Re: [Elecraft] K2 issue or is it?
Barry, That can happen if you ran CAL PLL with the bottom cover off. Try it again. 73, Don W3FPR On 9/15/2020 8:38 PM, barry halterman wrote: Greetings folks. My K2 has a snapping sound when tuning the band regardless of mode and it seems to happen when I am close to a signal...within 4 khz or so. The snapping sound can be very strong sending the s meter soaring. Not only does the s meter go soaring, so do my ears! At this point I am not sure if this is more or less the nature of the beast __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 issue or is it?
Barry, can you provide more detail about the K2 settings when you hear the snapping sounds? For example, does this effect occur only in CW mode, or in USB and LSB modes as well? For which filter settings does it occur (both CW and SSB filter settings)? Is your AGC turned ON or OFF? Does the snapping subside if the RF (actually IF) gain is backed off? Does the snapping subside if the AF gain is backed off? Does this phenomenon occur on all bands or just a few bands? Don, W3FPR, will likely have a few possible causes immediately in mind after repairing hundreds of K2 radios over the years! 73, Mike, K8CN -- Sent from: http://elecraft.365791.n2.nabble.com/ __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K2 issue or is it?
Greetings folks. My K2 has a snapping sound when tuning the band regardless of mode and it seems to happen when I am close to a signal...within 4 khz or so. The snapping sound can be very strong sending the s meter soaring. Not only does the s meter go soaring, so do my ears! At this point I am not sure if this is more or less the nature of the beast Don't remember reading anything in the reviews about this oddity. Barry K3Bo __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 - Issue after installing K60XV
Well .. I checked the D19 setting, and it was set to 'Y', did the 40/80 alignment went OK, then to verify, did the complete VCO voltage checks as listed in the K2 manual on p64. All were fine. So far so good. Continued on with the 40/60 alignment tuning as listed in the K60XV instructions, and could not get the power showing under TUNE higher than 0.1. OK .. figured lets bypass the K60XV, so I unplugged the board, found the 4.7 pF capacitor and inserted in pins 1 & 3 of J15, added a jumper between pins 3 & 5 on J13. Left D19 as set per the K60XV troubleshooting instructions on page 60. Then tried to check the 40 meter power. Same results. So I put everything back together. Removed the capacitor & jumpter, reinstalled the K60XV, put the KPA100 back on, and went back to the shack. Figured I had better hook everything up (K2 & KAT100) and make sure the other bands can tune. Powered it up, and it was sitting on 40m. Said what the heck, and pushed TUNE .. 2.0 watts showed up on the LCD display ... THUD. Could it have been as simple as not properly aligning the pins of P1 and J13 ??? Even P2 and J15?? The board was recognized when I initially installed it, so I'm at a loss, but happy to see 40 & 60 working. Thanks for all the advice. 73, Neil Z, KN3ILZ On 5/22/2018 12:30 PM, Don Wilhelm wrote: Neil, Did you set the secondary menu D19 parameter to "Y"? If you have the KAT2 installed, be certain the change KAT2 R6 to 470 ohms, there is a resistor provided in the K60XV kit for that. 73, Don W3FPR On 5/20/2018 11:27 PM, Neil Zampella wrote: Hi all .. has anyone seen this type of issue with their K2. Before installing the K60XV, I had no problems seeing 10 w on 40 meters. After installing the K60XV, I can't get above 1 watt on 40 meters OR 60 meters. Did I screw something up, or is there some menu setting I missed when I did the installation? __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 - Issue after installing K60XV
Neil, Did you set the secondary menu D19 parameter to "Y"? If you have the KAT2 installed, be certain the change KAT2 R6 to 470 ohms, there is a resistor provided in the K60XV kit for that. 73, Don W3FPR On 5/20/2018 11:27 PM, Neil Zampella wrote: Hi all .. has anyone seen this type of issue with their K2. Before installing the K60XV, I had no problems seeing 10 w on 40 meters. After installing the K60XV, I can't get above 1 watt on 40 meters OR 60 meters. Did I screw something up, or is there some menu setting I missed when I did the installation? __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 - Issue after installing K60XV
possible long shot check status of D19 Alignment and Test cheers -- Sent from: http://elecraft.365791.n2.nabble.com/ __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 - Issue after installing K60XV
You didn't forget to do the 40/60 Meter Alignment on page 14 of the manual did you? Mike, KI0HA On 5/20/2018 22:27, Neil Zampella wrote: Hi all .. has anyone seen this type of issue with their K2. Before installing the K60XV, I had no problems seeing 10 w on 40 meters. After installing the K60XV, I can't get above 1 watt on 40 meters OR 60 meters. Did I screw something up, or is there some menu setting I missed when I did the installation? 73s, Neil, KN3ILZ __ 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 Message delivered to mtebe...@mchsi.com __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K2 - Issue after installing K60XV
