[TowerTalk] Icom AH-4 Tuner

[Eric - VE3GSI]

Joe,
I do have one of those tuners, but only use it when mobile or portable. You 
will find in the manual there are lengths of wire 'not' recommended for the 
tuner, normally 1/2 wavelength multiples of desired frequency. Also, do an 
Internet search for random wire antennas, one such link here:

http://www.hamuniverse.com/randomwireantennalengths.html

A good friend of mine also had similar issues with his remote tuner and 
found changing wire lengths helped.  I also sort of remember seeing 
somewhere grounding is important, length of ground is important (keep it 
short) and your might even have to use a current BALUM on the coaxial feed 
point to the tuner.

Good luck,
Eric - VE3GSI


----- Original Message ----- 
From: "jsloss" Sent: Monday, November 21, 2011 6:04 PM
Subject: [TowerTalk] Icom AH-4 Tuner


>A friend of mine is using an AH-4 mounted on roof top mast.  End fed 
>antenna length is 84' and the ground wire from the AH-4 to a ground rod at 
>the base of the mast is 32'.  The AH-4 seems to tune OK on all bands except 
>those frequencies below 3875 and 28500.
>
> Would appreciate comments from those who are familiar with the AH-4.
>
> Thanks,
>
> Joe k7mks