[AMPS] Tuned Input Circuit Q

2 2@vc.net
Mon, 8 Oct 2001 06:38:42 -0700

>> Denny Had thought otherwise for years.
>> Eimac still honored their warranty, and the FCC
>> did not seem to care.
>None of that matters Phil, because none of that means anything.
>None of them are concerned about what improper Q or circuit style 
>would do.
>The only potential problems are a lack of maximum efficiency and 
>IMD performance in cases where the harmonics distort cathode 
>waveform, or exciter shutdown in solid state rigs if cathode 
>harmonics make it back to the SWR sensing system.
>The first time I ever saw a severe problem was in a homebrew pair 
>of 3-500Z's, that only made 45% efficiency on 15 meters despite a 
>perfect SWR on the input, and two-tone was -32 3rd below one 
>tone. Doing a proper tuned input raised everything to normal ranges.
>The FCC, Eimac's warranty dept, and Denny Had would never care 
>about something like that.
//  So why does the AL-1200 reportedly have low efficiency on 15m and 10m?

-  R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.  

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