Flexradio 6600: Notes On SO2R Failure

Subtitle is “SO2R and FT8 crashes system”

The way it is envisioned to work:

Open two slices on the 6600 and two instances of WSJT-X. Configure the settings so one slice goes to one instance and the other slice goes to the other instance. In operation one would click the Enable Tx button to establish a qso on one of the WSJT-X instances. A user could also click the Enable Tx button on the other instance to establish a second qso. Both instances would take turns in using the transmitter and the two qso’s would be completed in due time.

How it actually works:

Clicking on Enable Tx on the first instance causes a third slice to open for no reason and no transmission is made. Clicking the Enable Tx again to stop the transmission leaves the third slice still open. Clicking Enable Tx again closes the third slice and starts a normal transmission. In other words instead of initiating a normal qso the Enable Tx button toggles a third receiver slice for no reason. This behavior is repeatable each time. The second instance of WSJT-X doesn’t seem to have any issues, only the first instance.

Progress: A workaround was tested using the MultiFlex feature and a second computer. Setting up a second computer with Smartlink and WSJT-X then dialling into the same Flex 6600 works fine. Only problem is it requires a second pc and it requires a second Internet connection and bandwidth usage. And it’s not the way the Flex is supposed to work.

Idea for next troubleshooting effort: In WSJT-X configuration make the radio type Kenwood TS2000 instead of Flex6xxx. This is a suggestion obtained from a YouTube video.

Using Kenwood is not a solution because that radio type does not have a TCP option. No way to connect to the FlexRadio.

Followup June 21, 2020: It’s working now, full SO2R mode, by connecting to the 6600 with two separate computers. This is using a feature called MultiFlex where two connections can be made to the 6600 simultaneously. The single transmitter is first come first serve but as soon as the first connection is done with a qso the second connection has the transmitter available for a qso. Using two computers and the accompanying bandwidth is not what was hoped for but this satisfies the SO2R definition. Now for a contest to test it under stress. Meanwhile the hunt for a single computer solution will continue in the background.

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