>Anyway, in optimizing the L for the output pi-net what are the recommended
>methods?
HI Lane,
Here's how I would do it:
First of all calculate the "ideal" (theoretical) tank component values
based on the tube's optimum load impedance and 50 Ohms and an appropriate
Q. The load impedance (am I using the right term?) of the tube can be
calculated using : Vplate/(Iplate*1.6) -> I believe 1.6 is the right
"fudge" factor. Someone correct me if that's not right I forget the
exact number.
I would make up a tank coil based on those calculated inducatances. Then
I would assemble everything into the amp. With the tube in socket (not
powered mind you) I would connect a resistor of a value equal to the load
impedance calculated above from the anode to ground.
Then I would take my MFJ-259 attach it to the tank output and measure
away. If tuned properly the tank will look like a "perfect" 50 Ohm
match. Adjust caps and tank coil for optimum matching.
This is the way I would do it. Others may have a better way.
GL es 73,
Jon
KE9NA
--------------------------------------------------------------------------
The Second Amendment is NOT about duck hunting!
Jon Ogden
jono@enteract.com
www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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