Thanks to everyone who responded to my question. I also researched
answers to this problem on IC7610@groups.io.
So we have tried most things, the recommended Tripp-Lite shielded USB
cable, added #31 clamp ons with 4-5 turns at each end of the cable, a
small wire wrapped around the USB connector metal shell at the radio end
and tied to the radio GND stud. So far nothing has worked and the
station is still plagued with Win4Icom disconnecting after a few
transmit periods. It's become even worse now in that on some occasions
it is not only closing the port but the port can no longer be found in
Device Manager requiring a complete disconnection of the USB cable to
get it to be found again. This is happening with the IC-7610 but more
worryingly it is also happening with an IC-7300 that was previously
trouble free.
As I understand it the station is located inside the house and the
connection to the outside ground is approximately 20 feet. Right now I
can only assume there is a lot of RF inside the station though before
moving things around in the same shack the IC-7300 was working perfectly
for very long periods of time.
Thanks
Martin, HS0ZED
-----Original Message-----
From: RFI [mailto:rfi-bounces+w7rkn.7=gmail.com@contesting.com] On Behalf Of
Martin Sole
Subject: [RFI] USB port closing
Hi,
I'm writing this for a friend. He has an Icom IC-7610 connected to a
laptop running Win4Icom. At anything over about40 watts it doesn't take
many FT8 transmit cycles before Win4Icom will report a connection
error,the error log shows port closed and the author's statement in the
alert box that appears is that this is most likely caused by RFI.
Accordingly, we want to deploy suitable ferrite on the USB cables. My
thinking is that 3 to 4 turns around one of the medium or large type 31
snap on's that DX engineering sells, at each end of the USB cable, would
be a good start.
Is my thinking here sound or are there other things we should try first?
Thanks
Martin HS0ZED
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|