K3 power reduction after using TEST mode
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My fist has been getting rusty so I've begun practicing sending CW by putting the K3 into TEST mode and sending paragraphs of text. I discovered that when going back to normal TX mode, the power output was drastically reduced. At first I thought I was accidentally turning the power knob to adjust keying speed so today I conducted a controlled experiment.
I set the K3 keying speed to 23 WPM and did not readjust it. I found that it is necessary to send CW in TEST mode for about 5 minutes for the condition to occur. I tried it on 3 bands at 3 different power levels. In each case I noted the power before going into TEST mode and then after 5 minutes I noted the power after exiting TEST mode. The power was read on my PowerMaster meter into a dummy load but a touch of the K3 POWER knob confirmed that the K3 and the PowerMaster agreed with each other. Here's what I found. 17 meters: power reduced from 29 watts to 5.2 watts 20 meters: power reduced from 24 watts to 5.1 watts 30 meters: power reduced from 100 watts to 5.0 watts Give it a try. 73, Mike K2MK |
Re: K3 power reduction after using TEST mode
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In a recent message, Mike K2MK <[hidden email]> wrote ...
>Here's what I found. > >17 meters: power reduced from 29 watts to 5.2 watts >20 meters: power reduced from 24 watts to 5.1 watts >30 meters: power reduced from 100 watts to 5.0 watts > >Give it a try. I have just tried it, Mike, and cannot reproduce your phenomenon here. Maybe it's something to do with your antenna matching? My firmware is v3.79 with dsp 2.54. 73 -- David G4DMP Leeds, England, UK ------ ______________________________________________________________ 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 Mike K2MK
Firmware & DSP versions?
On Tue, Apr 13, 2010 at 10:40 AM, Mike K2MK <[hidden email]> wrote: > > My fist has been getting rusty so I've begun practicing sending CW by putting > the K3 into TEST mode and sending paragraphs of text. I discovered that when > going back to normal TX mode, the power output was drastically reduced. At > first I thought I was accidentally turning the power knob to adjust keying > speed so today I conducted a controlled experiment. > > I set the K3 keying speed to 23 WPM and did not readjust it. I found that it > is necessary to send CW in TEST mode for about 5 minutes for the condition > to occur. I tried it on 3 bands at 3 different power levels. In each case I > noted the power before going into TEST mode and then after 5 minutes I noted > the power after exiting TEST mode. The power was read on my PowerMaster > meter into a dummy load but a touch of the K3 POWER knob confirmed that the > K3 and the PowerMaster agreed with each other. > > Here's what I found. > > 17 meters: power reduced from 29 watts to 5.2 watts > 20 meters: power reduced from 24 watts to 5.1 watts > 30 meters: power reduced from 100 watts to 5.0 watts > > Give it a try. > > 73, > Mike K2MK > -- > View this message in context: http://n2.nabble.com/K3-power-reduction-after-using-TEST-mode-tp4896438p4896438.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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 > 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 |
Re: K3 power reduction after using TEST mode
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In reply to this post by Mike K2MK
Unable to reproduce here. FW 3.79/2.54.
73 -- Joe KB8AP On Apr 13, 2010, at 7:40 AM, Mike K2MK wrote: > > ...I've begun practicing sending CW by putting > the K3 into TEST mode and sending paragraphs of text. I discovered > that when > going back to normal TX mode, the power output was drastically > reduced. ... > 73, > Mike K2MK ______________________________________________________________ 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 Guy, K2AV
Hi Guy:
Additional information. Firmware MCU 3.79, DSP 2.54 No antenna involved. Dummy load only. VOX on (not QSK) CWT on TEXT DEC off Internal keyer used, set to 23 WPM but other speeds do it too External paddle (non-iambic). CONFIG:CW IAMB.......A CONFIG:CW PADL......tip=dot CONFIG:CW WGHT....1.05 73, Mike K2MK
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In reply to this post by Joe Planisky
3.84/2.54 here. Unable to reproduce behavior.
73, Guy On Tue, Apr 13, 2010 at 11:21 AM, Joe Planisky <[hidden email]> wrote: > Unable to reproduce here. FW 3.79/2.54. > > 73 > -- > Joe KB8AP > > > On Apr 13, 2010, at 7:40 AM, Mike K2MK wrote: > >> >> ...I've begun practicing sending CW by putting >> the K3 into TEST mode and sending paragraphs of text. I discovered >> that when >> going back to normal TX mode, the power output was drastically >> reduced. > ... > >> 73, >> Mike K2MK > > ______________________________________________________________ > 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 > 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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