[NCARC] propagation -- interesting echo on HF

[chris at yipyap.com]

I will have to check out the MINIPROP thing.

I don't really understand the sunspot reporting
numbers, A, K, and all of that.  I know more sunspots
is good, less is bad.

I did find a good program that shows the greyline, which
I believe was involved with what I experienced.

The best book I've ever read about propagation was
"Low Band DX-ing" from the ARRL.  Lots of stuff
that went over my head.  I may dig it out and read
up on greyline and longpath.

As for antennas, I'm still just on my G5RV at 20 ft.
I want to eventually put up a tower and get my TR-3
tri-bander up there, or better yet I have an Explorer-14 with
40-meter dipole feature.  I would like to go to 60 or
70 feet this time if I can.  I need to collect
some more parts:  a base fixture for Rohn 25G,
a couple more sections of tower, some guy anchor
material of some sort and some more guyline.

At least at this site I shouldn't have any problem
with getting concrete to the holes.  No covenants,
and no building permit needed according to the county
inspector.

Chris
w0ep



Dan W7RF wrote:
> Hi Chris,
> 
> It is most likely polar flutter, since the usual path is an over the pole
> path. Signals arriving from multipath (longpath + shortpath) is more remote.
> 
> A good tool for propagation prediction based on SFI values K values is W6EL
> MINIPROP 
> Available for free at http://www.qsl.net/w6elprop/ 
> 
> Also, nice to see a new cluster of sunspots pushing up the SFI to 82 at this
> moment! Where were these spots for the 10M contest last weekend?
> 
> Good to hear you on the air. I keep trying to improve my antennas all the
> time and have been stopped for a while by the winter WX and snow. 
> What are your plans for new antennas?
> 
> 73, Dan W7RF 
> President NCARC 2009 W0UPS
> Rocky Mountain DX Club W0PA
> Mile High DX Association K0AB
> 
> 
> 
> -----Original Message-----
> From: chris at yipyap.com [mailto:chris at yipyap.com] 
> Sent: Wednesday, December 16, 2009 8:23 AM
> To: ncarc at mailman.qth.net
> Subject: [NCARC] propagation -- interesting echo on HF
> 
> Had an interesting thing happen this morning.
> 
> I was tuning around 40 meters CW and heard a station from Moscow, Russia.
> He had a very interesting echo effect going on.  I recorded it into my PC
> and brought up a program that lets me look at the audio waveform.
> I figure the delay was 0.076 seconds.  That's about 14,000 miles at the
> speed of light. 
> 
> Going to do a little more research.  I think maybe the echo was a long-path
> reception of the same signal, but 14,000 doesn't seem like the right number
> for longpath difference.
> 
> Chris
> w0ep
> 
> 
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