[Elecraft] Re: [LP-100] Re: KPA 100 pA issues,,,, puzzle...

[Larry Phipps]

Almost sounds like a parasitic oscillation, Bill. Have you scoped the 
output?

73,
Larry N8LP



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...
>
> 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
>
>
>
>  
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