On Jun 30, 2006, at 8:11 AM, Tom W8JI wrote:
>> So by you saying "almost", your saying it could happen?
> When we can't possibly know every circumstance in the world,
> never couldn't apply.
> Besides, VHF starts at 30 MHz. An oscillation at 30MHz in a
> tank resonant near ten meters could be a problem since it
> would pass right through the tank.
When grounded, a 3-500Z's grid resonates c. 88MHz. At resonance and
above resonance, the grid is semi-transparent. As frequency
decreases below resonance, the grid acts as a better and better
shield between the anode-output and the cathode-input. Thus,
parasitic oscillations at 30MHz in a 3-500 seems unlikely. The
lowest frequency parasite that I have heard of in a 3-500 was c. 95MHz.
R L MEASURES, AG6K. 805-386-3734
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