[Amps] Fwd: Pi-L In-circuit Adjustment Question

[R.Measures]

On Feb 23, 2005, at 2:41 PM, TexasRF at aol.com wrote:

>
> In a message dated 2/21/2005 4:47:23 A.M. Central Standard Time, 
> r at somis.org writes
>
>  
>> An L-network transforms E and I by operating near resonance.  The
>>  greater the Z-transformation, the closer it operates to resonance, 
>> the
>>  greater the circulating I in the inductor, the greater the E across 
>> the
>>  capacitor., and the greater the operating Q.  However, an L-network 
>> is
>>  never operated dead-on resonance because there would be ° E and ° I.
>
  -- I typed the infinity character before the E and the I.  What OS are 
you using, Gerald?
>
>   On AMPS, those who joke about AC circuit analysis are destined to
> become one.

??
>  
> Rich,
> This sounds like a truly serious individual. I am too; I like that.
>  
> But, comparing well known and documented AC circuit analysis with flat 
> earth is a little disappointing to those of us who are truly 
> interested in gaining accurate knowledge of the subject under 
> discussion. This does not sound like a serious individual. Why in the 
> world would you take such a shallow position on a serious topic?
>   
> I hope you don't feel threatened in some small way by the direction 
> the discussion has been going.

chortle

> Few of our group (if any) know everything about rf designing so I 
> expect most of us still have a bit to learn, I know I do.

And me too.

> I also know by some of the comments you have made that you can learn 
> as well if you desire to do that. You have a tremendous amount of very 
> useful knowledge to share and can make it even more valuable with 
> little effort.

I have less knowledge than you presume, but, unlike some,  I usually 
know to close my mouth when I'm in over my head.
>  
> Any of the aspects of rf design we discuss should be able to stand the 
> burden of mathematical proof. If it can't, then it is highly suspect. 
> A flat out statement like "no capacitor will resonate a Pi network" is 
> an example of a suspect statement.

I have been thinking about coming up with a 60Hz L-network problem that 
illustrates what goes on when an L-network begins to approach 
resonance.
>  
> ... Won't you reconsider your position on this and help us reason 
> through and understand the true facts of the matter?

Are you ready for the aforementioned problem?
>   
> If not, then ok, but in the future when you offer technical 
> information there will be that "hmmm?", in my mind as well as many 
> others.

This has always been the case.  There are still some denizens here who 
believe that it's absolutely, positively, 100% impossible for a 
VHF-rated tube to oscillate at VHF in a g-g HF amplifier.
-   I received an e-mail from an observer who thinks you are on a 
hunting expedition.
>  
> 73,
> Gerald/K5GW
>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org