>At 10:13 1997-12-11 -0800, you wrote:
>>... ...
>>>Have used the amp for four years in G2DAF configuration. In my opinion
>>>a very clever design wich also contributes to the stability.
>>>
>>The G2DAF circuit works fairly well with two-tone linearity tests --
>>*provided* that one uses minimal grid current.
>>- Eimac tells us that constant screen voltage is imperative for good
>>linearity. During a two-tone test on a G2DAF amplifier, the screen
>>potential is constant.
>>- Two friends built G2DAF amplifiers. They conducted two-tone tests.
>>The linearity was acceptable as long as they kept the grid current low.
>>I measured the IMD of these amplifiers, on the air when SSB
>>voice-modulation was in use. The total IMD products from either
>>amplifier was in the 21 - 23 db range when normal amounts of grid current
>>were flowing. (measurements were referenced against HP-355 step
>>attenuators}
>>.
>Exactly Rich, thats why I think that 2-tone measurements are very
>questionable. I mean, none of us (I hope) have a 2-tone speech/voice
>quality...and thats why I want to do more measurements on my amp as well as on
>factory designed conventional amps for comparison.
ok
>>Most people won't tell me when my zipper is down, Lars.
>>
>>Rich...
>
>Thats to bad Rich, not only for me, but maybe even in a higher degree for
>you...! ;)
I got one e-mail saying that unzipped/fly down is called 'trolling for
bimbos' in Texas.
cheers
Rich...
R. L. Measures, 805-386-3734, AG6K
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