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Re: [Amps] Tuned input design / measurement questions

To: amps@contesting.com
Subject: Re: [Amps] Tuned input design / measurement questions
From: Vic K2VCO <k2vco.vic@gmail.com>
Date: Tue, 16 Apr 2013 14:02:34 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>
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@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/

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