[Icom] IC765 Tuner problem

Tue, 17 Dec 2002 11:21:29 -0800

Hi Fabio,

Have you checked tuner operation on all bands, using a 50 ohm resistive
dummy load?

It is also possible that the reflectometer in the ATU is out of alignment.
The ATU alignment procedure is on pages 6-16 and 6-17 of the IC-765 service
manual.

You can download the service manual here:

http://80.162.141.166/mods.dk/manuals/icom/IC-765_Service_manual.pdf

There is some valuable IC-765 information, including the W2ISB Passband
Tuning mod, here:

http://www.qsl.net/ab4oj/download/ic765.zip

Best 73,
Adam, VA7OJ/AB4OJ
North Vancouver, BC, Canada
http://www.qsl.net/ab4oj/
Icom FAQ site:
http://www.qsl.net/icom/

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Fabio Roccatagliata
Sent: Tuesday, December 17, 2002 09:37
To: [email protected]
Subject: [Icom] IC765 Tuner problem

Hello everybody,

I've just bought an IC765.
All is ok except for a little problem.
On 10Mhz band I have to tune 250khz under my TX frequency in order to get
a 1:1 SWR.
If I tune on 10105, for example, SWR goes to 1.5 and the tuner try to tune
again everytime I transmit.
Checking SWR between 10100-10350khz I noticed that my 765 tuned on 10305
trying to tune on 10105 !

So I tuned my radio on 9855khz and get 1:1 between 10100 and 10110.

The antenna tuner works great everywhere except on this band.
What can be wrong ?

My antenna works on 10Mhz and SWR is 1.8.... not very high.

Any suggestion ?

Thanks,
73
Fabio
IZ1EGT

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