Do you have those waves when you transmit JT65?

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  • Updated 2 years ago
I have noted those waves when I work with WSJT-X and JTDx......Flex 6300, Windows 10 on Gigabytes MB with I7 processor 4940K 4gHz......is it a dirty transmission????  or it is normal?





George, YV5WZ / PY3ZZZ
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YV5WZ

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Posted 2 years ago

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kr4k

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I experience the same on JT-65 and JT-9 - always ensuring there is no over driving the radio.Using WSJT-X software. Not sure where it occurs. Had several local hams look at it, and they say it is clean on the air.
73/gus
(Edited)
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YV5WZ

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Thanks Gus.....same experience here....my locals ham say everything on my signal its clean....good to know Im not the only one curious about this

73 !!  George
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Walt

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Sometimes DAX can cause poor transmission -  I have to stop DAX and then restart it again.
It is a bug that is already on the list.  I think.

I do not show those spurs on my display

Cheers
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Tim - W4TME, Customer Experience Manager

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Official Response
It is very normal.  On transmit, we monitor the low-level RF inside the radio and this is just received noise.  It is not transmitted as only the signal in the final filter is actually transmitted.  Your signal is clean.
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YV5WZ

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Thank you Tim......I already did my 6600 reserve!!! :)  

Best Regards

George, YV5WZ / PY3ZZZ
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WA2SQQ

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Thanks Tim, I just learned something!
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Danny K5CG

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I have a Palstar HF-AUTO and these little spurious peaks show up once in a while during a tuning cycle but they always go away after the antenna is matched.
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YV5WZ

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Thanks Danny....SWR 1.1
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Jim Gilliam

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I noticed the same thing on voice and viewed one of my remotes while transmitting and it was as clean as a whistle. I was transmitting on a 6500 and receiving on a 6500 a hundred or so miles away. I was able to bring up two instances as one was received using Teamviewer, and the other transmitting locally from my computer client.


Jim, K6QE

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Mack McCormick, Elmer

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George,

If you'll notice those images are 70 dBm down and would never go out over the air.

Mack
W4AX
Alpha Team
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Tim - W4TME, Customer Experience Manager

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Even if they were 0 dB down, they are outside of the final TX filter, so they would not be transmitted ;-)