Re: [Elecraft] K3 Lost power
Hi Don, Yes, the problem is indeed in the terminal strip. Interesting that no load shows 13.8V but when connected to the K3 and the K3 is off, it then shows .5V at the terminal strip. Apparently everything else running off that strip is doing fine so it has to be at that junction. Now I'm just running it off the Astron directly and it's doing fine. Never had a problem with the strip before, something new to get my VOM soldering rig onto! :) 73, Gary KA1J Gary, I would submit that it is something internal -- but internal to the wiring harness or the terminal strip that you are using. The direct connection to the power source should indicate that this is not a K3 problem. 73, Don W3FPR On 1/23/2015 11:07 PM, Gary Smith wrote: Just a follow-up, I found the problem and it is in the DC terminal strip that must have a faulty component inside. It shows 13.8 V at the end of the wiring harness but when I connected it to the K-3 it dropped down to .5 V. I bypassed the terminal strip and connected to the power supply directly and the radio turns on with no issues. The connections to the terminal are tight so it has to be something internal. No chance to really compete in the contest but at least I can get back in the game and don't have to send the K-3 back home for surgery. __ 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 g...@ka1j.com --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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] K3 Lost power
I did to see if there was voltage at the plug there is. I was in the middle of transmitting and the radio went dead. No sign of life. Power supply is working just fine. Darn, I have put so much work into being ready for this contest. Gary KA1J Tried pulling the power cord and reconnecting? - GL - Steve WB6RSE On Jan 23, 2015, at 5:49 PM, Gary Smith g...@ka1j.com wrote: Was in the middle of the CQ 160 contest and the K3 shut down. There is power to the radio but it is dead in the water. The power supply is working fine, power getting to the rig, but nothing. No fuse on the chassis, any suggestions? Lousy time to lose the rig. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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] K3 Lost power
Hi Hank, Just removed the K3 from its harness and tested the RCA jack to see if it's shorted; Using the fluke it shows 500 ohms when the probes are reversed, there's an infinite reading so I'm assuming the diode is intact. Guess that's not this issue. Thanks for the idea though. 73, Gary KA1J Gary I had my K3 die in middle of qso - its turned out to be the reverse polarity diode that hangs from the 12v RCA jack to ground - it shorted dead (not a damn thing hanging on that RCA nor had there EVER been anything on it ) so that keeps the FET from letting the radio turn on -- check DCR from RCA jack to ground - just a chance --Its D35 a SMD 1N4007 or something like that if I remember - GL what a BUMMER -- 73 Hank -Original Message- From: Gary Smith Sent: Friday, January 23, 2015 6:49 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 Lost power Was in the middle of the CQ 160 contest and the K3 shut down. There is power to the radio but it is dead in the water. The power supply is working fine, power getting to the rig, but nothing. No fuse on the chassis, any suggestions? Lousy time to lose the rig. Thanks, Gary KA1J --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 pfizenma...@q.com --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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] K3 Lost power
Just a follow-up, I found the problem and it is in the DC terminal strip that must have a faulty component inside. It shows 13.8 V at the end of the wiring harness but when I connected it to the K-3 it dropped down to .5 V. I bypassed the terminal strip and connected to the power supply directly and the radio turns on with no issues. The connections to the terminal are tight so it has to be something internal. No chance to really compete in the contest but at least I can get back in the game and don't have to send the K-3 back home for surgery. Thanks again for the suggestion, I appreciate it. 73, Gary, KA1J Hi Hank, Just removed the K3 from its harness and tested the RCA jack to see if it's shorted; Using the fluke it shows 500 ohms when the probes are reversed, there's an infinite reading so I'm assuming the diode is intact. Guess that's not this issue. Thanks for the idea though. 73, Gary KA1J Gary I had my K3 die in middle of qso - its turned out to be the reverse polarity diode that hangs from the 12v RCA jack to ground - it shorted dead (not a damn thing hanging on that RCA nor had there EVER been anything on it ) so that keeps the FET from letting the radio turn on -- check DCR from RCA jack to ground - just a chance --Its D35 a SMD 1N4007 or something like that if I remember - GL what a BUMMER -- 73 Hank -Original Message- From: Gary Smith Sent: Friday, January 23, 2015 6:49 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 Lost power Was in the middle of the CQ 160 contest and the K3 shut down. There is power to the radio but it is dead in the water. The power supply is working fine, power getting to the rig, but nothing. No fuse on the chassis, any suggestions? Lousy time to lose the rig. Thanks, Gary KA1J --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 pfizenma...@q.com --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 g...@ka1j.com --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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] K3 Lost power
Gary, I would submit that it is something internal -- but internal to the wiring harness or the terminal strip that you are using. The direct connection to the power source should indicate that this is not a K3 problem. 73, Don W3FPR On 1/23/2015 11:07 PM, Gary Smith wrote: Just a follow-up, I found the problem and it is in the DC terminal strip that must have a faulty component inside. It shows 13.8 V at the end of the wiring harness but when I connected it to the K-3 it dropped down to .5 V. I bypassed the terminal strip and connected to the power supply directly and the radio turns on with no issues. The connections to the terminal are tight so it has to be something internal. No chance to really compete in the contest but at least I can get back in the game and don't have to send the K-3 back home for surgery. __ 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] K3 Lost power
don't have to send the K-3 back home for surgery: Good to hear, Gary! Phil W7OX On 1/23/15 8:07 PM, Gary Smith wrote: Just a follow-up, I found the problem and it is in the DC terminal strip that must have a faulty component inside. It shows 13.8 V at the end of the wiring harness but when I connected it to the K-3 it dropped down to .5 V. I bypassed the terminal strip and connected to the power supply directly and the radio turns on with no issues. The connections to the terminal are tight so it has to be something internal. No chance to really compete in the contest but at least I can get back in the game and don't have to send the K-3 back home for surgery. Thanks again for the suggestion, I appreciate it. 73, Gary, KA1J __ 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
