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[AMPS] Practical PI Nets

To: <amps@contesting.com>
Subject: [AMPS] Practical PI Nets
From: w2ge@home.com (Phil Levin W2GE)
Date: Sun, 30 Apr 2000 20:21:08 -0400
Wt8r@aol.com wrote:
> 
> In a message dated 4/30/00 7:18:43 PM Eastern Daylight Time, n2bc@stny.rr.com
> writes:
> 
> >
> >  I do have an Autek RF-1 analyzer.  Would a useful approach be to provide
> the
> >  desired plate load via a resistor, approximate the values of C1 and C2,
> then
> >  adjust L1 and L2 for 50 ohms at the output measured by the RF-1?
> >
> >  Any other real world approaches (sans fancy instruments) ?
> >
> >  THX,  Bill  N2BC
> >
> >
> ------------------------------------------------------------------------------
> --------------------------------------
> 
> Bill,
> 
> I am currently doing the same thing with a Pi-L tank.  I use a carbon
> resistor of the proper value to simulate the anode impedance.  I use a
> capacitance meter to set the proper values of capacitance for Ct & Cload and
> drive the tank output with my MFJ SWR Antenna Analyzer, using the frequency
> meter and SWR bridge to determine the resonant frequency of the tank.

As I have been told, that is not enough power to place through the pi
circuit to get any sort of realistic reading. (That is from the MFJ
analyzer)

Phil W2GE

  Since
> capacitance vaues can be determined very accurately, it is best to set them
> and then adjust the inductors to bring them into comformance.
> 
> Good luck.
> 
> Dave, WT8R
> 
>

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