Re: Re: [Elecraft] Two K3's, Same Band, Same Time?
Hi Tom Were you using linears as well? David G3UNA I would try it. We had two K3's in use at the Holland (MI !) field day site, K8DAA on 20 meters. One on phone the other on CW. Sometime we were within 50-75 kc's , oops, kHz of each other, with no ill effect. The antennas were maybe 200 feet apart at the most, and they were not looking into the ends of any dipole. Compare to years past, we have had all kinds of problems with receiver overload and transmitter noise. tom K8TB - Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: Re: [Elecraft] Two K3's, Same Band, Same Time?
Eric Is the phase noise performance of the K3s on Ducie the same as that from later K3s? I dimly recall that some early K3s had an issue which was later fixed. I know you had to supply their K3s quite early on in the production run, so, perhaps they are now even better. I attended their technical talks at HFC and I must say the detail was astonishing. David G3UNA From: Eric Swartz WA6HHQ - Elecraft [EMAIL PROTECTED] Date: 2008/10/29 Wed AM 04:25:46 GMT To: Craig Rairdin [EMAIL PROTECTED] CC: 'Elecraft Reflector' elecraft@mailman.qth.net Subject: Re: [Elecraft] Two K3's, Same Band, Same Time? Craig, That may have been due to the wideband noise and other products transmitted from the other, non-K3, station. The VP6DX guys ran two K3s per band at 1500w for the complete time they were down on Ducie without interference. 73, Eric WA6HHQ _..._ - Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Two K3's, Same Band, Same Time?
Hi Dan: At 23:01 10/28/2008, Dan Levin wrote: For Sweepstakes, we are thinking about using a large multi-multi contesting station to house two separate single operator efforts. The station has two yagi antennas on each band, separated by about 500 feet, and element tip to element tip when beaming the US (antennas pointed in parallel). The thought has crossed my mind that two K3's in such a situation might be able to deal with the other signal, even strong and so close, if one station is at the low end of the band (say 14005) and the other is at the high end of the band (say 14075). Would anyone care to weigh in about the likelihood of the receivers surviving such behavior? For Field Day 2008, the Mid-MO ARC ran three 100W (3) K3s. Each K3 used a multiband dipole. The three dipoles were all strung, end-to-end, with about 40' of space BETWEEN ends, in order to attempt to take as much advantage as possible of the inherent null off the end of each dipole. We very often found ourselves running at least two of the K3s on the same band and a number of times, we found all three K3's on the same band (usually one K3 on CW and the other two K3s on SSB). While I'd be lying if I said there was NO DESENSE, I can state that the level of desense was such than no operator (newbie or old hand) ever reported a problem of significant front end overload or significant dense... period! And you can bet that I'd have (eventually) heard about it if it'd been there! The K3s performed SO MUCH BETTER than ANY other rig combinations we've used over the years! And the attention to front end design built into the K3 has really caused it to shine as a top performer in the presence of nearby strong signals. We'll be running a 2-station special event activity this coming weekend: Halloween from Frankenstein (MISSOURI) and the W0O special event call. We'll have two K3's operating here as well, and we'll again be using two of the three multiband dipoles, end-to-end. We expect no significant degradation in our ability to operate both stations on the same band as in the past. While this does not address QRO operation, it may help give you an idea of what you might expect, given the proximity of the dipoles to each other. 73, Tom HammondN0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Two K3's, Same Band, Same Time?
Hi David, The low phase noise has not changed on later K3s. :-) 73, Eric WA6HHQ _..._ [EMAIL PROTECTED] wrote: Eric Is the phase noise performance of the K3s on Ducie the same as that from later K3s? I dimly recall that some early K3s had an issue which was later fixed. I know you had to supply their K3s quite early on in the production run, so, perhaps they are now even better. I attended their technical talks at HFC and I must say the detail was astonishing. David G3UNA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Two K3's, Same Band, Same Time?
I would try it. We had two K3's in use at the Holland (MI !) field day site, K8DAA on 20 meters. One on phone the other on CW. Sometime we were within 50-75 kc's , oops, kHz of each other, with no ill effect. The antennas were maybe 200 feet apart at the most, and they were not looking into the ends of any dipole. Compare to years past, we have had all kinds of problems with receiver overload and transmitter noise. tom K8TB ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Two K3's, Same Band, Same Time?
