>
>Steve says:
>
>>The suppressor works in series from the anode to the tank circuit, so it's
the
>
>>series equivalent that's most useful in visualising what is going on.
>
>Especially when you remember that if the anode circuit parasitic resonance is
>lower in frequency than the grid circuit parasitic resonance, the thing won't
>oscillate anyway.
>
semi-agreed
>
>For what it's worth, my feeling is that the series inductance lowers the main
>parasitic frequency of the anode circuit below that of the grid circuit. By
>reducing the Q of the parasitic circuit, the amount of loading needed is
>reduced., because the gain at the parasitic frequency is reduced.
>
This is not borne out in practice. Anode-resonance frequency is not
changed much when the suppressor is shorted out.
>I have not yet seen any analysis which shows why the XL of the suppressor
>should be designed to equal the shunt resistance of the suppressor at any
particular
>freqeuncy.
>
The goal is to introduce a staggered resonance, sans ethanol. The
resistance, R-supp, forms a lower inductance resonance. L-supp forms a
higher inductance circuit with a slightly lower resonance. The net
result is broadbanding that is quite similar to stagger tuning IF
transformers. .
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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