Help with High Current issues
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Help with High Current issues
 
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What is causing my my seemingly odd occurrence of a low SWR and a high current shutdown on my K3 ? It just happened this morning and is very worrisome.
Freq: 14.055SWR: 1.3:1Antenna: OCF dipoleSending Dits: Random Hi Curr warning for 45 sec and then a shutdownSending Dahs: Random Hi Curr warning for 10 sec and then a shutdownPower Supply: Gamma HPS-1aOther indications: dimming of backlight synched with XMIT approx 5 sec prior to shutdown Thanks for any help...this is a new issue Alan....K6ADG ______________________________________________________________ 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] |
Re: Help with High Current issues
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What is your K3 showing as the voltage when you change the DISP to read that instead of VFO-B frequency? Low voltage would cause the current to increase to keep the power where you set it.
> On Sunday, Jan 11, 2015, at Sunday, 10:30 AM, alan geller via Elecraft <[hidden email]> wrote: > > What is causing my my seemingly odd occurrence of a low SWR and a high current shutdown on my K3 ? It just happened this morning and is very worrisome. > Freq: 14.055SWR: 1.3:1Antenna: OCF dipoleSending Dits: Random Hi Curr warning for 45 sec and then a shutdownSending Dahs: Random Hi Curr warning for 10 sec and then a shutdownPower Supply: Gamma HPS-1aOther indications: dimming of backlight synched with XMIT approx 5 sec prior to shutdown > Thanks for any help...this is a new issue > Alan....K6ADG > ______________________________________________________________ > 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] |
Re: Help with High Current issues
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Well, as soon as I sent my SOS, I realized I was telling all, I was too lazy to switch to a beefier power supply to figure that out. Our course, your suggestion solved that issue so I am getting double slow on the neuron pathways.The voltage went from 13.5 V to 9.5V on the 6th (set for 20WPM) dash and shutdown is around 9.2 V.Soo, my conclusion has to be that the SuperCaps in my trusty small/expensive power supply are getting tired.I just this minute read a review of the HPS by Phil Salas – AD5X, and he got a 2V drop at 10 WPM, so my unit seems to be out of spec and that is a "different" issue for this generally useful product.Thank you all for your quick response.......Happy 2015
Alan....K6ADG On Sunday, January 11, 2015 10:45 AM, James Bennett <[hidden email]> wrote: What is your K3 showing as the voltage when you change the DISP to read that instead of VFO-B frequency? Low voltage would cause the current to increase to keep the power where you set it. > On Sunday, Jan 11, 2015, at Sunday, 10:30 AM, alan geller via Elecraft <[hidden email]> wrote: > > What is causing my my seemingly odd occurrence of a low SWR and a high current shutdown on my K3 ? It just happened this morning and is very worrisome. > Freq: 14.055SWR: 1.3:1Antenna: OCF dipoleSending Dits: Random Hi Curr warning for 45 sec and then a shutdownSending Dahs: Random Hi Curr warning for 10 sec and then a shutdownPower Supply: Gamma HPS-1aOther indications: dimming of backlight synched with XMIT approx 5 sec prior to shutdown > Thanks for any help...this is a new issue > Alan....K6ADG ______________________________________________________________ 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] |
Re: Help with High Current issues
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An HPS-1a with the K3 on CW is a stretch. The HPS-1a only works well with
100w with fairly limited duty cycle transmissions and even then doing tune-ups needs to be at about 20 watts or so. I was really interested in the HPS-1a idea some years back for portable use, but had to give it up. There were some number of verbal rebuffs on the idea among the experienced at Potomac Valley Radio Club meetings (contesters). This goes along with negative (for contest use) reviews at EHam at http://www.eham.net/reviews/detail/5784 Among other things, they reported that DXpeditions, with their tireless duty cycle, burned up HPS-1a's. To be robust, a K3 should be powered by a power supply capable of 30 amps continuous without sagging. Running on the cheep has various problems around the edges. You can use an HPS situationally, but don't look for anything beyond its true limits. Running compression will increase the current draw. The additional power is the point of compression. CW CQ's running with interspersed QSO's need to be planned with a 40% to 50% duty cycle. My RV with it's 65 amp inverter supplying the 13.8 volt DC battery rails is just good enough to additionally supply a pair of K3's direct from 13.8 DC rails in a CW field day setting without running down the batteries. The batteries are a pair of huge T105 6 volt golf cart batteries in series. A pair of K3's running draw way more than lights and other miscellaneous DC supplied devices on the RV's DC circuits. Makes the lights blink a little. 73, Guy K2AV On Sun, Jan 11, 2015 at 5:29 PM, alan geller via Elecraft < [hidden email]> wrote: > Well, as soon as I sent my SOS, I realized I was telling all, I was too > lazy to switch to a beefier power supply to figure that out. Our course, > your suggestion solved that issue so I am getting double slow on the neuron > pathways.The voltage went from 13.5 V to 9.5V on the 6th (set for 20WPM) > dash and shutdown is around 9.2 V.Soo, my conclusion has to be that the > SuperCaps in my trusty small/expensive power supply are getting tired.I > just this minute read a review of the HPS by Phil Salas – AD5X, and he got > a 2V drop at 10 WPM, so my unit seems to be out of spec and that is a > "different" issue for this generally useful product.Thank you all for your > quick response.......Happy 2015 > Alan....K6ADG > > > On Sunday, January 11, 2015 10:45 AM, James Bennett <[hidden email]> > wrote: > > > > What is your K3 showing as the voltage when you change the DISP to read > that instead of VFO-B frequency? Low voltage would cause the current to > increase to keep the power where you set it. > > > On Sunday, Jan 11, 2015, at Sunday, 10:30 AM, alan geller via Elecraft > <[hidden email]> wrote: > > > > What is causing my my seemingly odd occurrence of a low SWR and a high > current shutdown on my K3 ? It just happened this morning and is very > worrisome. > > Freq: 14.055SWR: 1.3:1Antenna: OCF dipoleSending Dits: Random Hi Curr > warning for 45 sec and then a shutdownSending Dahs: Random Hi Curr warning > for 10 sec and then a shutdownPower Supply: Gamma HPS-1aOther indications: > dimming of backlight synched with XMIT approx 5 sec prior to shutdown > > Thanks for any help...this is a new issue > > Alan....K6ADG > > > > > ______________________________________________________________ > 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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