[Elecraft] ICOM Remote Antenna Tuner

[Bill Johnson]

John, I have used both MFJ 993 and 998 successfully.  I have 12v for them and send one coax to them.   I don't rely on anything but sending 10 watts via K3, etc., to the tuner and await the OK SWR to reflect on my W2 wattmeter.  I currently only have the 998 in service.  I prefer the 993 as it takes less power to tune.  I am going to sell my 993 as it handles only 300 watts.  I send out 500 so cannot use it.  Hope this helps.

73,
Bill
K9YEQ

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of John Pierce
Sent: Saturday, April 8, 2017 4:22 PM
To: elecraft at mailman.qth.net
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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