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WSJT-X Frequency readout jumps


 

When working FT8, the frequency readout in WSJT-X will jump all over the place while transmitting. The radio is unaffected and remains on frequency and FLDigi is usually unaffected. However on occasion it will close abruptly. Radio - Icom IC-706MKIIG, Antenna 80M EFHW, Computer PI-4. Any ideas?
Paul AC7UT


 

RFI or common mode current. Confirm by using a dummy load. If problem disappears, it's confirmed and should be addressed.


On Thu, Dec 19, 2024, 14:36 Paul via <c7ranch=[email protected]> wrote:
When working FT8, the frequency readout in WSJT-X will jump all over the place while transmitting. The radio is unaffected and remains on frequency and FLDigi is usually unaffected. However on occasion it will close abruptly. Radio - Icom IC-706MKIIG, Antenna 80M EFHW, Computer PI-4. Any ideas?
Paul AC7UT


 

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What I found, I recently did the 73 Linux update. That is when the problem started. After attaching a dummy load to troubleshoot, I noticed that the output of my radio reset to high (100%). I normally run at 60% and sometimes 80%. Once I reset to 60% the problem disappeared. The only thing I could figure is that either somewhere in the 73 Linux update a cat-v signal was sent to output high power or it was a fluke thing on one of the power ups that reset the power output. All is working well now.

Thank for the input

Paul AC7UT


On 12/19/2024 1:09 PM, Brian Dale via groups.io wrote:

RFI or common mode current. Confirm by using a dummy load. If problem disappears, it's confirmed and should be addressed.

On Thu, Dec 19, 2024, 14:36 Paul via <c7ranch=[email protected]> wrote:
When working FT8, the frequency readout in WSJT-X will jump all over the place while transmitting. The radio is unaffected and remains on frequency and FLDigi is usually unaffected. However on occasion it will close abruptly. Radio - Icom IC-706MKIIG, Antenna 80M EFHW, Computer PI-4. Any ideas?
Paul AC7UT