K3 Configuration
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Hi all,
Can I redo the K3 config on 5W with the PA physically in place or do I need to remove it? I am no at all happy with the output power so I want to go through the config again. Like others, I find that on SSB, the output does not peak at all well. TX ALC is on but my TXGN HP Pr80 is down at 20, much lower than I have seen in other reports. 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC DX Cluster Member RSGB, GQRP K2 #4044 |K3 #455 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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G'morning Ian:
No, you don't have to remove the KPA3. You can do gain calibration procedure at any time. Just set power to exactly 5.0 watts, press tune, do it on all bands; then set power to 50.0 watts and do the same thing. 73, Ken K3IU Ian J Maude wrote: > Hi all, > Can I redo the K3 config on 5W with the PA physically in place or do I > need to remove it? I am no at all happy with the output power so I > want to go through the config again. Like others, I find that on SSB, > the output does not peak at all well. > TX ALC is on but my TXGN HP Pr80 is down at 20, much lower than I have > seen in other reports. > > 73 Ian > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Ian Maude
You don't need to remove KPA3 for anything unless it's failed. There's a separate calibration for the 5W and 50W levels on page 46 in the manual, but they don't interact since the switchpoint between the two amps is 12/13W. 73, Bill |
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In reply to this post by Ian Maude
Ian J Maude wrote:
> Hi all, > Can I redo the K3 config on 5W with the PA physically in place or do I > need to remove it? I am no at all happy with the output power so I > want to go through the config again. Like others, I find that on SSB, > the output does not peak at all well. > TX ALC is on but my TXGN HP Pr80 is down at 20, much lower than I have > seen in other reports. OK, this is what I did. I set KPA3 to 'PAio nor'. I then started at the beginning and did the Synthesizer calibration, then set the reference oscillator to RWM on 9996 kHz. I then ran the 5W calibration and then, after enabling the PA again, the 50W calibration. The output seems much better now but i am going to have to get it on a decent calibrated wattmeter to be certain of actual output power. TXGN HP Pr80 is now at 32, in line with other postings. The question is, how did it change? I had set all of this initially of course in the build. In the manual, once you have finished the calibrations, it says to turn off TECH MD. Could it have something to do with this? I had not turned it off as I like to see things like PA temp etc and I believe you have to have it on to see the extended displays. Sorry if I seem thick, I am just trying to get my head around this. 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC DX Cluster Member RSGB, GQRP K2 #4044 |K3 #455 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Hallo Ian,
> In the manual, once you have finished the calibrations, it says to turn > off TECH MD. You don't really have to turn off the TECH MODE. The manual, imho, tells you to (suggests that you) turn off the TECH MODE, so that the chance of changing a sensitive menu item by mistake is reduced. I sometimes have it on and sometimes have it off. The SSB power level problems discussed recently on the reflector don't appear to be caused by the calibration at 1mW, 5w and 50W. Elecraft is, afaik, working on a fix, and I assume it will have been dealt with in the next major firmware update. <fingers="crossed"> vy 73 de toby -- DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz) K2 #885 K2/100 #3248 K3/100 #67 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Toby Deinhardt wrote:
> Hallo Ian, > >> In the manual, once you have finished the calibrations, it says to >> turn off TECH MD. > > You don't really have to turn off the TECH MODE. The manual, imho, > tells you to (suggests that you) turn off the TECH MODE, so that the > chance of changing a sensitive menu item by mistake is reduced. I > sometimes have it on and sometimes have it off. Thanks for that Toby. I am trying to work out why my original calibration had changed. It can only be from firmware updates and I guess I was wondering whether having TECH MD set to ON could cause this issue? > > The SSB power level problems discussed recently on the reflector don't > appear to be caused by the calibration at 1mW, 5w and 50W. Elecraft > is, afaik, working on a fix, and I assume it will have been dealt with > in the next major firmware update. <fingers="crossed"> My calibration was somewhat off. Having run through it again, I am happy enough with the output of the K3. At 50W on tune I can get 400W from my Ranger 811 (about what I would expect). On SSB however, it is only about half that, regardless of mic. 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC DX Cluster Member RSGB, GQRP K2 #4044 |K3 #455 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by dj7mgq
It's always a good idea to store your latest working configuration using the Configuration Save utility inside the download utility. If you should accidentally change something with TECH MD ON, you can easily Restore it using this function. 73, Bill |
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In reply to this post by Ian Maude
I think if you set CONFIG: KPA3 = PA BYP
and set PWR below 12w that will work. however, SSB has been greatly improved as of late - ensure you are running latest firmware and try that first. -- "There is no limit to what you can accomplish if you don't care who gets the credit." --Ronald Reagan On 22 Mar 2008, at 10:02, Ian J Maude wrote: > Hi all, > Can I redo the K3 config on 5W with the PA physically in place or do > I need to remove it? I am no at all happy with the output power so > I want to go through the config again. Like others, I find that on > SSB, the output does not peak at all well. > TX ALC is on but my TXGN HP Pr80 is down at 20, much lower than I > have seen in other reports. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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