[Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp

[Igor Sokolov]

Darrell,
I have exactly the same setup. Before that I had used K3 and Expert 1K-FA. 
Never used ALC,  just power per band. ALC backward regulating output power 
is the cause of interference.

73, Igor UA9CDC

----- Original Message ----- 
From: "AB2E Darrell" <ab2e at hotmail.com>
To: <elecraft at mailman.qth.net>
Sent: Friday, April 03, 2015 7:34 AM
Subject: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp


> Hello all,
>       I am the proud new owner of a new K3. I am also the proud new owner 
> of an SPE Expert 1.3K-FA solid state amp, and I have a question for the 
> group regarding interfacing the K3 to the amp.
>
> My current setup is using my Icom 756 Pro III with the SPE Expert 1.3K-FA. 
> The recommended setup for Icom was to connect both the Relay and ALC 
> cables between the rig and amp. This is because the software in the amp 
> automatically reduces the power in the rig to the best output level for 
> the amp (on the amp LOW=500W out= 3W drive, MID= 1000W out= 6W drive, HIGH 
> = 1500W out = 9W drive). It works flawlessly. Actually, I could leave the 
> power on the Pro III untouched, and the amp reduces the power accordingly.
>
> My question for the group is, is there a way to allow the K3's output to 
> be controlled by the amp? I see the note on p27 about not using an amp to 
> control the K3's output, but wonder if there is a safe way to do it. For 
> instance, could the K3 be set to say 15W out on all bands via the menu, 
> then allow the amp to control the output via ALC for optimum drive?
>
> Any info and comments appreciated.
> 73 Darrell AB2E
>
>
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