[Amps] PL network adjustment

[R.Measures]

On Aug 23, 2004, at 11:52 AM, Luca wrote:

> Hi All
>
> I have used  on some hf amplifier that I homebrewed,  the Pi network 
> and l did not have  the problem with adjustment maintaining C1 and C2 
> fixed at the table value.
> I think to find the resonance with dip meter and moving L contact 
> point , I am doing right thing . Is it correct?
>
> Now i would like to build the power amplifier using the PL network , I 
> have the table and formulas but l don' t know the correct procedure of 
> adjustaiment .Is the same thing like the Pi network adjustment ?
>
Virgilio - - A Pi network is not like a parallel resonant L-C tank 
circuit, it is two L-networks in series,  Thus, it is not resonant at 
the operating frequency.  Instead, itt is typically resonant c. 10% 
lower in freq.  My guess is that a Pi-L is fairly similar. except that 
it is  three L-networks in series.

>  And to find the L2 contact point: Can I  read the maximum power 
> output ? Or are there any other methods?

--  The amount of L1 and L2 are determined mathematically, not 
experimentally, based on Q, RL, and freq.
ciao
>
> Many thanks in advance,  Luca    ik5tsw at virgilio.it
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Richard L. Measures, AG6K, 805.386.3734.  www.somis.org