[Elecraft] Strange Interference

[Charlie T, K3ICH]

Glad you found the source.

However, last year I heard some strange "weeblie" signals that swept across
the 10 meter band.  They would typically start up some point and sweep from
low to high in frequency.  They were quite noticeable on the VGA/P3  or the
Flex screen.  They sounded like they were being frequency modulated at a
slow, maybe 10Hz rate over about a 100 Hz span, while the whole signal took
anywhere from a split second to about 10 seconds to travel a few hundred
kilohertz.  The fast ones would leave a trail of dashes, depending on the P3
sweep speed and the slow movement seemed to get a bit faster as it moved.
I'd see a couple every 10 to 20 seconds and they were definitely coming in
the antenna.  The source was not local, because I could switch to an indoor
loop and they were barely readable.

I haven't looked recently since ten has not been too active.  I'll park the
K3 up on ten and check the scope every so often to see if they still show
up.

I DO have a similar RFI type signal coming from my PWM solar charger, but
these weeblies are different.

73, Charlie k3ICH


-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Terry
Sent: Saturday, July 23, 2016 2:44 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Strange Interference

Thanks to all for the advice. I found the issue. It is my Powerwerx SS30DV
Switching supply. I thought this supply was a good one to not create
problems like I am having. Not sure if it is fixable or If I need to send it
in for repair. 

Very 73,

Terry
N7TB