFING filters -- their primary function is to protect the DSP from overload by very strong stations outside the bandwidth of the DSP IF. They have the secondary function of adding the filtering provided by the DSP, and when the DSP and the roofing filter are at the same bandwidth, the filter skirts become steeper (sharper). Bottom line -- we don't need to buy a 1 kHz filter to get 1 kHz IF bandwidth, because the DSP already provides that. This is not your grandfather's radio! :) 73, Jim K9YC __ 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 Message delivered to breede...@cableone.net __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
I am a CW operator and I have 2.8kHz, 1kHz, 400Hz and 200Hz filters in my K3. I think this is serious overkill (especially since I have another similar set in the subreceiver). The function of the crystal filters is to allow you to operate closer than (roughly) the filter bandwidth to a signal that is S9+20 dB or more without the interfering signal having any effect on the desired signal. The continuously adjustable DSP filter is a brick wall for undesired signals weaker than that. But stronger signals can activate the hardware AGC in the K3 or K3S and cause desensitization even though the QRM is outside the DSP bandpass. The optimum situation is to have a filter whose bandwidth is close to or slightly wider than the DSP bandwidth that you are using. So if you often operate with the DSP bandwidth set to, say, 900Hz, having a 1kHz filter would be convenient. If you only had the stock 2.7 kHz filter, then an undesired S9+20 dB signal 1 kHz away from the signal you are listening to might cause the sensitivity of the receiver to vary and thus interfere with your ability to copy, even though you wouldn't hear the interfering signal. So it depends on your operating habits. Since I am in the habit of listening to CW with the DSP set to 400Hz or below, the 1kHz filter doesn't do anything for me. I also think the value of the 200 Hz filter is marginal, although it has been helpful at times (like when a super-strong station one hop away from me is trying to deliberately QRM a DX station but is not exactly on the DX frequency). 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO http://www.qsl.net/k2vco/ On 25 Jul 2017 22:49, j...@kk9a.com wrote: What is this used for? John KK9A From: Ralph Matheny K8RYU Mon Jul 24 16:30:29 EDT 2017 Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
On 7/25/2017 7:11 PM, Bill Breeden wrote: I found that I was missing stations that were calling on the skirts of my 400 Hz filter, so I added a 1 kHz filter. When I tune the band to answer CQs I still prefer listen through the 400 Hz filter. It's important to remember that IF bandwidth is determined by DSP, and continuously adjustable. The plug-in filters are ROOFING filters -- their primary function is to protect the DSP from overload by very strong stations outside the bandwidth of the DSP IF. They have the secondary function of adding the filtering provided by the DSP, and when the DSP and the roofing filter are at the same bandwidth, the filter skirts become steeper (sharper). Bottom line -- we don't need to buy a 1 kHz filter to get 1 kHz IF bandwidth, because the DSP already provides that. This is not your grandfather's radio! :) 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
I added a 1 kHz filter to my "Field Day" K3 for the same reason, and I really like it. When calling CQ on CW during Field Day a lot of folks who answer are using radios they aren't very familiar with and as a result they aren't zero beat very accurately when they call. I found that I was missing stations that were calling on the skirts of my 400 Hz filter, so I added a 1 kHz filter. When I tune the band to answer CQs I still prefer listen through the 400 Hz filter. 73, Bill - NA5DX On 7/25/2017 8:07 PM, Merv Schweigert via Elecraft wrote: Same here, perfect for contesting on CW, I like to be able to hear almost up to a KC up the band to pick up those who cannot zero beat, I have 400 and 200 filters also, but only use them for extreme conditions, Merv K9FD/KH6 Hello John, It's used for CW. I have a pair of them (main and sub rx) and find that CW sounds more pleasing through this filter. I operate about 90% CW and I use this filter most of the time, engaging narrower filters only when it becomes really necessary. 73, Dale -- WA8SRA On Tue, Jul 25, 2017 at 3:49 PM, j...@kk9a.comwrote: What is this used for? John KK9A From: Ralph Matheny K8RYU Mon Jul 24 16:30:29 EDT 2017 Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to dmbor...@gmail.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 Message delivered to k...@flex.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 Message delivered to breede...@cableone.net __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
Hello John, It's used for CW. I have a pair of them (main and sub rx) and find that CW sounds more pleasing through this filter. I operate about 90% CW and I use this filter most of the time, engaging narrower filters only when it becomes really necessary. 73, Dale -- WA8SRA On Tue, Jul 25, 2017 at 3:49 PM, j...@kk9a.comwrote: > What is this used for? > > John KK9A > > From: Ralph Matheny K8RYU > Mon Jul 24 16:30:29 EDT 2017 > > > Anybody got a 1 Khz filter for K3 they wanna sell?? > > de K8RYU > > __ > 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 > Message delivered to dmbor...@gmail.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 Message delivered to arch...@mail-archive.com
[Elecraft] 1 Khz filter
What is this used for? John KK9A From: Ralph Matheny K8RYU Mon Jul 24 16:30:29 EDT 2017 Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] 1 Khz filter
Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] 1 kHz Filter for K3
Is anyone using the 1 kHz filter in the K3 subreceiver for CW? Any pros or cons? Mike, W4UM __ 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
Re: [Elecraft] 1 kHz Filter for K3
I use a 1k filter in the main radio. It would make no difference which receiver is was installed into. I use it quite a bit especially for turning the bands looking for dx or mults. When conditions get tough I switch in the narrower filters as needed. You probably want a 400 in addition to the 1k. Flexibility is the key. CC Packet Cluster W0MU-1 W0MU.NET or 67.40.148.194 A slip of the foot you may soon recover, but a slip of the tongue you may never get over. Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Michael M. Raskin Sent: Sunday, February 14, 2010 12:27 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 1 kHz Filter for K3 Is anyone using the 1 kHz filter in the K3 subreceiver for CW? Any pros or cons? Mike, W4UM __ 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
Re: [Elecraft] 1 kHz Filter for K3
On 2/14/2010 11:26 AM, Michael M. Raskin wrote: Is anyone using the 1 kHz filter in the K3 subreceiver for CW? Any pros or cons? I have one in the main rx. I got it on the grounds that I would use it in contests when running, setting the bandwidth to about 800 Hz. to catch off-frequency callers. In fact I find that 400 Hz works best, because there are usually loud stations close by! It's nice to have, but not as essential as I'd thought. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ 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
Re: [Elecraft] 1 kHz Filter for K3
Vic,I am using the 1K roofer as well as the 1.8, 2.8, 6.0 and of course for CW as well the 500Hz. I use my 1Khz mainly for safe ragchewing on CW and also for brick selectivity on SSB but when your use it on voice,you must move the SHIFT to 050 to recover the inteligibility,its very effective reducing qrm from stations at less than 2Khz apart. AD4C For a refined ham it is compulsory to own a k3 --- On Sun, 2/14/10, Vic K2VCO v...@rakefet.com wrote: From: Vic K2VCO v...@rakefet.com Subject: Re: [Elecraft] 1 kHz Filter for K3 To: elecraft@mailman.qth.net Date: Sunday, February 14, 2010, 7:56 PM On 2/14/2010 11:26 AM, Michael M. Raskin wrote: Is anyone using the 1 kHz filter in the K3 subreceiver for CW? Any pros or cons? I have one in the main rx. I got it on the grounds that I would use it in contests when running, setting the bandwidth to about 800 Hz. to catch off-frequency callers. In fact I find that 400 Hz works best, because there are usually loud stations close by! It's nice to have, but not as essential as I'd thought. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ 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