Re: [Elecraft] [K2] KAT2 Question
Hi All, To follow up on this thread for the archives...my problems are resolved. I actually had two issues: 1 - I had mis-wired J7 on both ends originally! The instructions are clear, and the proper orientation of the cable is even imprinted on the card, but I looked at the picture and interpreted the floppy-looking conductor as the ground strap ... not the center conductor. 2 - I stared hard for a while at my toroids and solder joints, and slapped my head in disgust when I noticed that one of the relays was in backwards. Fixed that, was able to complete the tuning section of the manual, works great now! On to the KSB2 module ... that's another email. Cheers Brian Handy AE7JW From: Don Wilhelm To: Brian Handy Cc: "elecraft@mailman.qth.net" Sent: Friday, February 15, 2013 12:53 AM Subject: Re: [Elecraft] [K2] KAT2 Question Brian, Are you certain you had the J7 connector backwards? The coax shield should be toward the right side panel. The results you are now getting indicate that you have something wrong with what you changed. That power reading is likely coming from the K2 RF board RF output detector rather than from the KAT2. If that is the case, the KAT2 is not being recognized - check the connector to the Control Board. An inability to achieve a null on C55 is usually an indication of a problem with T1. Check that it is wound in the same direction as shown in the manual. Check that the proper color leads are in the right holes. Look at the solder side of T1 - there should be no rings in the solder around the leads - that is an indication that the leads were not well stripped and tinned. I would suggest removing T1 and re-winding it. It MUST look just like the diagram in the manual or it will not function properly. 73, Don W3FPR On 2/14/2013 9:18 AM, Brian Handy wrote: > Hey all, > > I've been working on the KAT2 module for my K2. Mostly making progress but > stumped in the bridge null adjustment. > > I was having problems with C55, and getting silly readings on U4 Pin1, so > after staring at my board for a while, I went to the web for a while and read > about other folks' problems and figured out I had wired J7 backwards on the > control board. I fixed that, which brings us to my problem... > > I set ATU CALn in the menu, exit, hit 'TUNE' like I did before, and instead > of getting the mV reading like I was before, I just get a power reading - > e.g. "P 4.5". I can't seem to get back to what I was looking at before. > > I went back and checked the other tests again ... I have everything in ATU > mode in the menu, I can make the relays go clicky-click when I run through > that set of options in the ATU menu, but I can't get this null mode to work. > I was able to get it to work when I had the RF cable J7 wired up wrong. > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] KAT2 Question
Brian, Are you certain you had the J7 connector backwards? The coax shield should be toward the right side panel. The results you are now getting indicate that you have something wrong with what you changed. That power reading is likely coming from the K2 RF board RF output detector rather than from the KAT2. If that is the case, the KAT2 is not being recognized - check the connector to the Control Board. An inability to achieve a null on C55 is usually an indication of a problem with T1. Check that it is wound in the same direction as shown in the manual. Check that the proper color leads are in the right holes. Look at the solder side of T1 - there should be no rings in the solder around the leads - that is an indication that the leads were not well stripped and tinned. I would suggest removing T1 and re-winding it. It MUST look just like the diagram in the manual or it will not function properly. 73, Don W3FPR On 2/14/2013 9:18 AM, Brian Handy wrote: Hey all, I've been working on the KAT2 module for my K2. Mostly making progress but stumped in the bridge null adjustment. I was having problems with C55, and getting silly readings on U4 Pin1, so after staring at my board for a while, I went to the web for a while and read about other folks' problems and figured out I had wired J7 backwards on the control board. I fixed that, which brings us to my problem... I set ATU CALn in the menu, exit, hit 'TUNE' like I did before, and instead of getting the mV reading like I was before, I just get a power reading - e.g. "P 4.5". I can't seem to get back to what I was looking at before. I went back and checked the other tests again ... I have everything in ATU mode in the menu, I can make the relays go clicky-click when I run through that set of options in the ATU menu, but I can't get this null mode to work. I was able to get it to work when I had the RF cable J7 wired up wrong. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K2] KAT2 Question
Hey all, I've been working on the KAT2 module for my K2. Mostly making progress but stumped in the bridge null adjustment. I was having problems with C55, and getting silly readings on U4 Pin1, so after staring at my board for a while, I went to the web for a while and read about other folks' problems and figured out I had wired J7 backwards on the control board. I fixed that, which brings us to my problem... I set ATU CALn in the menu, exit, hit 'TUNE' like I did before, and instead of getting the mV reading like I was before, I just get a power reading - e.g. "P 4.5". I can't seem to get back to what I was looking at before. I went back and checked the other tests again ... I have everything in ATU mode in the menu, I can make the relays go clicky-click when I run through that set of options in the ATU menu, but I can't get this null mode to work. I was able to get it to work when I had the RF cable J7 wired up wrong. Ideas? Thanks, Brian Handy AE7JW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 -- KAT2 Question - Disregard
Sorry, folks, the instruction manual clearly stated "BAR graph" and when I switched to it everything worked just fine!! Elecraft - 1; WB2LQF - 0 Stan Levandowski WB2LQF HF QRP CW -- Doing more with less for over 50 years! QCWA #35038 OOTC #4558 NAQCC #4740 SKCC #6488 FISTS #14992 On Mon, Sep 27, 2010 at 6:21 PM, stan levandowski wrote: > I just finished my KAT2 for my K2 #6980. According to p. 19 of the > instructions, my KAT2 is supposed to automatically reduce power to 3 > watts if my power control is set higher during the autotune, if my > firmware revision is higher than 1.05 on the K2 Main Microcontroller. > My firmware is Revision 2.4. > > But it doesn't look like the KAT2 is reducing power during the > autotune. > > Just wondering if anyone else has experienced a similar situation. No > big deal; I can just do it myself, but thought I'd ask. > > Other than the above, the KAT2 seems to be working very, very well > especially since it was able to resolve a 12:1 SWR on a 40 meter > dipole that was resonant on 6.6 mHz. Don't ask...that's another > story. > > > > Stan Levandowski WB2LQF > HF QRP CW -- Doing more with less for over 50 years! > QCWA #35038 OOTC #4558 NAQCC #4740 SKCC #6488 FISTS #14992 > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 -- KAT2 Question
I just finished my KAT2 for my K2 #6980. According to p. 19 of the instructions, my KAT2 is supposed to automatically reduce power to 3 watts if my power control is set higher during the autotune, if my firmware revision is higher than 1.05 on the K2 Main Microcontroller. My firmware is Revision 2.4. But it doesn't look like the KAT2 is reducing power during the autotune. Just wondering if anyone else has experienced a similar situation. No big deal; I can just do it myself, but thought I'd ask. Other than the above, the KAT2 seems to be working very, very well especially since it was able to resolve a 12:1 SWR on a 40 meter dipole that was resonant on 6.6 mHz. Don't ask...that's another story. Stan Levandowski WB2LQF HF QRP CW -- Doing more with less for over 50 years! QCWA #35038 OOTC #4558 NAQCC #4740 SKCC #6488 FISTS #14992 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
