>
>> >Something puzzles me here. If the suppressor provided the whole plate
>> >load impedance at the parasitic frequency, then the gain would be
>> >reduced by
>> only
>> >4.3dB by lowering the parallel resistance from 160 to 101 ohms. This
>> >may be enough to just stop the parasitic, but doesn't appear to my
>> >mind to give
>> enough
>> >margin to ensure stability.
>>
? is no parasitic not good enough?
>> Is it quite that simple? The suppressor is part of a *series* circuit
>> from the anode through the blocking cap, connecting wires and tune cap
>> so Rs is the number that counts. In a typical layout, the connecting
>> leads swamp the Ls (and therefore Lp) of the suppressor.
>>
>> Steve
>
>That's right Steve, neither Rich nor Peter are looking at the problem
>correctly.
>
>The effect of the rest of the system is such that LOWER Rp
>increases system Q.
>
... not according to Wes' measurements ...
>It does not guarantee a reduction in gain at all.
>
Less Rp =s less gain. Tom has still not explained why the AL-1500, 8877
amplifier has no parasitic suppressor what-so-ever - even though every
other 8877 amplifier manufacturer (Alpha/Henry/Dentron)used one. // see
Figure 24 on my Web site//
>The lowest Rp suppressor is no suppressor at all and zero Xp.
? not according to Wes.
>The
>best suppressor has the highest Rp and infinite Xp.
? What is "Xp"?
>
>Measures suppressor, if it has lower Rp, is actually closer to NOT
>having a suppressor at all! It will INCREASE VHF Q over a higher
>Rp suppressor.
>
? In the Rauchian World, more VHF resistance increases VHF Q?
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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