Thanks for the assistance. I have a shielded USB cable wrapped in a
toroid connecting the two, and have a powered USB hub to hopefully further
isolate the computer from the radio. This was in response to the rig/pc
connection dropping previously.
I’ll double check the setup and connections.
‘73de K1LDOChris Diederich
On Wed, Nov 20, 2019 at 12:01 PM -0500, "Jim Jennings" <[email protected]> wrote:
The symptoms suggest to me RF getting into a USB cable between computer and
the rig’s CI-V USB port. My cousin had a similar situation with his
FTDX-3000 on 40 and 30M FT8, where the rig would abruptly quit transmitting if
he tried to exceed about 25 watts. The problem was solved by winding some
of the “spare” length of the computer to CAT USB cable on a ferrite toroid
(FT240-43 used in this case). He can now increase to full output power of
the rig (100W) without anything “flinching.” Just a thought.
73,
Jim, W7XZ
From: Christopher Diederich via wsjt-devel
Sent: Wednesday, November 20, 2019 05:01
To: Paul Randall ; WSJT software development ;
[email protected]
Cc: Christopher Diederich
Subject: Re: [wsjt-devel] Fwd: 40 Meter Power USB-D
issue
I will run it into a dummy load to check though.
Thanks for the suggestion.
Chris
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On Wed, Nov 20, 2019 at 7:53 AM -0500, "Christopher
Diederich" <[email protected]>
wrote:
I have not tested with a dummy load. Other
digital modes and phone don’t have the same issue, and SWR is 2.5:1 into OCF
80 meter dipole, which is tuned easily with my LDG.
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On Wed, Nov 20, 2019 at 5:12 AM -0500, "Paul Randall"
<[email protected]>
wrote:
Does it do it when the rig is running into a dummy load?
Sent from my Samsung Galaxy
smartphone.
-------- Original message --------
From: Christopher Diederich via wsjt-devel
<[email protected]>
Date: 20/11/2019 01:59 (GMT+00:00)
To: [email protected],
[email protected]
Cc: Christopher Diederich <[email protected]>
Subject: [wsjt-devel] Fwd: 40 Meter Power USB-D issue
Get Outlook for iOS
From:
Christopher Diederich <[email protected]>
Sent: Tuesday,
November 19, 2019 8:26 PM
To:
[email protected]
Subject: 40 Meter Power USB-D issue
Good evening,
I am experiencing a recent issue that has arisen where my IC-7300 is
transmitting on reduced power on 40 meters using FT8 with WSJT-X.
Other digital modes and phone work fine, and no other bands have the low
power issue. Also, the rig occasionally changes from USB-D to USB when
keying. Any ideas?
IC-7300
Win 10 Pro 64 bit
HRD version 6.7.0.244
WSJT-X version 2.1.0
73
Chris Diederich K1LDO
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