> I haven't really analyzed this problem carefully, but I always find it
> helpful to use extremes (as you have) to bracket the problem.
> As you point out, if Rp is lowered to zero, then the Xp is shunted
> completely and the suppressor does nothing. The other extreme,
That's correct.
The lowest Rp suppressor is nothing at all. Q is limited by the external
components.
> very high Rp also leads to the same result as it suggests a
> inductor with inductive reactance Xp in parallel with an infinite Rp
> which is also a high Q case (in this case the VHF resonance will
> be shifted due to the reactance Xp). So I am wondering if you don't
That's correct also.
Optimum is NEVER lowest or highest, it is some value in between.
See:
http://www.w8ji.com/vhf_stability.htm
If you see anything there that needs further expansion or is incorrect,
please let me know.
73 Tom
|