[Amps] Fw: help

[Jim Brown]

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