Is there a an external signal on the K3 for ANT1/ANT2
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Questions:
I may be looking for something that's right under my nose, but I've been digging and can't find it... ***>>> Is there a way in the various outputs to tell whether the radio is transmitting on ANT1 or ANT2. This is an need that is developing out of my very successful use of diversity on 40 through 15 during the IOTA contest out on North Carolina's Core Banks. I am in the process of adding switching to listen in diversity on two transmitting antennas on 40-10, in addition to the more common diversity on two different receive antennas on 80 and 160. During IOTA, the ANT switch put the transmitting antenna of a right angle pair of identical antennas in the left ear, and it was a very easy concept to manage, which others in the group picked up instantly. At home and facing dissimilar antennas and amplifiers I would need the ANT1/ANT2 state exported to throw switches. ***>>> A second question regards where one might place a BNC jack that has the "other" ant RX out jack brought out to the back panel instead of routed directly to the KRX3. Is there a newer back panel that would support this? Explanation: If one is using diversity for 160 through 10 and has to switch between diverse RX antennas on low bands to listening diversely on TX antennas, the switching choice that now is made at kit build time will have to be made and then unmade as band changes progress during the contest. I know, I know, what planet have you been on, but it WORKED very nicely on Core Banks, particularly on 40 meters. I'm sure many of you have heard that very fast QSB later in the evening on 40 meters that can clip dits out characters and change dahs into dits. After listening to it all night in the IOTA I am 99% positive that it is caused by rotating polarization, and the drop is when the rotation invokes that 30 dB cross-polarization at 90 degrees off the SINGLE antenna polarization in use at the station. The rotation was commonly around 10-20 seconds but varied wildly and was NOT at the same frequency or angle of rotation on different incoming signals. Simply toggling out of and into diversity mode would respectively toggle between: 1) aforementioned deep QSB, particularly bad on weaker signals with low antennas, and all weak signals in the pileup coming from the center of the headset. and 2) hearing the same signal rotate from one ear to another, most of the time without much of a dip, if the audio in BOTH ears is used for evaluation. The rotation effect for weak signals calling in a pileup (we were a rare mult), would frequently spread out calling signals left to right in the headset. Different weak signals were not uniform in their cycle phase or timing. It was notable that this effect was missing from LOUD signals from either EU or US, which tended to be in ONE EAR OR THE OTHER, not both. USA in the SW-NE wire and EU in the SE-NW wire. On high angle signals on 20 and 40 the separation would be not so much direction incoming as polarization in reception. The antenna was an identical pair of 28' on a side inverted vee doublets supported in the center on a 40' push up pole, carefully pulled out at right angles and fed with two 450 lines to a pair of 4:1 voltage baluns right at the K3, and using the internal tuner. The obvious mismatch to the KRX3 was worried about but did not seem to affect reception in any discernable way. Also the misc power in the not-transmitting antenna while the other was transmitting never once operated the COR. We had taken pains toward this in the erection of the antenna. I doubt the low levels would have been true if we had been operating amps instead of barefoot. 73, Guy ______________________________________________________________ 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 |
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I need a voltage or not to drive switching circuits external to the K3
when using this with amplifiers. It is not a matter of the operator knowing which one is being used. That, as you say, is adequately shown. On Sat, Aug 21, 2010 at 1:52 PM, ussv dharma <[hidden email]> wrote: > the screen shows ant1 or ant2 as to which antenna is being used > > > If you don't change direction you WILL arrive exactly where you're headed!! Susan Meckley, Skipper W7KFI-mm AFA9SM USSV DHARMA > > > --- On Sat, 8/21/10, Guy Olinger K2AV <[hidden email]> wrote: > >> From: Guy Olinger K2AV <[hidden email]> >> Subject: [Elecraft] Is there a an external signal on the K3 for ANT1/ANT2 >> To: "Elecraft Reflector" <[hidden email]> >> Date: Saturday, August 21, 2010, 7:47 AM >> Questions: >> >> I may be looking for something that's right under my nose, >> but I've >> been digging and can't find it... >> >> ***>>> Is there a way in the various outputs to >> tell whether the radio >> is transmitting on ANT1 or ANT2. This is an need that >> is developing >> out of my very successful use of diversity on 40 through 15 >> during the >> IOTA contest out on North Carolina's Core Banks. I am >> in the process >> of adding switching to listen in diversity on two >> transmitting >> antennas on 40-10, in addition to the more common diversity >> on two >> different receive antennas on 80 and 160. >> >> During IOTA, the ANT switch put the transmitting antenna of >> a right >> angle pair of identical antennas in the left ear, and it >> was a very >> easy concept to manage, which others in the group picked up >> instantly. >> >> At home and facing