[Icom] ICOM 756 PRO2 - NO RX

[David J. Ring, Jr.]

Several weeks ago I asked for some help for a friend who had an IC-756PRO2
that didn't work.  I got several replies from some that suggested various
things to check.

The radio would only respond to VERY loud broadcast stations.  (Actually
WWVH when he was in Hawaii...)

I got a message back from the man on the ship:

----- Original Message -----
Sent: Friday, August 08, 2003 12:27 PM
Subject: Personal: Icom Completed ....


Guys,
just got an e-mail back from Icom:

Quote

Jim
   The front end of your radio received a very strong RF overload.  Had to
replace several components at the Controller and RF units.  Please eliminate
this RF source before using the radio again.

   We are ready to return ship the radio.  Please contact
xxxxxxxxxxxxxxxxxxxxx with the address you want it returned to.  Tag#
xxxxxx.

Dan Miles
Icom America
Service Supervisor

Unquote


Dave,
what do you think ? Highest power rig on the ship is a RAY-152 HF tranceiver
that runs Globe E-mail system, don't think it's more than 150W, any info
available on this problem in the field. By the way we have at least 2 other
HF receievers running all the time, a Furuno HF tranceiver and the DSC watch
receiver both of which must be picking up about the same amount of rf. Can't
put a filter in the front end since the problem emitter is in the 2-30 Mhz
range.

So, anything you can come up with will be appreciated.

73's
Jim
=======================================

Any suggestions?

I told him to look and see what his dipole "sees" RF wise.

In addition to what Jim says above, the ship has X band and S band radars -
20 to 50 kW peak pulse (small duration) probably is what I remember from my
shipping days.   Is that what's blowing the RF front end?  They also have a
very low frequency depth sounder, and several satellite transcievers, and a
20 watt VHF radio.

DSC in the above means "digital selective calling".

Any help would be appreciated.

73

David Ring, N1EA