>
>> Seems that issue is not that effective resistivity of nichrome increases
>> with decreasing frequency - I don't think anybody is arguing that. What is
>> evident is that the effective series resistance of the nichrome suppressor
>> is higher than conventional suppressor at low frequencies. From what I can
>> see, this seems to be the basic tradeoff between the nichrome suppressors
>> and the conventional suppressors. If I am recalling the test data
>> correctly, the nichrome suppressor has higher losses at moderate VHF
>> frequencies (50 to 100 MHz) - a good thing, at the expense of higher
>> losses in the HF frequency range (a bad thing). As the frequency increases
>> further the the two suppressors start to converge as the inductive
>> reactance of the nichrome suppressor starts to dominate over the
>> resistance of the wire. No rocket science here.
>
>The AL80B becomes unstable, with no suppressor, at around 180
>MHz or so depending on the tube socket and lead length.
>
>Suppressor operation at 150-200 MHz is all that matters in that
>case.
>
>The Measures' suppressor Wes tested was NOT the suppressor
>Rich sells.
>Wes duplicated the AL-80 suppressor out of nichrome
>and measured it. The actual suppressor Rich sells has lower Rp
>than the stock suppressor.
Here we go again. Rich does not sell parasitic suppressors. He sells
material to build them. // Tom -- does lower Rp mean more VHF gain or
less?
>
>When the "production" nichrome suppressor is installed in the
>anode system, anode system Q increases except at HF and lower
>VHF....where it decreases (and where you don't want it to
>decrease).
zzzzzzz
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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