Wow, getting good reception tonight on my 7600GR up here in Toronto, the
usual fading in and out of some stations is gone, nothing but clear
signal. I pretty new to this, does this have to do with the weather?
Clouds or no clouds? Its pretty cloudy tonight here.

Yep!
real clear tonight;




In article , "@(none)"
""richard\"@(none)" writes:


Wow, getting good reception tonight on my 7600GR up here in Toronto, the
usual fading in and out of some stations is gone, nothing but clear
signal. I pretty new to this, does this have to do with the weather?
Clouds or no clouds? Its pretty cloudy tonight here.

Reception is better tonite. It has nothing to do with weather or clouds but
with the ionization of the upper atmosphere by energy from the sun. The
sun's output changes all the time with solar flares, etc. This has a direct
bearing on the reception conditions. You can get numerical information on
solar activity daily as use it to calculate key reception parameters such as
MUF and LUF. Reception is also typically better in th evenings when the sun
goes down as the ionsphere layers near the earth collapse into one larger
layer higher up, allowing the radio waves to 'bounce' farther around the
curvature of the earth. See
http://hfradio.org/propagation_page2.html#general and
http://dx.qsl.net/propagation/propagation.html

--
Brian Denley
http://home.comcast.net/~b.denley/index.html

"@(none)" ""richard\"@(none)" wrote in message
...
Wow, getting good reception tonight on my 7600GR up here in Toronto, the
usual fading in and out of some stations is gone, nothing but clear
signal. I pretty new to this, does this have to do with the weather?
Clouds or no clouds? Its pretty cloudy tonight here.

"@(none)" ""richard\"@(none)" wrote in message ...
Wow, getting good reception tonight on my 7600GR up here in Toronto, the
usual fading in and out of some stations is gone, nothing but clear
signal. I pretty new to this, does this have to do with the weather?
Clouds or no clouds? Its pretty cloudy tonight here.

Nope. The wx has no real effect on HF or MW skywave. Very little on
ground wave for that matter except for maybe local quirks on the upper
HF bands. Wx does effect the VHF and UHF bands quite a bit with
ducting and the like. If you ever watch DX TV, or FM radio, this is
usually tropo ducting. Can happen any time of year, but spring and
summer usually the best. Not related to sporadic E, which is sky wave
off the ionosphere...You see E skip on 28-50 mhz a lot. Many six meter
openings are E. Many are also F layer too though in good band cdx...
MK

"Mark Keith" wrote in message
om...
"@(none)" ""richard\"@(none)" wrote in message
...
Wow, getting good reception tonight on my 7600GR up here in Toronto, the
usual fading in and out of some stations is gone, nothing but clear
signal. I pretty new to this, does this have to do with the weather?
Clouds or no clouds? Its pretty cloudy tonight here.

Nope. The wx has no real effect on HF or MW skywave. Very little on
ground wave for that matter except for maybe local quirks on the upper
HF bands. Wx does effect the VHF and UHF bands quite a bit with
ducting and the like. If you ever watch DX TV, or FM radio, this is
usually tropo ducting. Can happen any time of year, but spring and
summer usually the best. Not related to sporadic E, which is sky wave
off the ionosphere...You see E skip on 28-50 mhz a lot. Many six meter
openings are E. Many are also F layer too though in good band cdx...
MK

I've had weather (particularly cold, snowy weather) affect groundwave
greatly... especially on the lower end of the AM band. I've managed to
receive what was KFXD (580 Boise/Nampa/Caldwell, ID (towers in Boise) on my
car radio in broad daylight in Astoria, Oregon during a heavy snowstorm that
stretched from the Oregon coast to the Rocky Mountains.. this was a near
local signal level.. During the same conditions several years later, I was
able to receive, on the inside of a concrete building, on a GE SRII, what
was then KGW (620 Portland) at Dworshak Reservoir near Orofino, ID..

Mark Keith wrote:

Nope. The wx has no real effect on HF or MW skywave. Very little on
ground wave for that matter except for maybe local quirks on the upper
HF bands.

That's what I thought too, but there is some growing evidence relating
the formation of sporadic E-layers and local weather, perhaps large
thunder storms.

Here are two websites on the subject:

http://www.amfmdx.net/propagation/Es.html (see 3.3 in the text)
http://www.anarc.org/naswa/issues/0796/tech0796.html


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starman wrote:

Mark Keith wrote:

Nope. The wx has no real effect on HF or MW skywave. Very little on
ground wave for that matter except for maybe local quirks on the upper
HF bands.

That's what I thought too, but there is some growing evidence relating
the formation of sporadic E-layers and local weather, perhaps large
thunder storms.

Here are two websites on the subject:

http://www.amfmdx.net/propagation/Es.html (see 3.3 in the text)
http://www.anarc.org/naswa/issues/0796/tech0796.html

The evidence is so slight that it can safely be ignored except in some very
extreme and very short lasting effects.

That is to say that the weather will have very little if any effect upon SW
propagation.

When it comes to VHF frequencies and above it's an entirely different
ballgame.

Steve
Holland, MI
Drake R7, R8 and R8B

"Brenda Ann" wrote:
| I've had weather (particularly cold, snowy weather) affect groundwave
| greatly... especially on the lower end of the AM band. I've managed to
| receive what was KFXD (580 Boise/Nampa/Caldwell, ID (towers in Boise) on
my
| car radio in broad daylight in Astoria, Oregon during a heavy snowstorm
that
| stretched from the Oregon coast to the Rocky Mountains.. this was a near
| local signal level.. During the same conditions several years later, I was
| able to receive, on the inside of a concrete building, on a GE SRII, what
| was then KGW (620 Portland) at Dworshak Reservoir near Orofino, ID..

I've noticed the same effect(s) when listening to MW, especially when the
snow is wet and heavy - possibly some effect on ground conductivity?

Just a thought...

73,

S.L.


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Thanks for the links, Starman. I've saved the articles for later reading.

The following may explain any weather connection to propagation:

http://www.holoscience.com/news/balloon.html

Bill, K5BY