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

[R.Measures]

On Feb 23, 2005, at 4:11 AM, Dennis12Amplify at aol.com wrote:

>
> In a message dated 2/22/05 3:17:22 PM Central Standard Time,  
> TexasRF at aol.com
> writes:
>
> Anyone  out there willing to give this test procedure a try? I am at 
> work
> right now and no access to a big PA to check this out.
>
> Standing by  for test results!
>
>
> Tom,
>
> I have tried that a few times in the past because I was also looking  
> for
> tuning (or pretuning) shortcuts; and found that the dip meter  
> indicated the
> output tank's resonant frequency to be slightly  lower than the 
> frequency the
> plate current dip was obtained at.

Dennis O.:  I found the same thing, which is what got me thinking about 
how a Pi-network works -- i. e., that it's actually two L-network / 
Z-transformers in series.  However, the confusion is understandable 
since two L-networks in series is similar to a tank circuit in that it 
provides a flywheel effect to augment the non-conduction half of the 
sinewave in other than Class A amplifiers,
cheerz
>
>  Regards,
>
> Dennis O.
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>

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