> Using the term resonance can be misleading. The pi network is
No it isn't, unless like Rich you don't use the term in a conventional
manner.
The pi-network matched system IS resonant when the network is
properly adjusted. Resonance is defined (except in certain areas of
California) as the point where voltage and current are in phase.
What Rich likes to do, INCORRECTLY, is to remove the source
and load impedances and then measure resonance.
> operating as an impedance transform from what the antenna presents to
> what the plate wants to see. This doesn't rely on resonance in the
> network. The dip occurs when the anode load impedance goes purely
> resistive. As you move away from that, the resisitive part of the load
> gets smaller and there's reactive current as well, so the anode
> current increases.
What really happens is the impedance of the tank reaches a
maximum at resonance. At any point off resonance, the impedance
is reactive and LOWER than the resonant impedance.
> Messing around with a Smith chart program such as MIMP is an excellent
> way to get a feel for it.
>
> Steve
>
>
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>
73, Tom W8JI
W8JI@contesting.com
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FAQ on WWW: http://www.contesting.com/FAQ/amps
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