[Icom] Icom AH4 Quit on me

Fri, 18 Oct 2002 04:23:13 -0400 (EDT)

Hi all,

Actually cleaning the contacts on the relays is not that easy...
After my AH4 started to not tune the lower bands I tried locating
a faulty relay or dirty contacts. It was impossible removing
the relay cover without damaging the relay or the PCB. Apparently
the relays are soldered on the board too bloody close.
In my case it turned out that the coax or the ground were damaged
and the tuner worked fine with a test random wire I installed.
I'm now in the process of building a vertical loop to use with
the AH-4.

73
Demetre - SV1ENS

> Hi Brian
> 
> I have a AH4, and used it with a 41 mtr LW, I had exactly the same
> problems as you after 2 - 3 month.
> The cure is to clean the contacts in the relays in the AH4.
> 
> Then it will work flowlesly again
> 
> Vy 73  Per OZ1EQC
> 
> IC-7400(IC-746Pro), IC-4KL 1 Kw QSK
> Antenna:  SOMMER XP-808 - up 65 Feet
> Log: Log Windows 4.03
> Member of: EDR, ARRL, HSC
> [email protected]
> www.oz1eqc.dk
> 
> ----- Original Message -----
> From: "Brian Carling" <[email protected]>
> To: <[email protected]>
> Sent: Thursday, October 17, 2002 12:30 PM
> Subject: Re: [Icom] Icom AH4 Quit on me
> 
> 
>> Does anyone know if there is a fuse in the AH4?
>> 
>> Any other idea what could cause it to suddenly quit?
>> 
>> On 17 Oct 2002 at 5:52, Brian Carling wrote:
>> 
>>> Hmmmmm, seems odd though that it worked OK for several weeks on
>>> two different antennas with the length of coax I am using!
>>> 
>>> It makes no sense to have to put the tuner that close to my
>>> shack.
>>> 
>>> On 16 Oct 2002 at 19:23, Van van Bergen wrote:
>>> 
>>>> Brian,
>>>> I had the same problem and found out the AH4 wanted the length
>>>> of coax that came with it 16' 4" for it to work with the 706 I
>>>> had it working with. I had a  shorter piece of coax as I did
>>>> not need the length to reach between the rig and the tuner. It
>>>> would start to tune and then shut down ( 706 would quit tuning
>>>> mode).
>>>> 
>>>> Hope this helps.
>>>> 
>>>> 73
>>>> Van
>>>> WD6FGB
>>>> 
>>>> ----
>>>> Your Moderator: Dick Flanagan W6OLD, [email protected]
>>>> Icom Users Net: Sundays, 1700Z, 14.315 MHz Icom FAQ:
>>>> http://www.qsl.net/icom/
>>> 
>>> 
>>> ----
>>> Your Moderator: Dick Flanagan W6OLD, [email protected]
>>> Icom Users Net: Sundays, 1700Z, 14.315 MHz
>>> Icom FAQ: http://www.qsl.net/icom/
>> 
>> 
>> ----
>> Your Moderator: Dick Flanagan W6OLD, [email protected]
>> Icom Users Net: Sundays, 1700Z, 14.315 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> 
> 
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/

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