>>A resistor that has roughly 10nH of L and 1.5pF of C (the ones we use)
>>resonate at 1200 MHz. Does it seem likely that this should be of concern
>>in an HF amplifier?
>
>Did I ever say that? No.
The point was that the Rsup self-resonance is a non-issue.
>Someone questioned the fact that I stated that
>a resistor has a self resonant frequency. I have never claimed that it
>mattered in an HF amplifier. Also, I even stated in once post that the
>resonant frequency of the resistor is probably very high due to the small
>values of the parasitic L and C.
>
indeed
>So I still stand by my point: A resistor has a self resonant frequency.
>That is all I was trying to say.
>
>However, that 10 nH of inductance WILL have an effect on the anode
>circuit in an HF amp. So while the self resonant frequency is not an
>issue for HF, the inductance still is.
>
true - and if the inductance of Rsup is equal to Lsup, the sup. design is
wanting.
-later, Jon
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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