K3/KPA500
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I wonder if anybody else is observing this.
The first few CW characters do not develop full power as indicated by the LED power displays. My gut feeling is that LED power displays should be fast enough to capture the "true" power for even the first couple characters. Switching to the PK HOLD option doesn't show this even for a single dit. Some time constants are evidently built into the metering. I wonder if Elecraft has built in time constants to confirm to the old FCC specs for meters which are intended to read PEP power? I do wish the K3 FSK output powers for the two frequencies would be equalized one of these days. 73 de Brian/K3KO ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1424 / Virus Database: 2113/4856 - Release Date: 03/07/12 ______________________________________________________________ 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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Hi Brian:
Just want to give you a datapoint regarding your comment about different power output for the 2 FSK frequencies. I just tested my K3 (#202) using a jumper across the FSK input on the ACC connector and using my Diamond SX-200 power meter I can not see any difference in power at all on the two frequencies. I checked at low power (5W), mid power (60 W) and 100W. The needle on the meter doesn't move when I key the FSK input. It is not my intent to start an argument about this, but just thought you might want to know my observations. 73, Ken K3IU ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ On 3/7/2012 8:34 AM, Brian Alsop wrote: > I wonder if anybody else is observing this. > > The first few CW characters do not develop full power as indicated by > the LED power displays. > > My gut feeling is that LED power displays should be fast enough to > capture the "true" power for even the first couple characters. > > Switching to the PK HOLD option doesn't show this even for a single dit. > > Some time constants are evidently built into the metering. > > I wonder if Elecraft has built in time constants to confirm to the old > FCC specs for meters which are intended to read PEP power? > > I do wish the K3 FSK output powers for the two frequencies would be > equalized one of these days. > > 73 de Brian/K3KO > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1424 / Virus Database: 2113/4856 - Release Date: 03/07/12 > > ______________________________________________________________ > 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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I was also one of the 'unequal fsk tone' reporters. However, with
the arrival of a W2 I also confirmed that the two tones are set to the same level as determined by measuring each tone separately (and statically). Therefore I've concluded the flickering power output when running diddles on rtty must be caused by transients in the tone to tone switching (ie non zero crossing switching or the like) Mark n2qt -----Original Message----- From: Ken K3IU Sent: Wednesday, March 07, 2012 2:18 PM To: Brian Alsop ; Elecraft Reflector Subject: Re: [Elecraft] K3/KPA500 Hi Brian: Just want to give you a datapoint regarding your comment about different power output for the 2 FSK frequencies. I just tested my K3 (#202) using a jumper across the FSK input on the ACC connector and using my Diamond SX-200 power meter I can not see any difference in power at all on the two frequencies. I checked at low power (5W), mid power (60 W) and 100W. The needle on the meter doesn't move when I key the FSK input. It is not my intent to start an argument about this, but just thought you might want to know my observations. 73, Ken K3IU ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ On 3/7/2012 8:34 AM, Brian Alsop wrote: > I wonder if anybody else is observing this. > > The first few CW characters do not develop full power as indicated by > the LED power displays. > > My gut feeling is that LED power displays should be fast enough to > capture the "true" power for even the first couple characters. > > Switching to the PK HOLD option doesn't show this even for a single dit. > > Some time constants are evidently built into the metering. > > I wonder if Elecraft has built in time constants to confirm to the old > FCC specs for meters which are intended to read PEP power? > > I do wish the K3 FSK output powers for the two frequencies would be > equalized one of these days. > > 73 de Brian/K3KO > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1424 / Virus Database: 2113/4856 - Release Date: 03/07/12 > > ______________________________________________________________ > 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 ______________________________________________________________ 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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