Interesting Amateur Radio Sites
I've been maintaining the same links here and on the KSU Amateur Radio Club site. I decided I can do a better job with the links in one place. Click here to have a look.
My amateur radio activities in Manhattan, Kansas...
- shortwave listener since 1964
-- started with a Sentinel 305 5-tube receiver from 1948
-- used a Heathkit GR-54 general coverage receiver beginning in 1968
-- both still working just fine!
- received novice license on October 24, 1980
- received extra license on December 31, 1985
- volunteer examiner since 1986
- member: ARRL, KSUARC, Manhattan Area ARS, 10-10 International, Heard Island DX Association
- operating awards: 5BWAS, RCC, WAZ, DXCC (4 bands confirmed)
- 261 HF countries confirmed
- working on: 75m DXCC (6 to go -- maybe some day)
- primary interests: DX, HF propagation
- monitoring the KSØMAN repeater, 147.255+ and the WØQQQ repeater, 145.41-
- antenna farm: Butternut HF-6VX and Cushcraft A147-11 up 65 feet
- equipment: Icom IC-2AT, Kenwood TR-7800, Kenwood TS-930S, Ameritron AL-1200 amplifier
- trying to restore old broadcast radios
Here's my collection of antique radio links.
What's the sun up to? Sunspots? Flares? See for yourself.
Extreme Ultraviolet He II
NASA - Goddard
Extreme Ultraviolet Fe IX
NASA - Goddard
Soft X-Ray Telescope
NASA - Goddard
|These are today's images, direct from NASA. Click for enlargements.|
If the image says CCD Bakeout, click here to learn about that process.
|The Sun Now (images from the Solar and Heliospheric Observatory)|
HF Propagation Indicators
(NOAA / Space Weather Prediction Center)
A Indices of Geomagnetic Activity
- The above link should take you to the right place in the page. Look for:
V. STATION A INDICES
- A < 10 indicates a quiet ionosphere (good).
- A > 30 indicates a disturbed ionosphere (bad news / high signal absorption).
- The Boulder A index is also available from radio station WWV hourly at :18 on 2.5, 5 and 10 MHz.
Planetary K Index of Geomagnetic Activity
- This bar graph shows the most current indicator of geomagnetic disturbance.
- The A and K indices are related, but the K index will be a more up-to-date indication.
- For the K index, lower is better, and zero is great.
- A K index of 5 or above indicates storm-level geomagnetic activity.
- The Boulder K index is also available from radio station WWV hourly at :18 on 2.5, 5 and 10 MHz.
- K Index basics from Wikipedia
Solar Flux (X-Ray wavelength) graph
- Updated every minute, this graph shows flares (represented by X-Ray flux) and their classes (C, M, X, etc.).
- Orders of magnitude of solar flares are represented by the letters A (lowest), B, C, M and X (highest intensity).
- Big spikes in the graph = flares = big trouble 18 to 36 hours later (ionospheric storm likely).
Solar and Geophysical Activity Summary
- Text report: satellite proton events, current level of geomagnetic activity and Boulder and Planetary K indices
HF Propagation Links - By Source
AMERICAN RADIO RELAY LEAGUE
IONOSPHERIC PREDICTION SERVICE (IPS) - AUSTRALIA
NATIONAL EARTH SCIENCE TEACHERS ASSOCIATION
NORTHWEST RESEARCH ASSOCIATES
QSL.NET's PROPAGATION SITE
SPACE WEATHER CANADA
SUN VIEWER (ON TWITTER)
UNIVERSITY CORPORATION FOR ATMOSPHERIC RESEARCH
UNIVERSITY OF ALASKA
WIKIPEDIA: PROPAGATION CONCEPTS
WM7D's SOLAR RESOURCE PAGE
If you would like to learn more about HF propagation, predictions and interpretation of the data you can find above, I recommend The NEW Shortwave Propagation Handbook. CQ magazine offers the book for about $19.95. (Link). It's written by George Jacobs, W3ASK and Dr. Ted Cohen, N4XX. George Jacobs has for several decades written the monthly propagation column in CQ.