[Elecraft] ICOM Remote Antenna Tuner

Barry k3ndm at comcast.net
Sat Apr 8 23:00:29 EDT 2017


Yes, that is correct. Just feed it some RF and if the SWR is above 
1.5:1, if memory serves, it starts to find a solution that yields a low 
SWR.

73,
Barry
K3NDM

------ Original Message ------
From: "Harry Yingst via Elecraft" <elecraft at mailman.qth.net>
To: "John Pierce" <ja-pierce at verizon.net>; "elecraft at mailman.qth.net" 
<elecraft at mailman.qth.net>
Sent: 4/8/2017 7:30:50 PM
Subject: Re: [Elecraft] ICOM Remote Antenna Tuner

>I used to run the SGC-230 tuner at the base of my antenna.
>
>As I recall it has a auto mode that does not require a tuning circuit
>
>
>
>
>
>
>       From: John Pierce <ja-pierce at verizon.net>
>  To: elecraft at mailman.qth.net
>  Sent: Saturday, April 8, 2017 5:24 PM
>  Subject: [Elecraft] ICOM Remote Antenna Tuner
>
>I am looking at remote antenna tuners.  I have seen several controllers 
>for
>the ICOM AH-4 tuner.  My questions are about operation with a K3s.
>1.    Is there a limit to the time that 10w of RF can be sent to the 
>AH-4
>via the K3s Tune button?
>2.    All circuits specify a momentary switch, but does momentary mean
>0.1sec, 1.0sec or 5seconds? Does the time matter?
>3.    When the complete signal returns from the AH-4 should the Tune RF 
>or
>the momentary be terminated immediately?
>4.    Is there a combination of momentary or Tune RF that will damage 
>the
>AH-4?
>
>I have an AH-4 which worked with a home built controller for some 
>months,
>and then became operationally intermittent and final fails to work at 
>all.
>That makes me gun-shy, about buying another even though the AH-4 gets
>excellent reviews on eHam, almost all of which are based on an ICOM rig
>control.
>
>John, AD2F
>
>
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