I use the same amp with my K3S. Just connect from the "Key Out" jack to the "STBY" jack on the amp. I get very good audio reports. Forget the "ALC".

Bill, AA4R

-----Original Message----- From: John Shadle
Sent: Monday, March 28, 2016 4:51 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] [K3] Tokyo Hy-Power HL-1.2KFX amp interfacing (to ALC ornot to ALC?)

I'm considering adding a THP HL-1.2KFX solid state amp to the K3S station I
have, and was wondering how others have done this. There seems to be
conflicting info on the "right way" to do things.

1. The THP manual states that ALC should be used to control the amp, but
2. Elecraft support (and documents) suggest that ALC should not be used for
any amps.

Of course, that begs the question "Why is ALC included at all on the
K3/K3S?", but...anyway.

Elecraft support suggested I ask the reflector what other folks do, so I
am. Looking forward to your replies.

Thanks!
-john NE4U
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