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 <[email protected]> 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 <[email protected]> wrote: > >> From: Guy Olinger K2AV <[email protected]> >> Subject: [Elecraft] Is there a an external signal on the K3 for ANT1/ANT2 >> To: "Elecraft Reflector" <[email protected]> >> 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:[email protected] >> >> 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
