Power problems K3
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A friend is using my K3 while his is in the shop When he transmit's on the K-3 running a specific power out he notices that the power especially on RTTY will start at a lower output that what was dialed in and gradually raise its output to the maximum dialed in. This seems to be worse on 15 m. It only appears to happen once then will not repeat on same freq. So if a specific power like 100W is dialed in watching his W-2 watt meter the power may start at 60 watts then ramp up to 100 watts usually on RTTY.
Any ideas. Thanks Hugh W4DRH THANK YOU for deleting my address, any other addresses, and personal information, from this e-mail, if you plan to forward it. THANK YOU also for using "Bcc" instead of "To" and "Cc" when initiating both individual and group e-mails. This helps prevent spammers, hackers and radicals from obtaining addresses, and thus the proliferation of spam. ______________________________________________________________ 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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Hi Hugh,
If he's using AFSK from a PC there's a few things he'll want to verify. The K3 should be set to digital mode AFSK A? The audio output from his PC should be attached to the K3 line input. The output level of the PC and MIC setting of the K3 should be adjusted so that 4 bars of the K3 ALC meter are solidly lit with the 5th bar flickering. 73, Mike K2MK
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In reply to this post by SouthCarolinaDolphin
Hugh,
Does he have enough audio drive to illuminate 4 bars solid with the 5th bar flashing on the ALC meter? If he does not supply sufficient audio to the K3 it will "power hunt" with the results you stated. The power should be adjusted using the power knob and not by adjusting the audio drive. There is another instance where the K3 will start out at a lower power than the requested power, and that is after a bend change or a change in the setting of the power knob. The power will start out low, but quickly come up to the requested level. But then it will stay correct until another band or power level change. IMHO, that behavior is better than spiking the power as some other rigs have a tendency to do. 73, Don W3FPR On 12/1/2014 3:29 PM, SouthCarolinaDolphin wrote: > A friend is using my K3 while his is in the shop When he transmit's on the K-3 running a specific power out he notices that the power especially on RTTY will start at a lower output that what was dialed in and gradually raise its output to the maximum dialed in. This seems to be worse on 15 m. It only appears to happen once then will not repeat on same freq. So if a specific power like 100W is dialed in watching his W-2 watt meter the power may start at 60 watts then ramp up to 100 watts usually on RTTY. > Any ideas. Thanks > Hugh W4DRH > ______________________________________________________________ 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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He should also re-do the automated 5- and 50-watt power calibration on all bands using K3 Utility and a dummy load.
73, Wayne N6KR On Dec 1, 2014, at 1:43 PM, Don Wilhelm <[hidden email]> wrote: > Hugh, > > Does he have enough audio drive to illuminate 4 bars solid with the 5th bar flashing on the ALC meter? > If he does not supply sufficient audio to the K3 it will "power hunt" with the results you stated. > The power should be adjusted using the power knob and not by adjusting the audio drive. > > There is another instance where the K3 will start out at a lower power than the requested power, and that is after a bend change or a change in the setting of the power knob. The power will start out low, but quickly come up to the requested level. But then it will stay correct until another band or power level change. IMHO, that behavior is better than spiking the power as some other rigs have a tendency to do. > > 73, > Don W3FPR > > On 12/1/2014 3:29 PM, SouthCarolinaDolphin wrote: >> A friend is using my K3 while his is in the shop When he transmit's on the K-3 running a specific power out he notices that the power especially on RTTY will start at a lower output that what was dialed in and gradually raise its output to the maximum dialed in. This seems to be worse on 15 m. It only appears to happen once then will not repeat on same freq. So if a specific power like 100W is dialed in watching his W-2 watt meter the power may start at 60 watts then ramp up to 100 watts usually on RTTY. >> Any ideas. Thanks >> Hugh W4DRH >> > > ______________________________________________________________ > 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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