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" <w...@comcast.net> 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 ; wsjt-devel-ow...@lists.sourceforge.net 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 Get Outlook for iOS On Wed, Nov 20, 2019 at 7:53 AM -0500, "Christopher Diederich" <k1...@yahoo.com> 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. Get Outlook for iOS On Wed, Nov 20, 2019 at 5:12 AM -0500, "Paul Randall" <paulfrand...@hotmail.com> 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 <wsjt-devel@lists.sourceforge.net> Date: 20/11/2019 01:59 (GMT+00:00) To: wsjt-devel@lists.sourceforge.net, wsjt-devel-ow...@lists.sourceforge.net Cc: Christopher Diederich <k1...@yahoo.com> Subject: [wsjt-devel] Fwd: 40 Meter Power USB-D issue Get Outlook for iOS From: Christopher Diederich <k1...@yahoo.com> Sent: Tuesday, November 19, 2019 8:26 PM To: wsjtgr...@yahoogroups.com 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 _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
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