>
>2 wrote:
>> One factor that apparently
>>increased the Warrior's VHF instability was so-called "neutralization".
>
>"So-called" is correct. According to the schematics, it consisted of a
>feedback capacitor from the output end of the pi-tank, back to the
>cathode. This will produce feedback of variable amplitude and phase,
>depending on the settings of the bandswitch and the tuning and loading
>controls. It's hardly surprising that the amp was more liable to
>oscillate at some frequency.
>
>>
>>Heath did not use neutralization in its subsequent models of GG
>>amplifiers.
>
>A wise decision, since it never could possibly do what it was intended
>to.
>
>>Gonset also used neutralization in their 4, 811 amplifier.
>
>I'm not familiar with that schematic: would that be real neutralization,
>or more of the bogus kind?
>
// The latter, Ian
cheers
- R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
end
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