Settings for CW filter 400hz
Locked
 
|
Howdy K3' people:
I need help setting the parameters if my 8-pole 400hz filter. Recently a friend explained the advantage of using a narrow filter on the mode JT9-1. He has a Flex5000. I have a K3. So I tried today to get a waterfall display with the 400hz filter and despite turning up soundcard and all, I could not. Yesterday I was able to fiddle with Width/shift and CUT/Lo/Hi and actually get s,ethg to get me down to 1khz. But I hadn't selected XFIL anything at that moment. I have 8-pole 2.8 , 4kHz , and FM filter . I need some guidelines on how to select the cw filter while listening to the JT9-1, very-narrow, signal then I can buy the 8-pole 250hz CW filter for both the Sub-Rx and Main. thanks -- 73 KD7YZ Bob ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
If anyone is using a very narrow filter for JT9 please tell us how it works
for you in that mode. I think more than a few of us are exploring this new mode Joe has brought out. Fred/N0AZZ -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of KD7YZ Bob Sent: Wednesday, December 05, 2012 12:57 PM To: K3 List Subject: [Elecraft] Settings for CW filter 400hz Howdy K3' people: I need help setting the parameters if my 8-pole 400hz filter. Recently a friend explained the advantage of using a narrow filter on the mode JT9-1. He has a Flex5000. I have a K3. So I tried today to get a waterfall display with the 400hz filter and despite turning up soundcard and all, I could not. Yesterday I was able to fiddle with Width/shift and CUT/Lo/Hi and actually get s,ethg to get me down to 1khz. But I hadn't selected XFIL anything at that moment. I have 8-pole 2.8 , 4kHz , and FM filter . I need some guidelines on how to select the cw filter while listening to the JT9-1, very-narrow, signal then I can buy the 8-pole 250hz CW filter for both the Sub-Rx and Main. thanks -- 73 KD7YZ Bob ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
On Wednesday Smith used a Straight-Key to send: -------------Original Comment------- > If anyone is using a very narrow filter for JT9 please tell us how it works > for you in that mode. I think more than a few of us are exploring this new > mode Joe has brought out. I used it on about 15 contacts yesterday, 20m .. What I "saw" on the readings were every Report which was generated was >= +30 . What I "heard" was that all the adjacent QRM crud was non-existent. In fact, using "Shift" I could eliminate one of you guys 20hz away in a legitimate QSO and still decode and get the +30 reports. So I posited a question to the academics which revolved about the notion I had that "If" the sig-rep is really +30, here, in the mind of the JT9-Genie inside my Win7 machine, then that should mean that I could also hear down to the typical level of -25 and decode. So, my non-Professor of Radio Astronomy brain decided that a guy running 5 watts from France, who was getting +30 from me, should be able to reduce power 20 db, and I should be able to decode him .. well, or her, but I dunno any French Amateur Radio girls ennaweh, so "guys" stands. However. it's a real Juggle for me, the Newbie-K3 driver, to try and balance all the 4 to 6 setting possibilities and wind up with a visible trace. I won't believe this is actually making weaker signals possible until I have somebody systematically reduce the output power on his end of the planet while i write down the sig-reps. 'Doubting Thomas' you say? Ey-yup, true. -- Best regards, Bob KD7YZ Win7-64bit + K3 BTW I wish they wouldn't make the List-Emails auto-reply to original person only .. seems a lot of useful info in the answers will never get to the general populace. I only caught the reply-to address at the last second B4 Sending .. way too much trouble to re-address these. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Bob
