Topband: Sudden Ionospheric Disturbances

[N7DF]

The following website has some interesting information that may help us to 
figure out what goes on in topband propagation
It seems to be reasonable to expect that VLF conditions relate to MF conditions
 
http://www.karlovsky.info/sid/temphtml.htm




  
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UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: Top Band Receiving Antennas

[Robert McGwier]

Joel and I have the contruction article from QEX online.

http://www.w5zn.org/160%20Meters.html

for our version of the W8JI 8 circle.
 There are modifications we are undertaking now and we'll post a note here
when these revisions are included.  These include what to us is an improved
feed, making it easier to match, greater impedance stability, and other
benefits due to operating at a higher impedance.

Bob


On Tue, Feb 22, 2011 at 1:52 PM, Chortek, Robert L <
robert.chor...@berliner.com> wrote:

> John Harden, D.M.D. wrote:
> The best, and most cost effective, receiving antennas out there are the
> Hi-Z Antennas triangle, 4-square and 8-circle arrays. I have the
> triangle array and it works fantastic. I has 6 electrically switched
> directions and a great F/B ratio. It is essentially equivalent to having
> six 500 foot beverages when looking at the Receive Direction Factor
> (RDF).
>
> I agree with John.  I also have the triangular array and, at 40' per
> side, it fits in my small backyard. It is an excellent performer and I
> HIGHLY recommend the system.  I've tried the DXE phased verticals, EWEs,
> K9AY loops, and a host of others. The triangular array is the best by a
> wide margin, and K7TJR's customer service is nothing short of amazing.
>
> 73,
>
> Bob/AA6VB
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> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
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UR RST IS ... ... ..9 QSB QSB - hw? BK

Topband: CQ 160 Meter SSB Contest Radiowave Propagation Forecast

[Thomas F. Giella NZ4O]

Below is my 160 meter radiowave propagation forecast for the CQ 160 Meter 
SSB Contest. I would appreciate some feedback on the usefulness of the 
forecast for DXing and contesting.

A simple yes or no directly to solarcycl...@tampabay.rr.com would be much 
appreciated.

BTW I own an email reflector group on Contesting.com. You can sign up for 
free propagation forecasts as well as documented goings on with solar, space 
and
geomagnetic weather at 
http://lists.contesting.com/mailman/listinfo/spaceweather .

CQ 160 Meter SSB Contest 160 meter Radiowave Propagation Forecast

GLOBAL MF 300-3000 KC PROPAGATION CONDITIONS EXPECTED WITH AN EMPHASIS
ON 600 METERS, THE MF AM BROADCAST BAND, 160 METERS AND 120 METERS-

Magnetic Equator-
Low latitude 0-25 degrees
Mid Latitude 25-60 degrees
High Latitude 60-90 degrees

NORTHERN HEMISPHERE-
East -> West To 1100 Mi /1800 km- Fair To Good
North -> South To 1100 Mi /1800 km- Good To Fair
South -> North To 1100 Mi /1800 km- Poor To Fair

SOUTHERN HEMISPHERE-
East -> West To 1100 Mi / 1800 km- Fair
South -> North To 1100 Mi /1800 km- Fair
North -> South To 1100 Mi / 1800 km- Poor

MF Propagation Forecast Scale-
Excellent- S9+1 Or Better
Good- S7-S9
Fair- S4-S6
Poor- S1-S3
None- S0

Northern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific and cross Equatorial propagation conditions in
excess of approximately 3200 mi / 5200 km
High Latitude- Fair

Northern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific and cross Equatorial propagation conditions in
excess of approximately 3200 mi / 5200 km
Mid Latitude- Good

Northern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific propagation conditions in excess of approximately
3200 mi /5200 km
Low Latitude- Fair

MF Propagation Forecast Scale-
Excellent- S9+1 Or Better
Good- S7-S9
Fair- S4- S6
Poor- S1-S3
None- S0

Southern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific and cross Equatorial propagation conditions in
excess of approximately 3200 mi / 5200 km
High Latitude- Poor

Southern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific and cross Equatorial propagation conditions in
excess of approximately 3200 mi / 5200 km
Mid Latitude- Fair

Southern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific propagation conditions in excess of approximately
3200 mi / 5200 km
Low Latitude- Poor

MF Propagation Forecast Scale-
Excellent- S9+1 or better
Good-S7-S9
Fair- S4-S6
Poor- S1-S3
None- S0

Standard Disclaimer-
Note! I use error prone RAW public domain data from the NOAA Space
Environment Center, as well as other U.S. government organizations, to
produce this radiowave propagation forecast. This data is gathered and made
public by the U.S. Government using taxpayer $$$, including mine.

However the MF frequency propagation forecast that I produce from the RAW
public domain data is my personal intellectual property. Therefore this
radiowave propagation forecast contained herein is copyrighted © 1988-2011
by Thomas F. Giella, NZ4O. Reproduction of information contained herein is
not allowed without advance permission and then only as long as proper
credit is given.

Also space weather forecasting is still an inexact science. The forecasts
are not official but for hobby related purposes only and are subject to
human error and acts of God, therefore no guarantee or warranty implied.



73 & GUD DX,
Thomas F. Giella, NZ4O
Lakeland, FL, USA
solarcycl...@tampabay.rr.com

NZ4O Solar Space Weather And Geomagnetic Data Archive:
http://www.solarcycle24data.org
NZ4O LF/MF/HF/6M Radiowave Propagation Forecast: http://www.solarcycle24.org
LF/MF/HF/VHF/UHF Frequency Radiowave Propagation Email Reflector:
http://lists.contesting.com/mailman/listinfo/spaceweather
NZ4O Daily Solar Space Weather & Geomagnetic Data Archive:
http://www.wcflunatall.com/nz4o1.htm
NZ4O Solar Space Weather & Geomagnetic Data In Graphic & Image Format:
http://www.wcflunatall.com/nz4o2.htm
NZ4O Solar Cycle 24 Forecast Discussion & Archive:
http://www.wcflunatall.com/nz4o4.htm
NZ4O 160 Meter Radio Propagation Theory Notes:
http://www.wcflunatall.com/nz4o5.htm
NZ4O Solar Space Weather & Geomagnetic Raw Forecast Data Links:
http://www.wcflunatall.com/nz4o6.htm
Harmful Man Induced Climate Change (Global Warming) Refuted:
http://www.globalwarminglie.org

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UR RST IS ... ... ..9 QSB QSB - hw? BK