[Amps] TL922A and AL80A

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>> > **  When a single 3-500Z is driven by 100w, IMD is not good.
>> 
>> You guys keep arguing about whether a single 3-500z can be run
>> linearly at 550mA anode current in SSB service. Has anyone
>> actually measured the difference in IMD for a single tube run
>> at 400mA and 550mA? Has anyone actually measured the IMD
>> from an AL-80B at various levels of anode current? I am so
>> sick of hearing this stupid back and forth pissing contest argument
>> that I am tempted to go out and buy an AL-80B, the additional
>> test equipment I would need, and do the test myself :) Talk is
>> cheap - where is the test data?
>> 
>	[Steve Katz]  I surely have no data, but I do have an AL80B on hand
>and it doesn't require anything close to 100W to drive to Ip >400mA.  In
>fact, my exciter in its TUNE position, which runs half power (50W CW) in
>that position, drives the AL80B, properly loaded, to >400mA Ip on all bands
>-- in some cases, to >500mA, after heavily loading it to keep Ig <100mA.
>Under those condx, efficiency is ~65% and Ep is ~2700V, e.g. 880W RF out for
>1350Wdc.  -WB2WIK/6
>> 
**   How many watts of drive is needed to produce 550mA of I-plate/anode?


-  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
www.vcnet.com/measures.  
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