Preset all four components.
If you don't know the values, let me know...I'll send you
the bands of interest.
Phil, K5PC
>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.
>
> Help !
>
> I've read about 'image impedance', 'loaded Q' etc. but really need
> some suggestions about tune-up procedures. I'm guessing that
> I'll have to 'pre-set' the 'L' network maybe, but really not sure where
> to start. (Tetrode - plate load R = 1900 ohms approx.)
>
> 73 - Merry Xmas !
>
> Chris GM3WOJ/GM7V
> gm3woj@talk21.com
>
>
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>
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