Re: KPA 100 pA issues,,,, puzzle...
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Re: KPA 100 pA issues,,,, puzzle...
 
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initial symptom was the autotuner would lock up/ & reset the
radio when tuning ...only on 40 , so I ordered the PA upgrade kit... when running the k2 @ qrp .. the swr reads correct and the PA is basically out of the circuit,.,,,,"1.3" .... this is on 40. both on the set AND THE LP-100 now my LP100 is giving me a big clue what is going bad in my K2/100 PA..... The problem is that I still don't understand enough of the basics../.. but when i dial up over 15 watts the swr reads 9.98 !!! but when i go back to under 15 watts .... the swr reads correctly...(LP-100) I know something is wacky in the kpa100.... and i thought it was in the tuner... I have just completed the last of the upgrades to the KPA , but it appears to not have helped... oN TYHE k2/100 the swr seems to read double when on the PA vs the qrp,....on the other bands , but 40 has bigger /*issues...such as locking up the autotuner... .which was the original sympton... on 20 ,,,ssb xmit on , no modulation.... I get 9.9 swr on the lp-100 ...but when i modulate i get the real 1.6 swr .... and on the dummy load everything is fine ,,,,,,& none of the other radios including another k2/100 split in a EC2 case have problems with the antennas.... AND I WAS WANTING TO START MAKING CABLES FOR THE K3.... bill _______________________________________________ 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 |
Re: Re: KPA 100 pA issues,,,, puzzle...
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you seems to have a bad solder on the band pass section on the
KPA100. If you have problem on 40m only, take a look at L4, L5 and L6. hope this help. Le 07-10-10 à 16:04, Bill NY9H a écrit : > initial symptom was the autotuner would lock up/ & reset the radio > when tuning ...only on 40 , so I ordered the PA upgrade kit... > > when running the k2 @ qrp .. the swr reads correct and the PA is > basically out of the circuit,.,,,,"1.3" .... this is on 40. both > on the set AND THE LP-100 > > now my LP100 is giving me a big clue what is going bad in my K2/100 > PA..... > The problem is that I still don't understand enough of the basics../.. > but when i dial up over 15 watts the swr reads 9.98 !!! but when > i go back to under 15 watts .... the swr reads correctly...(LP-100) > > I know something is wacky in the kpa100.... and i thought it was > in the tuner... > > I have just completed the last of the upgrades to the KPA , but it > appears to not have helped... > > oN TYHE k2/100 the swr seems to read double when on the PA vs the > qrp,....on the other bands , but 40 has bigger /*issues...such as > locking up the autotuner... .which was the original sympton... > > on 20 ,,,ssb xmit on , no modulation.... I get 9.9 swr on the > lp-100 ...but when i modulate i get the real 1.6 swr .... > > and on the dummy load everything is fine ,,,,,,& none of the other > radios including another k2/100 split in a EC2 case have problems > with the antennas.... > > > AND I WAS WANTING TO START MAKING CABLES FOR THE K3.... > > bill > > _______________________________________________ > 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 Jean-François Ménard [hidden email] _______________________________________________ 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 |
Re: Re: KPA 100 pA issues,,,, puzzle...
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In reply to this post by Bill Steffey NY9H
Bill,
Those symptoms sound familiar. I believe your KPA100 is oscillating at about 600 kHz. During the KPA100UPKT installation, did you change C31? There is an omission in the kit contents and the instructions right now which is trying to be corrected, but has not yet been completed. If you did not change C31 to a 0.22 uf capacitor, send a note to [hidden email] and ask for one - the part number is E530295. Installation of the larger value for C31 will stop an oscillation at about 600 kHz (what frequency does the LP100 say is being transmitted). Note for others following this thread - the C31 change is *only* to be installed if the KPA100UPKT has been installed. 73, Don W3FPR Bill NY9H wrote: > initial symptom was the autotuner would lock up/ & reset the radio > when tuning ...only on 40 , so I ordered the PA upgrade kit... > > when running the k2 @ qrp .. the swr reads correct and the PA is > basically out of the circuit,.,,,,"1.3" .... this is on 40. both on > the set AND THE LP-100 > > now my LP100 is giving me a big clue what is going bad in my K2/100 > PA..... > The problem is that I still don't understand enough of the basics../.. > but when i dial up over 15 watts the swr reads 9.98 !!! but when i > go back to under 15 watts .... the swr reads correctly...(LP-100) > > I know something is wacky in the kpa100.... and i thought it was in > the tuner... > > I have just completed the last of the upgrades to the KPA , but it > appears to not have helped... > > oN TYHE k2/100 the swr seems to read double when on the PA vs the > qrp,....on the other bands , but 40 has bigger /*issues...such as > locking up the autotuner... .which was the original sympton... > 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 |
Re: Re: KPA 100 pA issues,,,, puzzle...
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876 Khz...... and scott has the part on it's way... tnx Don.... bill At 06:21 PM 10/10/2007, you wrote: >Bill, > >Those symptoms sound familiar. I believe your KPA100 is oscillating >at about 600 kHz. > >During the KPA100UPKT installation, did you change C31? There is an >omission in the kit contents and the instructions right now which is >trying to be corrected, but has not yet been completed. > >If you did not change C31 to a 0.22 uf capacitor, send a note to >[hidden email] and ask for one - the part number is E530295. > >Installation of the larger value for C31 will stop an oscillation at >about 600 kHz (what frequency does the LP100 say is being transmitted). >Note for others following this thread - the C31 change is *only* to >be installed if the KPA100UPKT has been installed. > >73, >Don W3FPR > >Bill NY9H wrote: >>initial symptom was the autotuner would lock up/ & reset the radio >>when tuning ...only on 40 , so I ordered the PA upgrade kit... >> >>when running the k2 @ qrp .. the swr reads correct and the PA is >>basically out of the circuit,.,,,,"1.3" .... this is on 40. both >>on the set AND THE LP-100 >> >>now my LP100 is giving me a big clue what is going bad in my K2/100 PA..... >>The problem is that I still don't understand enough of the basics../.. >>but when i dial up over 15 watts the swr reads 9.98 !!! but when >>i go back to under 15 watts .... the swr reads correctly...(LP-100) >> >>I know something is wacky in the kpa100.... and i thought it was >>in the tuner... >> >>I have just completed the last of the upgrades to the KPA , but it >>appears to not have helped... >> >>oN TYHE k2/100 the swr seems to read double when on the PA vs the >>qrp,....on the other bands , but 40 has bigger /*issues...such as >>locking up the autotuner... .which was the original sympton... _______________________________________________ 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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