[Elecraft] ALC and the K3

[Bob McGraw K4TAX]

As a rule ALC is not needed and is not recommended by Elecraft. The K3 
power management system with the internal ALC is far superior to the 
derived voltage from most all amps.   And, unlike many radios which when 
operated with reduced power, they do have a propensity to overshoot, the 
K3 series has firm ALC control at all power levels.

Just tune and load the amp for maximum output and then reduce drive 
power from the K3 to attain the level of power you desire to operate.  
And as a note, after tuning and loading to maximum output, do not 
re-tweak the controls for or at the lower power operation.  This is a 
common misunderstanding among hams.  If it is linear at 1500 watts, then 
reducing drive, it will be linear at 500 watts.  If one re-tweaks at 
lower power it most likely won't be linear at 1500 watts or any lesser 
peak there of.  It will more likely be a "splatter generator".

73

Bob, K4TAX


On 12/21/2017 11:45 AM, Dave Cole (NK7Z) wrote:
> I want to run ALC for my amp if for no other reason to protect the amp 
> from overpower events.  I understand Elecraft does not recommend the 
> use of ALC...
>
> Exactly why is that?
>