Seems to me there is an easier solution:
1. Connect a SWR analyzer [such as the MFJ-259] across the 50-ohm
terminals of the PI.
2. Connect a NON-inductive potentiometer across the output terminals of
the PI.
3. Adjust the SWR analyzer to the frequency of interest.
4. Vary the potentiometer until the SWR analyzer shows 1:1 match.
5. Remove and measure the value of the potentiometer.
VOILA
Don N8DE
carl seyersdahl wrote:
>
> Here's one for the math guru's out there!!
> given the inductance , input and output capacitances, and knowing at least
> the input impedance, (50 ohms) can the impedance on the output side of a
> pi-network be calculated. I have a set of values that the mfr. used in an
> amp, but would like to know what impedance is being matched!!!
> this has been brought up before about the input impedance of the gla1000
> for building the input ckts. It crossed my mind that it might be possible to
> at least find out what the mfrs. had in mind and that might help me in my
> quest . I will likely end up doing it the hard way, which of course is
> mostly just time consuming, but any little bit of info will still help.!!
> thanks to all who answer!!!
> carl / kz5ca
>
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