[Amps] Pi-L Check

[Ian White G3SEK]

wc6w at juno.com wrote:
>
>Good evening to the group,
>
> I've cobbled together a Quick Basic Pi-L program that calculates the 
>coils at the nominal output impedance (52 ohms) and at the high end of 
>the wider bands.
>
> It then recalculates the C's, the effective Q and the midpoint Z at 
>higher (100 ohm) and lower (25 ohm) load impedances and at the band 
>edges to allow for real world margins.  The L's remain fixed during 
>this second pass.
>
> Unfortunately, I "lost" my older "standard" version Pi-L program in a 
>Gatesian event a couple years back.
>
> Does anyone have a (modern verison) Pi-L program handy who could 
>provide some check L & C values?
>
> A single point should suffice... say:
>     2000 ohm input
>     300 ohm mid-point
>     52 ohm output
>     at 4 MHz
>     Q = 10
>
>73 & Thanks!
>  Marv WC6W

There is an Excel spreadsheet on my website, which does both Pi and Pi-L 
output networks (but not input networks).

It can also include stray L and C, and a parasitic suppressor if you 
wish; but you can set all those values to zero for cross-checking.


-- 
73 from Ian G3SEK         'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek