>Good examples here,
>http://www.nd2x.net/base-1.html
>
Adding a small inductor in series with the grid terminating resistor
reduces the input SWR of a grid-driven tetrode at 21 - 28 MHz, however,
the tradeoff is increased VHF instability at the anode-resonance freq. A
better solution is to add an adjustable shunt inductor in parallel with
the grid terminating resistor and tune it to the lowest SWR on the
frequency being used.
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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