K3 6M problem
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Jamie,
In your note on the 6M problem you didn't indicate if you tried the K3 in the ATU 'BYPASS' position. I had the problem of a high SWR on 6 Meters when the ATU tried to find a match on my 6M yagi with a known relatively good 1.2:1 SWR. In the BYPASS mode the SWR looked fine. Using the ATU produced a much higher SWR on 50 MHz. If your K3 internal SWR display indicates a good SWR in the BYPASS mode, but the ATU cannot find a good match, there is a fix. I received a BETA firmware update along with suggested parameter changes of some of the hidden MENU settings (need to turn TECH MD on) which addressed the 6M ATU problem. The ATU in my K3 now performs as it should on 6 Meters. Local friend K2PI also had the same problem which was resolved with the BETA firmware update. If your 6M SWR is good in the ATU BYPASS mode, drop Elecraft tech support a note. 73, Rich - K1HTV = = = -----Original Message----- From: James C. Hall, MD [mailto:[hidden email]] Sent: Friday, July 01, 2011 12:06 PM To: [hidden email] Subject: [Elecraft] K3 6M problem Hello: After returning my K3 back to the shack after Field Day, I have discovered that 6M no longer transmits with low SWR. I checked all the rear panel connections as it is interfaced through a microham MK2R+ and Stationmaster band decoder. However, I have the 6M antenna coax directly going to Antenna 2 on the radio. Using an antenna analyzer, the antenna shows excellent SWR. Using a dummy load to each antenna port, all bands shows good SWR except 6M. I updated the firmware and cycled the power but I still have the HI SWR showing with 6M. I do have the PR6 pre-amp in line, but the problem is not receive. I'm stumped. Any help appreciated. 73, Jamie WB4YDL -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ______________________________________________________________ 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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Hi Rich:
Yes, my problem is that I have terrible SWR when the ATU is in BYPASS and the antenna is a known resonant load. I also tried to tune into a DL and DID get a 1:1 SWR, but when returning to the antenna with the ATU in BYPASS, the SWR was around 8:1. I'll be opening up the K3 to inspect the L10/C10 area on KAT3. That appears to be the problem area. Gary has sent me an email stating they now have different parts for that area. Thanks again. 73, Jamie WB4YDL -----Original Message----- From: Rich - K1HTV [mailto:[hidden email]] Sent: Saturday, July 02, 2011 7:00 AM To: 'James C. Hall, MD'; [hidden email] Subject: RE: [Elecraft] K3 6M problem Jamie, In your note on the 6M problem you didn't indicate if you tried the K3 in the ATU 'BYPASS' position. I had the problem of a high SWR on 6 Meters when the ATU tried to find a match on my 6M yagi with a known relatively good 1.2:1 SWR. In the BYPASS mode the SWR looked fine. Using the ATU produced a much higher SWR on 50 MHz. If your K3 internal SWR display indicates a good SWR in the BYPASS mode, but the ATU cannot find a good match, there is a fix. I received a BETA firmware update along with suggested parameter changes of some of the hidden MENU settings (need to turn TECH MD on) which addressed the 6M ATU problem. The ATU in my K3 now performs as it should on 6 Meters. Local friend K2PI also had the same problem which was resolved with the BETA firmware update. If your 6M SWR is good in the ATU BYPASS mode, drop Elecraft tech support a note. 73, Rich - K1HTV = = = -----Original Message----- From: James C. Hall, MD [mailto:[hidden email]] Sent: Friday, July 01, 2011 12:06 PM To: [hidden email] Subject: [Elecraft] K3 6M problem Hello: After returning my K3 back to the shack after Field Day, I have discovered that 6M no longer transmits with low SWR. I checked all the rear panel connections as it is interfaced through a microham MK2R+ and Stationmaster band decoder. However, I have the 6M antenna coax directly going to Antenna 2 on the radio. Using an antenna analyzer, the antenna shows excellent SWR. Using a dummy load to each antenna port, all bands shows good SWR except 6M. I updated the firmware and cycled the power but I still have the HI SWR showing with 6M. I do have the PR6 pre-amp in line, but the problem is not receive. I'm stumped. Any help appreciated. 73, Jamie WB4YDL -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ______________________________________________________________ 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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Hello James,
Could you please let me know when you bought your KAT3? I bought mine in Oct 2010 and don't know whether the modification in L10/C10 areas was done. TNX & 73, Johnny VR2XMC 從︰ "James C. Hall, MD" <[hidden email]> 收件人︰ 'Rich - K1HTV' <[hidden email]>; [hidden email] 傳送日期︰ 2011年07月2日 (週六) 10:27 PM 主題︰ Re: [Elecraft] K3 6M problem Hi Rich: Yes, my problem is that I have terrible SWR when the ATU is in BYPASS and the antenna is a known resonant load. I also tried to tune into a DL and DID get a 1:1 SWR, but when returning to the antenna with the ATU in BYPASS, the SWR was around 8:1. I'll be opening up the K3 to inspect the L10/C10 area on KAT3. That appears to be the problem area. Gary has sent me an email stating they now have different parts for that area. Thanks again. 73, Jamie WB4YDL -----Original Message----- From: Rich - K1HTV [mailto:[hidden email]] Sent: Saturday, July 02, 2011 7:00 AM To: 'James C. Hall, MD'; [hidden email] Subject: RE: [Elecraft] K3 6M problem Jamie, In your note on the 6M problem you didn't indicate if you tried the K3 in the ATU 'BYPASS' position. I had the problem of a high SWR on 6 Meters when the ATU tried to find a match on my 6M yagi with a known relatively good 1.2:1 SWR. In the BYPASS mode the SWR looked fine. Using the ATU produced a much higher SWR on 50 MHz. If your K3 internal SWR display indicates a good SWR in the BYPASS mode, but the ATU cannot find a good match, there is a fix. I received a BETA firmware update along with suggested parameter changes of some of the hidden MENU settings (need to turn TECH MD on) which addressed the 6M ATU problem. The ATU in my K3 now performs as it should on 6 Meters. Local friend K2PI also had the same problem which was resolved with the BETA firmware update. If your 6M SWR is good in the ATU BYPASS mode, drop Elecraft tech support a note. 73, Rich - K1HTV ______________________________________________________________ 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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In reply to this post by AC7AC
I learn a ton from this list Ron and have been on it for, let's see, 12
years could it be? I know of one HAM in the Upper Peninsula of MI who searched me on the list and then called me to discuss how to operate some of the functions. The list continues to provide me with quite an education and at times allows me to donate a little of my learning. 73, Bill K9YEQ -----Original Message----- I've been following this list for a decade now. One of the most popular uses of this list has been to bring general troubleshooting and repair questions here or just to explore why something happens. There are still a lot of solder jockeys here[WRJ] ......[WRJ] and I am one of them who love to build"....." who remain a key part of that legacy [WRJ] .... 73, Ron AC7AC -----Original Message----- I simply cannot understand why folks post to a general list rather than going to Elecraft in the first place? Seems like a good way to waste a lot of time and energy unnecessarily IMHO. 73, Bill ______________________________________________________________ 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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