Hi all .. has anyone seen this type of issue with their K2. Before installing the K60XV, I had no problems seeing 10 w on 40 meters. After installing the K60XV, I can't get above 1 watt on 40 meters OR 60 meters. Did I screw something up, or is there some menu setting I missed when I did the installation? 73s, Neil, KN3ILZ __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] [K2] Issue with KAT2 connector
This post is for K2 builders that have the internal KAT2 ATU. I am completing a K2 build that will include the KAT2. The 2-pin connector (P6) on the K2 RF Board connects to the RF input on the KAT2. There is a clearance problem where inductor L20 overlaps the footprint of P6 on the RF board. This overlap is about 2 mm in my case. The recommended solution to this overlap is to simply unsolder L20 and roll it forward to eliminate this overlap. I am uncomfortable with this and am thinking about using an alternative method to make this connection. I'm interested in hearing from other K2 builders who may have used an alternative to P6 because of this interference issue. 73 Dave, K8AX __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K2] Issue with KAT2 connector
Dave, If you use a non-standard method of connection, that provides difficulty if you ever have it serviced. I routinely swap out full options when doing troubleshooting (substitution is the quickest way to isolate a problem). If you use a non-standard connector, that cannot be done. That 2mm will not cause a problem at all. L20 will likely move toward the rear a bit if you bend over C202 and give it a slight push. 73, Don W3FPR On 11/13/2015 5:43 PM, David Brown wrote: This post is for K2 builders that have the internal KAT2 ATU. I am completing a K2 build that will include the KAT2. The 2-pin connector (P6) on the K2 RF Board connects to the RF input on the KAT2. There is a clearance problem where inductor L20 overlaps the footprint of P6 on the RF board. This overlap is about 2 mm in my case. The recommended solution to this overlap is to simply unsolder L20 and roll it forward to eliminate this overlap. I am uncomfortable with this and am thinking about using an alternative method to make this connection. I'm interested in hearing from other K2 builders who may have used an alternative to P6 because of this interference issue. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K2] Issue with KAT2 connector
Well Dave, the "Elecraft-Correct Answer" is do it the way they recommend. Because of the modularity, I'd guess that when they're servicing K2's, they might swap in a known-good module to troubleshoot a problem. Changing the connector makes that hard[er]. That said, note that there are in fact two of those 2-pin Molex-type connectors on the RF board. Note also that the each of the 2 cables will reach to either connector. Swapping them will short the 12 V and blow your fuse[s] ... hopefully. I don't recommend changing one of the connectors, but I do recommend some bright nail polish on one of them [both sides] to lower the probability of misconnection. I'm sure you can deduce how I know this. :-) 73, Fred K6DGW - Northern California Contest Club - CU in the Cal QSO Party 1-2 Oct 2016 - www.cqp.org On 11/13/2015 2:43 PM, David Brown wrote: This post is for K2 builders that have the internal KAT2 ATU. I am completing a K2 build that will include the KAT2. The 2-pin connector (P6) on the K2 RF Board connects to the RF input on the KAT2. There is a clearance problem where inductor L20 overlaps the footprint of P6 on the RF board. This overlap is about 2 mm in my case. The recommended solution to this overlap is to simply unsolder L20 and roll it forward to eliminate this overlap. I am uncomfortable with this and am thinking about using an alternative method to make this connection. I'm interested in hearing from other K2 builders who may have used an alternative to P6 because of this interference issue. 73 Dave, K8AX __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 issue
Vic, Troubleshooting rule #1 - Suspect what you touched last, and resist the temptation to jump to conclusions. I would first suspect a voltage drop at the rigrunner (and its fuse) rather than a failed PA transistor. Check the voltage at the K2 end under full current load. Your 2.15 Amps at 10 watts seems about right, so that is not evidence enough to declare a bad PA transistor. I suggest that you remove the KAT2 (if installed) and operate the K2 directly into a known good 50 ohm dummy load before drawing any other conclusions. Test with 13.7 to 13.9 volts at the K2. You could have a wattmeter anomaly, or if no wattmeter, the load may not be exactly 50 ohms. If after taking those steps you still have less than 12 watts output (10w on 10 meters), then it is time to check the RF voltages (with the power set to 5 watts) at the Q5 and Q6 collectors. bases of Q7 and Q8, and the antenna jack and compare those to the values shown in the Transmit Signal Tracing portion of the manual. If those are correct and your maximum power output is still not up to par, then you can suspect the PA transistors. 