[AMPS] Practical PI Nets

[Bob & Linda McGraw K4TAX]

I seem to recall being told to "tune the plate capacitor to the right
side of resonance".  This gave a plate current indication of slightly
off of the true dip in current.  As I recall, this produced a noticeable
increase in efficency.  Hence, the tank was not tuned at resonance but
slightly higher in frequency as the capacitor was reduced in C as it was
turned to the right or clockwise.  

Is this what you guys are speakin of?  This appears opposite of what
Dave indicated.

73
Bob K4TAX



> >Rich,
> >
> >Could you give an approximation to guesstimate the difference in the
> >apparent
> >measured frequency and the operating frequency?
> 
> As I recall, on 80m the difference is typically hundreds of kilohertz,
> with the resonance of the tank being lower than the operating frequency
> where the tank was adjusted.
> 
> > Or what factors determine
> >the difference ?
> >
> The biggest factor is Q.  The higher the Q, the less the difference.
> 
> later, Dave
> 
> -  Rich..., 805.386.3734, www.vcnet.com/measures.
> end
> 
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