[RFI] USB port closing

[Eddie Edwards]

Hi Martin, 

For my IC-7610 USB connection to my PC I used a printer cable from an old
printer (that's gone now) that has built-in ferrites on each end, and then
it's plugged into a USB extension cable with good shielding that I added a
large #31 clamp on ferrite with a few turns on the computer end.  So there
are ferrites on each end and in the middle of the run from computer to
radio.  

No RFI to any of the radio apps' functions at either end from 100 watts into
my 2 multi-band verticals (located not far from my home) or even from my end
fed inverted L for 160 meters.  My station/home grounding (hopefully) meets
Motorola R56 guidelines for bonding and grounding.  

73, de ed -K0iL
-.-. --.-  -.. .  -.- ----- .. .-.. -.-
Eddie Edwards
PO Box 375
Elkhorn NE 68022-0375
--... ...--  - ---  ..-  --- --  ...-.-
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     This is only a draft.

-----Original Message-----
From: RFI <rfi-bounces+eddieedwards=centurylink.net at contesting.com> On
Behalf Of Steve Dyer via RFI
Sent: Tuesday, August 9, 2022 22:49
To: rfi at contesting.com
Subject: Re: [RFI] USB port closing

Hi Martin,
The IC-7610 group on groups.io is a good place to search for this very
issue. The 7610 does appear to be ultra sensitive to any RF present at the
USB port from some of the posts I've seen.
73,
Steve
W1SRD

On 8/6/2022 3:50, Martin Sole wrote:
> 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 at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi

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