Hi Carl
Have you tried Ian's spread sheet?? It's the most versatile one I've used.
It allows for input of tube Cout and Cmin of the tune cap separately. Also
accounts for the tube to tune cap lead inductance, (intentional or not). It
also accounts for the parasitic suppressors effect on tank parameters. It
will allow tank input impedance values down to 1 ohm above output
impedance, (51 > 50 etc.) Find it here,
http://www.ifwtech.co.uk/g3sek/
73, Paul
PAUL HEWITT
WD7S PRODUCTIONS
QRO HOMEBREW COMPONENTS
http://wd7s.home.att.net
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
> Behalf Of carl seyersdahl
> Sent: Friday, October 31, 2003 5:19 PM
> To: Amps@contesting.com
> Subject: [Amps] pi-net programs
>
>
> I have been using the "Elmer wingfield " pi-net program in an attempt to
> find some answers to some problems. I have compared the results of that
> program and the info in the '97 arrl handbook and they do not compare at
> all.
> ( the ckts are for the output pi-net for tubes.) according to the info in
> the book, the plate impedance of four EL509's in parallel seems
> to be in the
> area of 600 ohms , due to the low plate v. and the hi current. (at least
> that's the way I see it.) The handbook starts at 1500..!!!
> Are there any other programs like Wingfield's that might be different or
> better?? Inquiring mind.!!!!
> carl / kz5ca
>
>
>
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