>
>
>-----Original Message-----
>From: Ian White, G3SEK <G3SEK@ifwtech.demon.co.uk>
>To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
>Date: 10 July 1999 20:31
>Subject: Re: [AMPS] RE: 4cx10000
>
>
>>
>>Tom Rauch wrote:
>>
>>>The proper way to tune a grounded grid PA is to actually
>>>OVER load the PA slightly, and then reduce power in operation.
>>>
>>I accept that heavier loading leads to better linearity, but please can
>>you explain why this is true?
>>
>>73 from Ian G3SEK
>
>My very simplistic view. If you look at the current curves,
>reducing the anode resistance tends to take the low voltage
>end of the load line away from the non-linear areas.
>
? indeed, Steve. In other words, by reducing RL (heavier loading), the
swing in instantaneious anode potential is limited to the most linear
region, so minimal distortion results.
- cheers
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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