I have noticed at times (particularly during fox hunts) what I can best
describe as a noise hill that usually drifts around in frequency. For a
width of several KHzon the panadapter I see what is shaped like a normal
curve that trails off for many more KHz. In panfall mode I can see a
brightening
I observed it until I changed power supplies
Burt
--- On Wed, 9/8/10, Mike WA8BXN hubb...@hotmail.com wrote:
From: Mike WA8BXN hubb...@hotmail.com
Subject: [Flexradio] Drifting noise hills
To: flexradio@flex-radio.biz
Date: Wednesday, September 8, 2010, 10:40 AM
I have noticed at times
I have noticed exactly the same thing on my FLEX-3000, especially on 6m and
20m.
Ron W5RKN
--
From: Mike WA8BXN hubb...@hotmail.com
Sent: Wednesday, September 08, 2010 9:40 AM
To: flexradio@flex-radio.biz
Subject: [Flexradio] Drifting noise hills
Mike:
That is the signature of a switching power supply.
Your WiFi router? Other wall warts ?
Your desktop computer.
Any laptop computer power supplies.
--- Graham
==
On Wed, Sep 8, 2010 at 9:40 AM, Mike WA8BXN hubb...@hotmail.com wrote:
I have noticed at times (particularly during fox
was almost an 'r.f. wasteland'...until i got some rx directivity
working..
73, good luck, W5XZ, Dan, Longview Texas. !/2 acre lot in Hunters Creek..
--- On Wed, 9/8/10, Mike WA8BXN hubb...@hotmail.com wrote:
From: Mike WA8BXN hubb...@hotmail.com
Subject: [Flexradio] Drifting noise hills
To: flexradio
in the future.
72 73HankK8DD
- Original Message -
From: Mike WA8BXN hubb...@hotmail.com
To: flexradio@flex-radio.biz
Sent: Wednesday, September 08, 2010 10:40 AM
Subject: [Flexradio] Drifting noise hills
I have noticed at times (particularly during fox hunts) what I can best
Hank -
One of the things I have noticed with the 1500 --- when I see birdies on on
the panadapter on a given band, if I increase the preamp gain a step they go
down into the noise. I gave on the acer aspire one netbook and got a Toshiba
crossover (sized betweeen a netbook and notebook) with a
, 2010 10:45 AM
To: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Drifting noise hills
I observed it until I changed power supplies
Burt
--- On Wed, 9/8/10, Mike WA8BXN hubb...@hotmail.com wrote:
Sometimes, when the peak of the curve is in the passband of
the receiver I
can hear a shift
The noise hump that wanders around is usually a switching power supply, and
not necessarily the one powering the radio. Switching wall-wart supplies
are especially bad.
The peak that scans from the left to right on the panadaptor is usually an
Iononsonde probing the ionosphere. In some areas of
Ionosonde. Wow. That's cool. I see it all the time.
From: br...@lloyd.com [mailto:br...@lloyd.com] On Behalf Of Brian Lloyd
Sent: Wednesday, September 08, 2010 11:59 AM
To: Drax Felton
Cc: Burt; flexradio@flex-radio.biz
Subject: Re: [Flexradio] Drifting noise hills
The noise hump
To: flexradio@flex-radio.biz
Sent: Wednesday, September 08, 2010 9:40 AM
Subject: [Flexradio] Drifting noise hills
I have noticed at times (particularly during fox hunts) what I can best
describe as a noise hill that usually drifts around in frequency. For a
width of several KHzon the panadapter I
, September 08, 2010 11:59 AM
To: Drax Felton
Cc: Burt; flexradio@flex-radio.biz
Subject: Re: [Flexradio] Drifting noise hills
The noise hump that wanders around is usually a switching power supply, and
not necessarily the one powering the radio. Switching wall-wart supplies
are especially bad
Of Drax Felton
Sent: Wednesday, September 08, 2010 10:22 AM
To: 'Brian Lloyd'
Cc: 'flexradio@flex-radio.biz'
Subject: Re: [Flexradio] Drifting noise hills
Ionosonde. Wow. That's cool. I see it all the time.
From: br...@lloyd.com [mailto:br...@lloyd.com] On Behalf Of Brian Lloyd
Sent
, LLC.
