[Amps] Tuned input design / measurement questions

[Vic K2VCO]

RF current flows from the cathode to the anode, then to ground through the tank circuit 
(it is blocked from the power supply). Then how does it get back to the cathode?
If there is no tuned input, the driver output tank is in series with this circuit.

What am I missing?

On 4/16/2013 10:15 AM, Peter Voelpel wrote:
> The RF cathode current is anode RF current + grid RF current.
> The return path imho for it is through the input impedance and chassis
> ground, not through the transceiver.
>
> 73
> Peter
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Vic K2VCO
>
> If you don't have a tuned input circuit in the amplifier, then the return
> path for the RF cathode current is through the coax and the transceiver
> output tank. This causes the performance to be dependent on the cable
> length. It also might damage components in the transceiver.
>
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-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/