[Amps] TL922A and AL80A

[Steve Katz]

> > **  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



> 73 de Mike,
> W4EF............................................................
> 
> 
> 
> 
> 
> 
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