dissimilar antennas and amplifiers I >> would need the >> ANT1/ANT2 state exported to throw switches. >> >> ***>>> A second question regards where one might >> place a BNC jack that >> has the "other" ant RX out jack brought out to the back >> panel instead >> of routed directly to the KRX3. Is there a newer back >> panel that >> would support this? >> >> Explanation: >> >> If one is using diversity for 160 through 10 and has to >> switch between >> diverse RX antennas on low bands to listening diversely on >> TX >> antennas, the switching choice that now is made at kit >> build time will >> have to be made and then unmade as band changes progress >> during the >> contest. >> >> I know, I know, what planet have you been on, but it WORKED >> very >> nicely on Core Banks, particularly on 40 meters. >> >> I'm sure many of you have heard that very fast QSB later in >> the >> evening on 40 meters that can clip dits out characters and >> change dahs >> into dits. After listening to it all night in the >> IOTA I am 99% >> positive that it is caused by rotating polarization, and >> the drop is >> when the rotation invokes that 30 dB cross-polarization at >> 90 degrees >> off the SINGLE antenna polarization in use at the station. >> The >> rotation was commonly around 10-20 seconds but varied >> wildly and was >> NOT at the same frequency or angle of rotation on different >> incoming >> signals. >> >> Simply toggling out of and into diversity mode would >> respectively >> toggle between: >> >> 1) aforementioned deep QSB, particularly bad on weaker >> signals with >> low antennas, and all weak signals in the pileup coming >> from the >> center of the headset. >> >> and >> >> 2) hearing the same signal rotate from one ear to another, >> most of the >> time without much of a dip, if the audio in BOTH ears is >> used for >> evaluation. The rotation effect for weak signals >> calling in a pileup >> (we were a rare mult), would frequently spread out calling >> signals >> left to right in the headset. Different weak signals were >> not uniform >> in their cycle phase or timing. It was notable that >> this effect was >> missing from LOUD signals from either EU or US, which >> tended to be in >> ONE EAR OR THE OTHER, not both. USA in the SW-NE wire and >> EU in the >> SE-NW wire. >> >> On high angle signals on 20 and 40 the separation would be >> not so much >> direction incoming as polarization in reception. >> >> The antenna was an identical pair of 28' on a side inverted >> vee >> doublets supported in the center on a 40' push up pole, >> carefully >> pulled out at right angles and fed with two 450 lines to a >> pair of 4:1 >> voltage baluns right at the K3, and using the internal >> tuner. The >> obvious mismatch to the KRX3 was worried about but did not >> seem to >> affect reception in any discernable way. Also the >> misc power in the >> not-transmitting antenna while the other was transmitting >> never once >> operated the COR. We had taken pains toward this in >> the erection of >> the antenna. I doubt the low levels would have been >> true if we had >> been operating amps instead of barefoot. >> >> 73, Guy >> ______________________________________________________________ >> 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: Is there a an external signal on the K3 for ANT1/ANT2
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In reply to this post by Guy, K2AV
Guy,
You can use a computer to poll for antenna select status using the "AN;" command. This will tell you which TX antenna is in use. If you don't have a computer in the system, you can use the "DIGOUT1" menu entry to obtain an antenna 1/2 indication on the DIGOUT1 pin of the ACC connector. DIGOUT1 is configured in the menu, and is per-band/ per-antenna. For example, on each band you could set it to OFF (floating) for ANT1 and ON (0V) for ANT2. 73, Wayne N6KR Guy Olinger K2AV wrote: > Questions: > > I may be looking for something that's right under my nose, but I've > been digging and can't find it... > > ***>>> Is there a way in the various outputs to tell whether the radio > is transmitting on ANT1 or ANT2. ______________________________________________________________ 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 |
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Thank you. I thought something was in there someplace. It will be
harder to get this into a computer program and the computer program is easier to mess up. The menu entry will be available for anyone's K3 that is in use. Splendid. How about getting Opposite ANTx RX OUT to the back panel? 73, Guy. On Sat, Aug 21, 2010 at 2:02 PM, Wayne Burdick <[hidden email]> wrote: > Guy, > > You can use a computer to poll for antenna select status using the "AN;" > command. This will tell you which TX antenna is in use. > > If you don't have a computer in the system, you can use the "DIGOUT1" menu > entry to obtain an antenna 1/2 indication on the DIGOUT1 pin of the ACC > connector. DIGOUT1 is configured in the menu, and is per-band/per-antenna. > For example, on each band you could set it to OFF (floating) for ANT1 and ON > (0V) for ANT2. > > 73, > Wayne > N6KR > > > Guy Olinger K2AV wrote: > >> Questions: >> >> I may be looking for something that's right under my nose, but I've >> been digging and can't find it... >> >> ***>>> Is there a way in the various outputs to tell whether the radio >> is transmitting on ANT1 or ANT2. > 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 |
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