Re: [Elecraft_K3] New K3s + PW-1?

Rob Sherwood

Neither the TR-7 nor the K3 has an ALC overshoot problem.  If the exciter overshoots, a compressor cannot fix that. Rob, NC0B

On Dec 10, 2015, at 11:29 AM, "'Charlie T, K3ICH' pincon@... [Elecraft_K3]" <Elecraft_K3@...> wrote:


Thanks for the prompt reply Wayne.


Could step #2 be done more accurately (quickly) in CW, or must it be in SSB to be correct ??


I remember using a very effective Datong RF processor on my TR-7 to prevent overdrive of a delicate tube amp and no ALC.  The Datong had a SET, or something button that would put out a constant single tone.  You’d just punch that button and set the TR-7’s output to the proper drive, then no matter how you screamed into the mike, you were always safe at any compression point.


73, Charlie k3ICH








From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Thursday, December 10, 2015 12:01 AM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] New K3s + PW-1?



The K3 (and K3S) have an external ALC input that that an amp can use to ramp power down in the event of serious problems such as a sudden change in antenna conditions. This ALC has an intentionally slow rise time to prevent the kind of splatter most amp-rig combinations create on the air due to ALC dynamics.


To meet the requirement of staying just below the external ALC threshold:


1. Set menu entry CONFIG:EXT ALC to OFF. Set CONFIG:PWR SET to PER BAND. 


2. Adjust the K3's power output on each band such that the amp just hits the desired power level on voice peaks. Once all bands have been set up as described, you should rarely have to touch the K3's output level.


3. Set EXT ALC to ON and adjust the voltage so that the amp's ALC output barely "tickles" the K3's ALC input at peak.


When you want to run the K3 barefoot and have the PWR control set the power the same on all bands, just return PWR SET to the NOR setting.






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