At 10:13 1997-12-11 -0800, Rich Measures wrote:
>- 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}
>.
This makes me curious, as I`m trying to define a different methode to measure
IMD myself...
Exactly how, did you do that Rich?
What point in the the speech envelope did you use as reference?
What word/phrase was used?
How did you establish a constant reference?
What bandwidth did you cover?
How did the IMD products decay? i.e. what level at say 5 KHz from f0?
/Lars
>>Read in the archive that some of you "wiseguys" stated that the G2DAF
>>design was as close to class C as you could get. Bullshit!
>>
>>During the period I`ve used my amp I have`nt got a single complaint abt
>>beeing "to broad".
>
>Most people won't tell me when my zipper is down, Lars.
>
>Rich...
>
>R. L. Measures, 805-386-3734, AG6K
>
>
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Lars Harlin Private: lars.harlin@pocab.se
Gräftågränd 22 Hobby: sm3bdz@pobox.com
S-831 71 Östersund Work: http://www.pocab.se
Sweden
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