>>Is it worth going beyond -40dB on HF ? Or even -20 during a contest !
>I'd doubt it - though I have seen military specs calling for -60dB on two
>tones in the passband such that the 7th order IP's were in band. Since HF
>can raeley give 60dB SNR, I don't see the point.......
>>? People purchase automobiles that will go faster than the 65 miles per
>>hour speed limit. My wife drives one that will go 3db faster. The
>>8171/4CX10,000D can be run at 10db gain or 20db gain.
>If the amp follows the usual '3 for 1' 3rd order IMD rule, an amp that runs
>-40dB 3rd order IMD at 1kW out should be -34 at 2kW,...
? Probably not in this case. To get 10db-gain / 1400 w out of mine, I
ran it in Class A instead of Class AB1.
- later, Peter.
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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