>
>Steve Harrison wrote:
>>G3SEK and others have shown that even when the modulation
>>waveform is a two-tone test signal, that peaks of the two signals
combining
>>simultaneously can cause unexpected-high IMD levels due to peak tube
>>element currents which cause momentary voltage sag of power supplies with
>>high source impedance. The end result will be a propensity toward
>>generating buckshot on voice peaks even though on average, the IMD level
>>may well be acceptable.
>
>Credit GW4FRX for that good work.
>
Amen to that. It seems that the best IMD test is a real, live, human
voice.
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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