8000DLE internal noise - (switcher?)

N7CXI
Posts: 14
Joined: Sun Apr 09, 2017 5:20 pm

8000DLE internal noise - (switcher?)

Postby N7CXI » Sun Jan 27, 2019 3:09 am

Greetings, all.

I was tuning around 2.068 mHz earlier today, and saw a big, nasty noise spike that I decided to pursue.
Once I switched the rig into a dummy load it looked like the noise was being generated by the rig itself...?
I then fired up a small portable I keep for such things and verified that the noise is indeed coming from the 8000.
(only the radio and analog PSU powered and the noise is present. Kill power to the radio and the noise goes away)

I've since found there are quite a number of strong noise spikes coming from the 8000 up and down the HF spectrum.
Has anyone else noticed this and if so, is there a fix?

Thanks,
Jim N7CXI
N7CXI
Posts: 14
Joined: Sun Apr 09, 2017 5:20 pm

Re: 8000DLE internal noise - (switcher?)

Postby N7CXI » Sun Jan 27, 2019 3:42 am

Now that Scott was kind enough to move my post into the correct section, I can see that my 8000 is not alone in having this
issue.

In my case, at least the spikes are outside the amateur bands with the exception of a minor one at 14.031 . (thereabouts, it slides around)
However:- the whopper at ~2068 kHz averages -84dBm! that isn't by definition a "little" spike.

My .02 of course.

Jim N7CXI
User avatar
w9ac
Posts: 55
Joined: Sun Apr 09, 2017 4:01 pm

Re: 8000DLE internal noise - (switcher?)

Postby w9ac » Mon Apr 22, 2019 7:18 pm

N7CXI wrote:Now that Scott was kind enough to move my post into the correct section, I can see that my 8000 is not alone in having this
issue.

In my case, at least the spikes are outside the amateur bands with the exception of a minor one at 14.031 . (thereabouts, it slides around)
However:- the whopper at ~2068 kHz averages -84dBm! that isn't by definition a "little" spike.

My .02 of course.

Jim N7CXI

Jim,

Tune to 413 kHz in the LW band. There you will likely find the strong fundamental. 2068 kHz is the fifth harmonic of 413 kHz.

Paul, W9AC

Return to “Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.”