Power 160M
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Hi all
I Noticed that during the cq 160m contest this weekend that I could not get more than 4 watts out of my K2 The Requested power goes up to 15.2 of course but I cannot get more than 4 and on the first transmit I get a momentary Hi current. My power supply is steady on voltage and current. I switched the display on the K2 to display V/I and the voltage drops on transmit and the current goes up to about 2.4. This is within the Cal Current range. Now on 40 meters it is fine it puts out 14 watts. same with 30m. I haven't tried the other bands. Also the Requested power on 160m does not match at any request of power through out the range from lowest to highest. Is this connected? Thanks David KR4OW K2 4320 ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping _______________________________________________ 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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David,
Your CAL CUR setting is limiting the power output. Yes, the current is trying to be excessive and the K2 cuts back on the power to limit the current. The Hi Cur message says that the microprocessor has done just that. Most of the time the cure to that problem lies in the low pass filter. Check the K160RX board toroids for the correct number of turns (count the number passing through the center of the core), check the capacitor values and check your soldering. If you continue to have trouble, check T4 as well. 73, Don W3FPR David N. wrote: > Hi all > I Noticed that during the cq 160m contest this weekend > that I could not get more than 4 watts out of my K2 > The Requested power goes up to 15.2 of course but I > cannot get more than 4 and on the first transmit I get > a momentary Hi current. My power supply is steady on > voltage and current. I switched the display on the K2 > to display V/I and the voltage drops on transmit and > the current goes up to about 2.4. This is within the > Cal Current range. Now on 40 meters it is fine it puts > out 14 watts. same with 30m. I haven't tried the other > bands. Also the Requested power on 160m does not match > at any request of power through out the range from > lowest to highest. Is this connected? > Thanks > David KR4OW > K2 4320 > > > 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 KR4OW
David
In addition to the other comments, you antenna may be a factor. If you have a dummy load (if not try to make one that can handle 5 watts or so) try it. If your K2 is not operating into a reasonable match, of course it will limit the transmit output to protect the power transistors. If all is well with the load, then check your 160 board as suggested. The low power output of my K2 will output 5 or more watts into a 2.5:1 match (that I used to run before i upgraded my tuner). In my case the KPA100 is less forgiving, requireing a better match on 160m, FYI. 73, curt --- "David N." <[hidden email]> wrote: > Hi all > I Noticed that during the cq 160m contest this > weekend > that I could not get more than 4 watts out of my K2 > The Requested power goes up to 15.2 of course but I > cannot get more than 4 and on the first transmit I > get > a momentary Hi current. My power supply is steady on > voltage and current. I switched the display on the > K2 > to display V/I and the voltage drops on transmit and > the current goes up to about 2.4. This is within the > Cal Current range. Now on 40 meters it is fine it > puts > out 14 watts. same with 30m. I haven't tried the > other > bands. Also the Requested power on 160m does not > match > at any request of power through out the range from > lowest to highest. Is this connected? > Thanks > David KR4OW > K2 4320 > > > > > Looking for last minute shopping deals? > Find them fast with Yahoo! Search. > http://tools.search.yahoo.com/newsearch/category.php?category=shopping > _______________________________________________ > 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 > ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ _______________________________________________ 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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