We used to do that kind of thing all the time in the old days of tube-type radios. I used to keep an old Drake B-line around just for use on Field Day. It wasn't until the advent of solid-state fully-synthesized radios that it became impossible to do phone and CW on the same band on FD. The K3 has finally brought modern technology up to the performance level we had 40 years ago. :=) Al N1AL On Tue, 2008-10-28 at 20:01, Dan Levin wrote: For Sweepstakes, we are thinking about using a large multi-multi contesting station to house two separate single operator efforts. The station has two yagi antennas on each band, separated by about 500 feet, and element tip to element tip when beaming the US (antennas pointed in parallel). The thought has crossed my mind that two K3's in such a situation might be able to deal with the other signal, even strong and so close, if one station is at the low end of the band (say 14005) and the other is at the high end of the band (say 14075). Would anyone care to weigh in about the likelihood of the receivers surviving such behavior? ***dan, K6IF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Two K3's, Same Band, Same Time?
I don't know about two K3's but I can tell you that my K3 was swamped during Field Day by the phone station operating with a beam pointed away from me, directly off the end of my dipole, separated by about that 500' distance. That was CW vs SSB frequency spacing. We were ok when operating on separate bands; just not on the same band. Craig NZ0R K3/100 #25 K2/100 #4941 K1 #1966 KX1 #1499 When you spread the wealth around, it's good for everybody. -- Barack Obama From each according to his ability, to each according to his need -- Karl Marx You can choose policies that invest in our middle-class and create new jobs and grow this economy from the bottom-up. -- Barack Obama It will be the workers, with their courage, resolution and self-sacrifice, who will be chiefly responsible for achieving victory. -- Karl Marx -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dan Levin Sent: Tuesday, October 28, 2008 11:02 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Two K3's, Same Band, Same Time? For Sweepstakes, we are thinking about using a large multi-multi contesting station to house two separate single operator efforts. The station has two yagi antennas on each band, separated by about 500 feet, and element tip to element tip when beaming the US (antennas pointed in parallel). The thought has crossed my mind that two K3's in such a situation might be able to deal with the other signal, even strong and so close, if one station is at the low end of the band (say 14005) and the other is at the high end of the band (say 14075). Would anyone care to weigh in about the likelihood of the receivers surviving such behavior? ***dan, K6IF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Two K3's, Same Band, Same Time?
Craig, That may have been due to the wideband noise and other products transmitted from the other, non-K3, station. The VP6DX guys ran two K3s per band at 1500w for the complete time they were down on Ducie without interference. 73, Eric WA6HHQ _..._ Craig Rairdin wrote: I don't know about two K3's but I can tell you that my K3 was swamped during Field Day by the phone station operating with a beam pointed away from me, directly off the end of my dipole, separated by about that 500' distance. That was CW vs SSB frequency spacing. We were ok when operating on separate bands; just not on the same band. Craig NZ0R K3/100 #25 K2/100 #4941 K1 #1966 KX1 #1499 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Two K3's, Same Band, Same Time?
Dan, you should be fine. On Field Day W7OTV had two K3s, one on CW and one on digital. Antennas fairly non-directional, about 500 ft apart. A CW op was tuning up the band and crossed into digital territory, and didn't even notice the other K3 until he was almost right on top of him. It was a world of difference from previous years when my trusty old ICOM 735 and a variety of lower-end Yaesu and Kenwood rigs would really clobber each other from one end of the band to the other. Good luck, Carl WS7L K3 #486 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dan Levin Sent: Tuesday, October 28, 2008 9:02 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Two K3's, Same Band, Same Time? For Sweepstakes, we are thinking about using a large multi-multi contesting station to house two separate single operator efforts. The station has two yagi antennas on each band, separated by about 500 feet, and element tip to element tip when beaming the US (antennas pointed in parallel). The thought has crossed my mind that two K3's in such a situation might be able to deal with the other signal, even strong and so close, if one station is at the low end of the band (say 14005) and the other is at the high end of the band (say 14075). Would anyone care to weigh in about the likelihood of the receivers surviving such behavior? ***dan, K6IF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.8.4/1752 - Release Date: 10/28/2008 10:04 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
