[Amps] CW and High Voltage

[Bob Maser]

Your latter is best because as you reduce drive, you reduce plate I, which 
increases the PLI, which needs to see different C1 and C2, assuming that you 
don't have a roller inductor.  Seems to me that on a 2K-4 one of the C's is 
switchable and you tune the other C and the L.

Bob
----- Original Message ----- 
From: "Steven Cook" <sccook1 at cox.net>
To: <Amps at contesting.com>
Sent: Saturday, September 03, 2005 1:50 AM
Subject: [Amps] CW and High Voltage


> Team,
>
> I've acquired an older Henry 2K-4, which only has one High Voltage setting 
> ~ 3500V no load.
>
> It runs a pair of 3-500z triodes and will be driven with ~100W
>
> My question concerns running the amp at reduced output on CW and if it is 
> better to:
>
> 1.  Apply full drive, and adjust C1 and C2 until the desired level of 
> output is achieved...
>
> or as some have suggested:
>
> 2.  Apply full drive, adjust C1 and C2 until maximum power is achieved, 
> then reduce the exciter drive without readjusting C1 or C2.
>
> What is the ramification of starting out with reduced drive, (like 25 or 
> 50 Watts) and adjusting C1 and C2 until maximum output is achieved?
>
> Less harmonic attenuation?  Some other undesirable effect?
>
> I'm curious because I've heard both approaches suggested and wonder what 
> the benefit or deleterious effect might be of one method vs. the other.
>
> Your thoughts...
>
> Steve (WG7K)
>
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