The sun is blank–no sunspots. This means solar activity is very low. Credit: SDO/HMI
NO FIREWORKS ON THE 4TH OF JULY: Sunspots vanished almost two weeks ago and, as a result, solar activity is very low. NOAA forecasters say there is no more than a 1% chance of strong flares on the 4th of July. Solar flare alerts: text orvoice
AURORAS AND NOCTILUCENT CLOUDS: Who needs sunspots? Despite a sudden lull in solar activity, July began with a beautiful display of color over Calgary, Alberta. Harlan Thomas photographed the sudden apparition of green auroras and silver noctilucent clouds
Via : http://spaceweather.com/
Antennas
You are using the WRONG toroid for an EFHW Antenna, Maybe!
Did you know, not all Toroids are created the same? They may look the same, but there is one big difference! UPDATE: I’m sorry, in the video I w... Read more
7 BAND HF COBWEB ANTENNA – 1 KW
COBWEB ANTENNA Multiband cobweb antenna works on 7 HF bands and up to 1000w. Bands are 14,18,21,24,28,50,70 MHz Built and modified by me for my friend... Read more
DIAMOND HF MOBILE “CL” SERIES ANTENNAS
The Diamond HF Mobile “CL” Series Antennas are a bit special. Centre Loafing is claomed to be superior to base loafing. Peter G3OJV, tests... Read more
Diamond D3000N Super Discone Ultra-Wideband Antenna
“In this video we cover the assembly, installation and testing of the 3000N Discone for use on an SDR and home scanner.” Ultra-wideband de... Read more
This Is Not A Tree – Disguised Radio Transmitter Towers
Disguised Radio Transmitter Towers Read more
How to Read an SWR Curve
“It’s impportant we understand where an antenna tunes and what is the 1.5:1 bandwidth, particularly for Amplifier users and those without... Read more
Tuning an Antenna without an Analyzer
“Lee, KD9SWA, wants to know how to tune his antenna without an analyzer as he does not have one right now. He has an SWR meter and some good met... Read more
Second Rule of Antennas : Height Matters!
Sergei, UB4LDT, has some questions having to do with the height of his antenna? But the basic rule is height matters! Read more