73, Don W3FPR Vic K2VCO wrote: Tonight I decided to check out my K2, QRP configuration, for Field Day. I tried it on 40, 20 and 15 meters, and it put out a solid 14-15 watts, drawing about 3.5 amp. Then suddenly it went dark. The fuse in my rigrunner had blown. Silly me, I had plugged the K2 into a slot with a 2 amp fuse. I replaced the fuse with a 5 amp one, and started it up again. But now I can only get about 10w maximum when the power control was turned all the way up! Current draw is now about 2.15 a. So, did I blow one of my finals? And if so, could the blowing of the external fuse be the cause? No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.287 / Virus Database: 270.12.2/2074 - Release Date: 04/22/09 08:49:00 __ 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 issue
Don Wilhelm wrote: Vic, Troubleshooting rule #1 - Suspect what you touched last, and resist the temptation to jump to conclusions. I would first suspect a voltage drop at the rigrunner (and its fuse) rather than a failed PA transistor. Check the voltage at the K2 end under full current load. Did that. It was 13.1v as shown on the K3's internal meter. This was the same before and after the 'event'. Your 2.15 Amps at 10 watts seems about right, so that is not evidence enough to declare a bad PA transistor. I suggest that you remove the KAT2 (if installed) and operate the K2 directly into a known good 50 ohm dummy load before drawing any other conclusions. Test with 13.7 to 13.9 volts at the K2. You could have a wattmeter anomaly, or if no wattmeter, the load may not be exactly 50 ohms. OK, I'll try it. I have a good dummy load and a scope to check the power. Can I set the KAT2 to CALP or do I have to completely remove it? If after taking those steps you still have less than 12 watts output (10w on 10 meters), then it is time to check the RF voltages (with the power set to 5 watts) at the Q5 and Q6 collectors. bases of Q7 and Q8, and the antenna jack and compare those to the values shown in the Transmit Signal Tracing portion of the manual. If those are correct and your maximum power output is still not up to par, then you can suspect the PA transistors. OK. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco __ 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 issue
Tonight I decided to check out my K2, QRP configuration, for Field Day. I tried it on 40, 20 and 15 meters, and it put out a solid 14-15 watts, drawing about 3.5 amp. Then suddenly it went dark. The fuse in my rigrunner had blown. Silly me, I had plugged the K2 into a slot with a 2 amp fuse. I replaced the fuse with a 5 amp one, and started it up again. But now I can only get about 10w maximum when the power control was turned all the way up! Current draw is now about 2.15 a. So, did I blow one of my finals? And if so, could the blowing of the external fuse be the cause? -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco __ 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 issue
My K2/100 5312 started a new thing today. On PSK (my primary mode), it hangs up after xmission...i.e., in a mute mode...no power showing on external wattmeter and no audio. I must turn off and on radio to get receive. QSK CW is fine. Did I blow a diode or is this a software/interface issue? Thanks John AB8O ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 issue
John, Check to see if your CW dot paddle is being closed for some reason or other, or if your PSK interface is holding the PTT line active. (in the K2 both the dot input and PTT are the same). Without changing any of your settings, try connecting a microphone to the K2/100 and transmit voice - that is the same as transmitting PSK except the 'tones' are not the same. If it behaves with the microphone, suspect something in your interface box. If neither of those quick tests reveal any problem, the next step is to open the K2 to make some measurements while it is misbehaving. First measurement would be to measure the state of the 8R and 8T voltage rails to see if it is 'stuck in transmit' Those points are conveniently available at the anodes of D6 and D7 - D6 is driven by 8R and D7 is driven by 8T. 73, Don W3FPR John Wiener wrote: My K2/100 5312 started a new thing today. On PSK (my primary mode), it hangs up after xmission...i.e., in a mute mode...no power showing on external wattmeter and no audio. I must turn off and on radio to get receive. QSK CW is fine. Did I blow a diode or is this a software/interface issue? Thanks John AB8O ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.173 / Virus Database: 270.7.6/1716 - Release Date: 10/9/2008 9:44 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