WSJT-9 was devolved to be used for 30m and down, low bands only and best on 80/160m was never meant for the higher bands like20m. Fred/N0AZZ -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of KD7YZ Bob Sent: Wednesday, December 05, 2012 1:59 PM To: K3 List Subject: Re: [Elecraft] Settings for CW filter 400hz On Wednesday Smith used a Straight-Key to send: -------------Original Comment------- > If anyone is using a very narrow filter for JT9 please tell us how it > works for you in that mode. I think more than a few of us are > exploring this new mode Joe has brought out. I used it on about 15 contacts yesterday, 20m .. What I "saw" on the readings were every Report which was generated was >= +30 . What I "heard" was that all the adjacent QRM crud was non-existent. In fact, using "Shift" I could eliminate one of you guys 20hz away in a legitimate QSO and still decode and get the +30 reports. So I posited a question to the academics which revolved about the notion I had that "If" the sig-rep is really +30, here, in the mind of the JT9-Genie inside my Win7 machine, then that should mean that I could also hear down to the typical level of -25 and decode. So, my non-Professor of Radio Astronomy brain decided that a guy running 5 watts from France, who was getting +30 from me, should be able to reduce power 20 db, and I should be able to decode him .. well, or her, but I dunno any French Amateur Radio girls ennaweh, so "guys" stands. However. it's a real Juggle for me, the Newbie-K3 driver, to try and balance all the 4 to 6 setting possibilities and wind up with a visible trace. I won't believe this is actually making weaker signals possible until I have somebody systematically reduce the output power on his end of the planet while i write down the sig-reps. 'Doubting Thomas' you say? Ey-yup, true. -- Best regards, Bob KD7YZ Win7-64bit + K3 BTW I wish they wouldn't make the List-Emails auto-reply to original person only .. seems a lot of useful info in the answers will never get to the general populace. I only caught the reply-to address at the last second B4 Sending .. way too much trouble to re-address these. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2634/5437 - Release Date: 12/04/12 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
On Wednesday Smith used a Straight-Key to send: -------------Original Comment------- > Bob > WSJT-9 was devolved to be used for 30m and down, low bands only and best on > 80/160m was never meant for the higher bands like20m. That is likely the original intent when JT was developing JT9. Once it got in the wild and many of us tried "this and that", it has proven far better than JT65a at DXing weak signal conditions from 160m to 6m. And I for one have used it in the aforementioned bands. It's also been used very nicely on EME. Yesterday's testing by me revealed that when I had a station reduce power, and he went eventually from +30db to -9db, I got sync=2 and 3 but no decode. Thus my original question about 'Could this mean we can hear a weaker signal because we use a 400Hz filter', results in a "No" answer empirically. So far. But I am so new to the K3 that I am not going to categorically say that is fact. -- Best regards, Bob KD7YZ Win7-64bit + K3 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Had you been using JT65HF or 65A?
73, Fred/N0AZZ -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of KD7YZ Bob Sent: Thursday, December 06, 2012 7:48 AM To: K3 List Subject: Re: [Elecraft] Settings for CW filter 400hz On Wednesday Smith used a Straight-Key to send: -------------Original Comment------- > Bob > WSJT-9 was devolved to be used for 30m and down, low bands only and > best on 80/160m was never meant for the higher bands like20m. That is likely the original intent when JT was developing JT9. Once it got in the wild and many of us tried "this and that", it has proven far better than JT65a at DXing weak signal conditions from 160m to 6m. And I for one have used it in the aforementioned bands. It's also been used very nicely on EME. Yesterday's testing by me revealed that when I had a station reduce power, and he went eventually from +30db to -9db, I got sync=2 and 3 but no decode. Thus my original question about 'Could this mean we can hear a weaker signal because we use a 400Hz filter', results in a "No" answer empirically. So far. But I am so new to the K3 that I am not going to categorically say that is fact. -- Best regards, Bob KD7YZ Win7-64bit + K3 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by Bob KD7YZ
Operating my K3 on 6 meters with the KPA500 ( S/N 1009 ) is new ground for me.
