[Elecraft] AH-4 Tuner

[Richard Lim]

Hi Tom, the solution is even easier than that.

All you need to do is provide 12v to the AH4 (red wire) and short the 
control wire (white) to ground. The green wire provides indication that 
Tuning is in progress and the Black wire is ground. That's it. Seems to 
work very well for me. I have a gif of the schematic from  5B4AEZ which 
I got off the internet if anyone is interested.

Rich
____________________________
72/73 DE KQ9L K1 #1669, K2 #3232
KX1 #21, FIST 10193,  FP 548,
QRP ARCI 11129 ARS #1565
QRP-L #2552


On Sep 5, 2004, at 10:43 AM, Tom Arntzen wrote:

> I think icom rigs has an output to the tuner that has a special 
> voltage for
> each band. E.g one value for each.
> I think it should be possible if you had an interface that recognice 
> K2 band
> and set that voltage output to the tuner.
> I think I saw the schematics in ARRL handbook some years ago. (or was 
> it a
> designe to decode value into auto antennaswitch?)
> And you need tune button.
>
> Also I think this could be done manually , but easy to forget to switch
> bands.
> Bottom line...The tuner needs to know witch band it is tuning.
>
> Someone out there may have the values or you could meassure your own 
> icom
> rig to find right value to right band and design a circuit.
> But look through ARRL handbook.
>
> If you solve this , let us know.
>
> Tom LA1PHA
>
> ----- Original Message -----
> From: "Philip Westover" <philathillview at worldnet.att.net>
> To: <elecraft at mailman.qth.net>
> Sent: Sunday, September 05, 2004 4:38 PM
> Subject: [Elecraft] AH-4 Tuner
>
>
>> Howdy!
>>
>> I was hoping there might be an Icom AH-4 Antenna Tuner
>> expert out there who maybe knows a good way to remote the
>> tuner with a non-Icom rig, such as a K2.  (If you are
>> familiar with the
>> AH-4, it has a 4-conductor control wire system that
>> integrates it nicely with most newer Icom rigs, and works
>> well with end-fed antennas.)
>>
>> I've had my AH-4 around for awhile, mainly for a field setup
>> I've been using
>> (one of those newer Icom rigs), but I now have improved my
>> home station's
>> random wire antenna, and I'd like to try out the AH-4 on it,
>> with several other non-Icom rigs, including the K2.
>>
>> Has someone done this, or can someone think of a way to do
>> it?
>>
>> 73,
>> Phil, WA7URV
>>
>>
>>
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