-----Original Message-----
From: measures <2@vc.net>
To: Colin Lamb <k7fm@teleport.com>; AMPS <amps@contesting.com>
To: <amps@contesting.com>
Date: 30 March 2000 21:15
Subject: Re: [AMPS] Is screen potential important?
>> Logic tells us that for any particular grid drive,
>>there must be a certain screen voltage that will yield the desired plate
>>current (to achieve linearity).
>
>. There is no certain screen voltage. This screen potential is always
>1500v unless you need to make less suds. . My guess is that c. 250v on
>the screen would be needed for 1500w out.
>
Hang on - you repeatedly remind us that +ve grid voltage/grid current
results in non-linear amplification in amps where screen voltage is fixed.
The non-linearity can be fixed by varying the screen volts with drive. The
DAF system always runs +ve grid voltage. For a range of +ve grid volts,
there will be a range of screen volts (probably not constant) which give the
correct anode current for linear operation.
Steve
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