The amp has been performing on lower HF frequencies with expected results, but on 50 MHz the power output into a dummy load is questionable. If I try to tune with CW carrier (XMIT putton) , I can only get about 200-250 watts before the amp "faults" and shows PA DISS. The HV is about 60 volts and current 14 amps with 24 watts drive for 250 watt ouput level before "fault". If I key CW dots or dashes, then I can increase the drive to 40 watts for 450 watts output into dummy load with 1:1 SWR. HV unkeyed is 75VDC, operating on 120 VAC. (Don't remember where the transformer tap is) Specs seem to indicate the RF output should not degrade on 50 MHz and is rated for 500 watts PEP CW / SSB / DATA. Can I assume I should be able to get 500 watts RTTY carrier for 15 seconds ? I get a "fault" within half a second if driving it for power out levels higher than 250 watts. My TEMP has never gone above 60 C. Am I doing something wrong? Do I have a hardware failure? What should I expect to be normal operation on 6 meters? Pete W4WWQ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Hi Pete,
It sounds like a hardware problem in the low pass filter module. Contact Elecraft customer support. 73, Bob, N6CM On Tue, Dec 11, 2012 at 10:11 AM, Pete Lascell <[hidden email]> wrote: > Operating my K3 on 6 meters with the KPA500 ( S/N 1009 ) is new ground for > me. > > The amp has been performing on lower HF frequencies with expected results, > but on 50 MHz the power output into a dummy load is questionable. If I try > to tune with CW carrier (XMIT putton) , I can only get about 200-250 watts > before the amp "faults" and shows PA DISS. The HV is about 60 volts and > current 14 amps with 24 watts drive for 250 watt ouput level before "fault". > > If I key CW dots or dashes, then I can increase the drive to 40 watts for > 450 watts output into dummy load with 1:1 SWR. > > HV unkeyed is 75VDC, operating on 120 VAC. (Don't remember where the > transformer tap is) > > Specs seem to indicate the RF output should not degrade on 50 MHz and is > rated for 500 watts PEP CW / SSB / DATA. Can I assume I should be able to > get 500 watts RTTY carrier for 15 seconds ? I get a "fault" within half a > second if driving it for power out levels higher than 250 watts. My TEMP > has never gone above 60 C. > > Am I doing something wrong? > > Do I have a hardware failure? > > What should I expect to be normal operation on 6 meters? > > > Pete W4WWQ > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by Pete Lascell
Are you sure your SWR on your dummy load is low at 50 MHz?
Willis 'Cookie' Cooke K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart ________________________________ From: Pete Lascell <[hidden email]> To: K3 List <[hidden email]> Sent: Tuesday, December 11, 2012 12:11 PM Subject: [Elecraft] KPA500 output on 6 meters Operating my K3 on 6 meters with the KPA500 ( S/N 1009 ) is new ground for me. The amp has been performing on lower HF frequencies with expected results, but on 50 MHz the power output into a dummy load is questionable. If I try to tune with CW carrier (XMIT putton) , I can only get about 200-250 watts before the amp "faults" and shows PA DISS. The HV is about 60 volts and current 14 amps with 24 watts drive for 250 watt ouput level before "fault". If I key CW dots or dashes, then I can increase the drive to 40 watts for 450 watts output into dummy load with 1:1 SWR. HV unkeyed is 75VDC, operating on 120 VAC. (Don't remember where the transformer tap is) Specs seem to indicate the RF output should not degrade on 50 MHz and is rated for 500 watts PEP CW / SSB / DATA. Can I assume I should be able to get 500 watts RTTY carrier for 15 seconds ? I get a "fault" within half a second if driving it for power out levels higher than 250 watts. My TEMP has never gone above 60 C. Am I doing something wrong? Do I have a hardware failure? What should I expect to be normal operation on 6 meters? Pete W4WWQ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: KPA500 output on 6 meters
|
|
In reply to this post by Pete Lascell
I do a lot of meteor scatter on 6 meters, where there is 30 seconds on and 30 seconds off. I've never had a problem with my KPA500 using that mode, although to be safe I do turn up the fans to number 5 (probably don't need to but makes me feel better), and I monitor the temperature.
I do get a little more than 500 watts output on the other bands, but on 6 meters it is exactly 500 watts on my Bird. 73 de Sebastian, W4AS On Dec 11, 2012, at 1:11 PM, Pete Lascell <[hidden email]> wrote: > Operating my K3 on 6 meters with the KPA500 ( S/N 1009 ) is new ground for me. > > Specs seem to indicate the RF output should not degrade on 50 MHz and is rated for 500 watts PEP CW / SSB / DATA. Can I assume I should be able to get 500 watts RTTY carrier for 15 seconds ? I get a "fault" within half a second if driving it for power out levels higher than 250 watts. My TEMP has never gone above 60 C. > > What should I expect to be normal operation on 6 meters? > > > Pete W4WWQ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |