[AMPS] Re: ALC

measures 2@vc.net
Wed, 2 May 2001 10:02:27 -0700


>I suppose one way to improve matters would be to make the ALC closer to AGC,

My fix is to make the amplifier harder to drive - so that the transceiver 
can't overdrive it.  

>with a fairly high gain, and a voltage delay. The older rigs with 6146s which
>derived ALC from the onset of grid current were a lot worse than a properly
>designed system would be - theyr eally did shut the door too late. 
>However, to
>get it to work well, you would have to design the whole system from a 
>knowledge
>of the gain control characteristics of the exciter in terms of power against
>volts and its phase shift against frequency, and making a 'universal' 
>amplifier
>ALC is probably not on.
>
>Maybe somebody knows how repeatable modern rigs are in their output power/ALC
>voltage characteristics?
>
cheers, Peter

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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