SWL with my Flex 6300

W7CHW

Ken Hansen

To clarify, is this an issue on any frequency above 7.300 MHz, or only outside the amateur bands?

W7CHW

Craig Williams

Don't see that with my 6400 and V2.5.1.

Burch - K4QXX

Steve K9ZW

W7CHW

Doug Hall

Look at the preamp setting just before you go out of the ham band. Then look at the preamp setting just after you "cross the line" to outside the ham band. Did it change?
73,
Doug K4DSP

Greg N8GD

I have a 6300 here, and I don't see this behavior as you described at all.  I even kicked in the RF Gain (under the ANT tab on the left hand fly out panel) thinking it might affect things as I tuned past the band edges but saw no difference there.  The RF Gain did increase the noise floor about 3 db or so when it was engaged, but did not change when tuning past band edges.

N8AUM

Do you have Sig gen ?

Greg N8GD

OK.  I just found something.  If I have the ATU disengaged (off, or greyed out), I do not see the behavior you describe, but, if you engage the ATU (button is blue), as you tune outside the ham band, the ATU will disengage.  If your antenna is non-resonant and needs the ATU to be engaged for good SWR within the amateur band, even for good receive performance, it will not have the advantage of being tuned once you leave the ham band.  I would guess that an external tuner would resolve that issue.  I personally do not see the change in noise floor when the ATU disengages here, but my antenna is most likely different than yours.

W7CHW

No I do not. What is your suggestion if I did?

Stan VA7NF

W7CHW