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[AMPS] Tetrode poor IMD performance

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Subject: [AMPS] Tetrode poor IMD performance
From: W8JI@contesting.com (Tom Rauch)
Date: Wed, 15 Aug 2001 17:39:02 -0400
Hi All,

Does anyone have any idea why tetrode amps like the one just 
reviewed in QST seem to have such poor IMD performance?

Is it the tube, the circuitry, or a testing error? I mean, -29dB ala 
ARRL is really -23dB using commercial standards. That's pretty 
nasty.

I'd hate like hell to have a bunch of them near me, or was 
something else going on?? 

I was bothered about 25kHz away by a guy in Florida using one a 
few weeks ago (he was on 1850 SSB, I was on 1823 CW) but I 
blamed it on his TS-2000. Now I'm wondering which was actually at 
fault.
73, Tom W8JI
W8JI@contesting.com 

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