[Amps] No parasitic choke question

[Bill Fuqua]

    This third approach is not practical for several reasons.
1.  The VHF resonance(s) may not be on one frequency. When you tune the 
output or input circuits it may change as well as when you change bands.
2.   Adding such a circuit may only change the VHF resonant frequency by 
simply becoming part of the circuit. .

73
Bill wa4lav


At 11:07 AM 7/28/2010 -0400, you wrote:

>A third approach, which I have not actually tested, is to place a
>series resonant circuit from cathode to ground, resonant at the VHF
>parasitic frequency. It might be desirable to "de-Q" this one with a
>low value resistor to make tuning less critical. As I say, this is
>just an idea which needs some testing. In theory, it should be highly
>effective, but there could be a "gotcha" in there. Worth a try if
>nothing else works.
>
>Questions?
>
>73, Bill W6WRT
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