KAT500
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Good Morning
I have a KAT500 with a vertical on ANT 1 and a Hex on ANT 3. I go to 20 meters with Auto flashing an put the radio in AM and the KAT500 tunes and finds a good SWR - all is fine. Then I play around with other frequencies and then come back and for some reason the KAT500 appears to not remember the tuning parameters and then retunes again for the same frequency on the same antenna. Why is this?? This happens frequently (i.e.: not remembering the settings and going into retune). Also, the SWR meter on the K3 is always blank (i.e.: no bars) while on the K3 and KPA500 I see the SWR at 1.5?? 73s from Colombia Larry HK2LS -- Larry Snyder, RN.ORG "Thousands of Nurses Depend on www.RN.org <http://www.RN.org> for their Nursing CEUs Daily!" ______________________________________________________________ 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 Message delivered to [hidden email] |
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On 5/26/2015 5:50 AM, Larry Snyder wrote:
> I have a KAT500 with a vertical on ANT 1 and a Hex on ANT 3. > > I go to 20 meters with Auto flashing an put the radio in AM and the KAT500 > tunes and finds a good SWR - all is fine. Then I play around with other > frequencies and then come back and for some reason the KAT500 appears to not > remember the tuning parameters and then retunes again for the same frequency > on the same antenna. Why is this?? This happens frequently (i.e.: not > remembering the settings and going into retune). If the MAN or AUTO LED is flashing, the KAT500 will tune as soon as enough RF is applied [~20 W]. Not sure I follow your explanation but ... I run my KAT500 in MAN all the time and it never "forgets." I originally taught it by stepping through the segments of the bands and getting a match. I occasionally need to retune [like when it's been raining, which doesn't happen much out here in California these days], but basically it always knows. Not sure how "AM" got into this ... if I want the KAT to retune, I tap the KAT TUNE button, the MAN LED flashes and I hold XMIT on the K3. The K3 goes to tune power, the KAT tunes, and when it's done, I tap XMIT. > > Also, the SWR meter on the K3 is always blank (i.e.: no bars) while on the > K3 and KPA500 I see the SWR at 1.5?? I don't follow that. The KAT500 SWR LED's display the SWR as seen by the KPA500 [after matching] as does the KPA500 too. It's the SWR on the jumper cable from the KPA output to the KAT input. The K3 displays the SWR looking into the KPA500, an impedance that should be essentially 50+j0 ohms for a 1:1 SWR. I don't see any SWR bars on my K3 either. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Larry Snyder
Larry,
Tune each KAT500 band segment into the antenna of choice - referred to as "Training the Tuner" with the tuner in AUTO. After doing that, change the KAT500 to MAN and it will not re-tune - it will restore the settings for that antenna and frequency. I suspect you are operating with the KAT500 in AUTO mode, and that will cause tuning anomalies. OK, the 'labels' AUTO and MAN may not be what we have previously been accustomed to, but do the KAT500 'training' exercise, then switch to MAN and your problem should be resolved. 73, Don W3FPR On 5/26/2015 8:50 AM, Larry Snyder wrote: > Good Morning > > > > I have a KAT500 with a vertical on ANT 1 and a Hex on ANT 3. > > > > I go to 20 meters with Auto flashing an put the radio in AM and the KAT500 > tunes and finds a good SWR - all is fine. Then I play around with other > frequencies and then come back and for some reason the KAT500 appears to not > remember the tuning parameters and then retunes again for the same frequency > on the same antenna. Why is this?? This happens frequently (i.e.: not > remembering the settings and going into retune). > > > > Also, the SWR meter on the K3 is always blank (i.e.: no bars) while on the > K3 and KPA500 I see the SWR at 1.5?? > > > > 73s from Colombia > > Larry HK2LS > > > > -- > > Larry Snyder, RN.ORG > > "Thousands of Nurses Depend on www.RN.org <http://www.RN.org> for their > Nursing CEUs Daily!" > > > > ______________________________________________________________ > 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 > Message delivered to [hidden email] > ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Larry Snyder
Hi Larry,
I have a description of the tuning procedures that the KAT500 goes through at http://www.ke7x.com/home/kat500-and-kxpa100-tuners that you might find useful. Cheers and 73, Fred KE7X Author of: "The Elecraft K3: Design, Configuration and Operation 2nd ed" "The Elecraft KX3 - Going for the summit" "The Elecraft KPA500 and KAT500 - the K-Line Dream Station" Printed, coil bound copies of these are all available at www.elecraft.com The following are available at KE7X.com: KPA500 and KAT500 Quick Set Up Guide http://www.ke7x.com/home/k-line-introduction-and-set-up-guide KAT500 and KXPA500 Tuner Operation http://www.ke7x.com/home/kat500-and-kxpa100-tuners "The Elecraft KXPA100, PX3 and 2M/4M Transverters - Assembling the KX3-Line Station" available at www.lulu.com. -----Original Message----- From: Elecraft [mailto:[hidden email]] On Behalf Of Larry Snyder Sent: Tuesday, May 26, 2015 5:51 AM To: [hidden email] Subject: [Elecraft] KAT500 Good Morning I have a KAT500 with a vertical on ANT 1 and a Hex on ANT 3. I go to 20 meters with Auto flashing an put the radio in AM and the KAT500 tunes and finds a good SWR - all is fine. Then I play around with other frequencies and then come back and for some reason the KAT500 appears to not remember the tuning parameters and then retunes again for the same frequency on the same antenna. Why is this?? This happens frequently (i.e.: not remembering the settings and going into retune). Also, the SWR meter on the K3 is always blank (i.e.: no bars) while on the K3 and KPA500 I see the SWR at 1.5?? 73s from Colombia Larry HK2LS -- Larry Snyder, RN.ORG "Thousands of Nurses Depend on www.RN.org <http://www.RN.org> for their Nursing CEUs Daily!" ______________________________________________________________ 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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