Re: [Elecraft] K3 Power Creep
Guy, K2AV contacted me direct and suggested I rerun the power calibration, something I had not done after loading the latest firmware. The power creep has been significantly reduced to the point of acceptability (2 to 4 watts vs 15 - 20 watts). Thanks, Guy, and shame on me for not trying that before I spoke. 73, Dan __ 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
[Elecraft] K3 Power Creep
I've seen this posted before, but just noticed it tonight, the first time I've operated the rig on the air since I fixed an intermittent last Saturday. I also just installed version 3.94. The posts I've seen before talked about SSB, but . . . . If I adjust the power control to the power I wish to transmit, when I first transmit the power starts out low but finally creeps up to the correct power output. If I watch the power meter (LP-100A), and even the power meter on the rig, if I have changed the power control going from say 15 watts to 100 watts, the first dits or dahs are at varying but constantly increasing power increments until it reaches its final resting place. It only takes a couple of seconds, if that. Once there, it stays put. Obviously better than a high initial power spike, but nonetheless it shouldn't be. Anyone else see this or am I the unfortunate one with this small issue? 73, Dan -- N3ND __ 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
Re: [Elecraft] K3 power creep
Same here. Its only on AFSK-A, not on FSK D. Henk PA5KT Joe Planisky schreef: > Hi Ron, > > I can't comment on whether this is normal or a problem, but I can > confirm that I see the same thing in AFSK-A mode, so it's not just > you :-) I believe it is ALC related. > > 73 > -- > Joe KB8AP > > > > On Feb 15, 2009, at 1:25 PM, Ron W3ZV wrote: > > >> ... >> > > >> Typically >> when changing from 300 watts to 250, I would see 180 out on first >> transmission, which would creep toward 250 during the transmission. >> This >> is what show on my amp PO meter, so it is somewhat less than a >> precision >> measurement. >> >> ... >> >> Is this normal, perhaps ALC related, or a problem. >> >> Ron W3ZV >> -- Henk Remijn PA5KT email: pa...@remijn.net www: www.remijn.net __ 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
Re: [Elecraft] K3 power creep
Hi Ron, I can't comment on whether this is normal or a problem, but I can confirm that I see the same thing in AFSK-A mode, so it's not just you :-) I believe it is ALC related. 73 -- Joe KB8AP On Feb 15, 2009, at 1:25 PM, Ron W3ZV wrote: > ... > Typically > when changing from 300 watts to 250, I would see 180 out on first > transmission, which would creep toward 250 during the transmission. > This > is what show on my amp PO meter, so it is somewhat less than a > precision > measurement. > > ... > > Is this normal, perhaps ALC related, or a problem. > > Ron W3ZV __ 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
[Elecraft] K3 power creep
My normal RTTY contest mode is S&P. I am using AFSK A mode. When I am doing this with my K3 and FL-7000, I set my drive so I get about 300 watts out of the amp. On the rare occasion that I try to hold a frequency long enough to run on it, I back off the power so that the amp runs 250 watts. Not much difference, but I feel better about it. I noticed during the CQ WPX that after each power change, the amp output is lower than expected and creeps up during the first transmission. All subsequent transmissions are where I want them and steady. Typically when changing from 300 watts to 250, I would see 180 out on first transmission, which would creep toward 250 during the transmission. This is what show on my amp PO meter, so it is somewhat less than a precision measurement. I had been using FSK in the past ( and will again shortly) and don't remember seeing this before. However, like my amp's PO meter, my memory is not a precision instrument. Is this normal, perhaps ALC related, or a problem. Ron W3ZV __ 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
