[AMPS] Tuning a Pi-L tank circuit

[measures]

>
>Hello all
>
>I'm constructing a new HF amp. which has 2 roller-coaster coils
>and 2 vacuum variables in a Pi-L configuration - in other words 
>4 things to adjust every time I change band !
>I could have used a band-switch and tapped coils, but
>happened to have these (heavy-duty) variable components available,
>with turns-counting dials on each.
>
>I've suddenly realised that I won't know how to tune this new amp. up,
>once it's completed.
>
Make a graph of C1 vs. turns counter indication.  Calculate the number of 
turns for a Q of 10 or so on each band and mark. Calculate the inductance 
required for each band.  Measure L1 vs. turns counter reading.  Measure 
L2 vs. turns counter reading.  Make a tuning chart for each band.  Record 
C-load settings.   //   my Web site has some info and explaining on 
what's needed.  

>Help !
>
cheers, Chris

-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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