Flex SWR Sweep for Node Red

Alan · July 2022

I built a Node-Red based flow to scan a range of frequencies.

The Flow will work, stand alone, with any Flex 6000 series radio. The Flow will use Flex Slice (0) as the scan RF Source.

Here is a screenshot of the final scan I did on my G5RV on 20M:

Screen Shot 2022-07-03 at 5.11.54 PM.png

For more information and a link to download the flow, go to the discussion I started on the Ham Radio Node-Red IO group:

https://groups.io/g/nodered-hamradio/message/8203

Alan. WA9WUD

Alan · July 2022

I found a good use for my Flex SWR Sweep Flow.

I have a TX-XL. Here is a "as found" sweep on 40M of my G5RV antenna:

Screen Shot 2022-07-04 at 3.25.17 PM.png

I then "taught" the TG-XL the tune solutions for the higher SWR values. Here is the new SWR Sweep. Note, I forgot to teach the tuner 7.24 MHZ (note, the different "X" scales for each data plot).

Screen Shot 2022-07-04 at 3.33.34 PM.png

And here is the same antenna, with the TG-XL in "Bypass":

Screen Shot 2022-07-04 at 3.53.24 PM.png

My next project is to build a flow to use the same sequencer, but to command the TG-XL to learn the best tune solution, for any antenna, across the band.

Alan. WA9WUD

Mike-VA3MW · July 2022

Thanks Alan for your contributions.

I will have to give this a try!

Alan · July 2022

I finished building the Tuner Genius Sweep (Teach) Node-Red Flow.

For more information, and to download the flow, here is my posing of same to the Ham Radio Node-Red IO Group:

https://groups.io/g/nodered-hamradio/topic/92185105#8219

Here is a screenshot of the Tuner Genius "Learning" the tune solutions for my G5RV antenna, 40M, 10 steps:

Alan. WA9WUD

David Decoons, wo2x · July 2022

I've been tweaking Alan's fine work. Now integrated in Node Red to my Flex Radio and Tuner Genius flows.

I've also been tweaking color scheme to make it more readable with text yellow on black and the SWR bars above the frequency and tuner values. The SWR numbers at bottom were changed to white on black.

The fun with Node Red is you can customize it to your liking!

P.S. - Alan and I like to team up :-)

73 Dave wo2x

Alan · July 2022

Looks good, Dave.

The visual display reveals all aspects of your G5RV antenna characteristics and Tune solutions. The resonate portions of the G5RV are easy to spot.

Also, very easy now, to re-teach the Tuner Genius any Band/Antenna configuration, especially when the seasons change and the antenna characteristics may also change.

Alan. WA9WUD

Flex SWR Sweep for Node Red

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