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Re: [Amps] Fw: help

Subject: Re: [Amps] Fw: help
From: Jim Brown <>
Date: Sat, 22 Oct 2022 11:53:45 -0700
List-post: <>
On 10/22/2022 11:33 AM, MU 4CX250B wrote:
ALC/AGC circuitry in linear amplifiers was primarily used in the days
of vacuum tube, transceivers, which did not have a power output
control. With your station, there’s no need to use the ALC.   Just
don’t connect the cables and you’ll be fine. Your ICOM transceiver has
a power output control, so just turn the power down so you don’t
overdrive the L4B or L7.

Right. More important, use of ALC between amp and exciter to control power is a recipe for clicks and splatter.

OTOH, that ALC is a good thing IF power is controlled by drive level from the exciter, to protect the output stage from a failure in the antenna system, including antenna switching. Like transmitting into the wrong antenna. :)

73, Jim K9YC

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