- Original Message - From: Mike WA8BXN hubb...@hotmail.com
To: flexradio@flex-radio.biz
Sent: Wednesday, September 08, 2010 9:40 AM
Subject: [Flexradio] Drifting noise hills
I have noticed at times (particularly during fox hunts) what I can best
describe as a noise hill that usually
.
73 - Mike WA8BXN
---Original Message---
From: Jim Barber
Date: 9/8/2010 1:27:14 PM
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Drifting noise hills
Variable-frequency motor drives can look like that too. Any industrial
Laundries, food processors
On Wed, Sep 8, 2010 at 10:27 AM, Jim Barber audio...@charter.net wrote:
Variable-frequency motor drives can look like that too. Any industrial
laundries, food processors etc. in the neighborhood?
Of course the neighbor's front-loading washing machine could just as easily
have a noisy VFD,
-Original Message-
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Mike WA8BXN
Sent: Wednesday, September 08, 2010 1:42 PM
To: audio...@charter.net
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Drifting noise hills
To all:
I am several
I also have the 'hills' here.
First thing you need to do is power the radio and computer from a battery
and kill all power to the house.
In an instant you will know if you are the noise source or whether it is
from off site. I found three sources in the shack and killed them. My
noise level
I also see drifting noise hills, but mine got a lot smaller when I put
several ferrites on the feedline near the antenna and near the radio,
and also put them on other cables to the radio. I suspect that ground
loops, especially big ground loops between my shack and antennas, pick
up this sort of
I decided to cut off all power to the house, ran the 1500 on battery, and
used a laptop on its own battery. Still was able to quickly find some of the
hills on the panadaptor.
I am thinking of putting a dummy load where my vertical is at the end of the
feedline and see if I have any hills
On Wed, Sep 8, 2010 at 11:11 AM, George Works wor...@hughes.net wrote:
I also see drifting noise hills, but mine got a lot smaller when I put
several ferrites on the feedline near the antenna and near the radio,
and also put them on other cables to the radio. I suspect that ground
loops,
On Wed, Sep 8, 2010 at 12:54 PM, Mike WA8BXN hubb...@hotmail.com wrote:
I decided to cut off all power to the house, ran the 1500 on battery, and
used a laptop on its own battery. Still was able to quickly find some of
the
hills on the panadaptor.
I am thinking of putting a dummy load where
Thanks, Brian, this is all excellent advice and it's actually what I
did. Yes, my antennas (4) are verticals with about 32 ground radials
each, and yes, there is a grounded cable entry plate with lightning
arresters in the feed-through connectors. I recommend the procedure to
others.
George
On
How about some more possibilities as to source since others are seeing these
things: Could it be some sort of spread spectrum signal that should go
un-noticed in our bands. The one second or so variation rate made me think
of electric fence noise. I doubt its that because I don't think there are
On Wed, Sep 8, 2010 at 1:27 PM, Mike WA8BXN hubb...@hotmail.com wrote:
How about some more possibilities as to source since others are seeing
these
things: Could it be some sort of spread spectrum signal that should go
un-noticed in our bands. The one second or so variation rate made me think
If you really want to see this type of noise switch to the panafall
display. When the power supply was going out on my last general use
computer I was treated to this display.
Steven
--
Sent from my Linux box.
Regards de KC6KGE
Skype flamebait
Gmail flamebait at gmail dot com
: [Flexradio] Drifting noise hills
I have noticed at times (particularly during fox hunts) what I can best
describe as a noise hill that usually drifts around in frequency. For a
width of several KHzon the panadapter I see what is shaped like a normal
curve that trails off for many more KHz. In panfall
Hello Mike,
For over a year, I had a problem with 'noise hills' mostly on 40m. The
peaks were spread approx 60 KHz apart and their amplitude was about 10
to 15 dB above the normal noise floor. They would go away completely
every few days for a couple of hours, but they always came back again.
An update on my noise hills: I put a dummy load at the antenna end of the
coax, and they aren't there any more. There are some other quirks that can
be seen but of a much different nature that are probably switching supply
generated and some internal 1500 artifacts.
Thanks again to all who
Call the power company and have them shut down their generators!
Criticism is something we can avoid easily by saying nothing, doing nothing,
and being nothing-Aristotle
--- On Wed, 9/8/10, Mike WA8BXN hubb...@hotmail.com wrote:
Cc: FlexRadio@flex-radio.biz
Date: Wednesday, September 8,
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