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"All that is necessary for the triumph of evil is that good men do nothing." Personal web site. Not affiliated with any agency. Copyright © 2000-2019 R. C. Mazur, VA3ROM.
September 7, 2019
Getting started in the weird or what world of very low frequency (VLF) radio signals
using Spectrum Labratory software with a soundcard connected a run of RG8 coax & an outside 20 m slopping wire
antenna with another connected to a CCW active vertical dipole. Second order highpass filters were added to peak the
signals along with back-to-back diodes to protect the soundcard input from high voltage signal spikes. Spectrum
Lab records, saves & plots the relative signal strengths of various high powered navy VLF beacons used for communicating
with submarines & sometimes surface ships.
The idea is to detect various ionopsheric effects caused by solar storm
sudden ionospheric disturbances (SIDs), meteor induced electro-accoustic waves, possibly earthquakes (according to some new theories) &
any other related space weather induced phenomena. The dirunal affects caused at sunrise & sunset in the reception patterns
of the plots are also very interesting. A new real time VLF SID Monitor page has been created & includes
a few VLF links to help you get started, too.
Data is also streamed to the Stanford SOLAR Center
is available 24/7 via the SDR.hu
web server under "VA3ROM" for VLF and up & is connected to the CCW antenna's second
antenna port so you can give VLF monitoring a "try before you buy".
August 27, 2019
Added two more re-editted past TCA columns
"Amateur Radio Science" (parts 101 & 102) from early 2019 to the All Things Digital page.
Just got the amazing
new Cross Country Wireless 5 kHz to 30 MHz active vertical dipole antenna. It's very stealthy & can feed two receivers at the
same time. I use it with my SuperSID VLF receiver & KiwiSDR.
August 14, 2019
Added another re-editted past TCA column "How
do you solve a 'problem' like FT8?" to the All Things Digital page & this completes all previously puublished 2018
August 11, 2019
Finally had some time to re-edit & release a set of my past TCA columns: "The Pixie 2", parts
1 and 2 & "The Cricket". See the All Things Digital page.
Also added two new links to NASA's INSPIRE
websites to my All Things Digital
page. Both have interesting ionopshere studies using VLF (very low frequency) receivers for
students of all ages. One is designed for portable field work & the other for fixed use with a computer.
June 28, 2019
a simple & inexpensive 80 m band quarter-wave wire sloper down to the bottom of my base loaded homemade vertical. The
high end is only 6 m AGL with two (shared with the vertical) 15 m slightly elevated radials running north to south
in line with & under the sloper. It has performed very well in all directions using FT8 & even picked up a
few DX stations. Slopers are a great alternative if you don't have room for full-sized dipoles, and it even improved
the VSWR for the vertical antenna a tad.
Added support files for my latest TCA ATD040 column "JS8 Calling: Part 2" to the All
Things Digital page.
June 23, 2019
Added an interesting paper called "A Citzen Science Network for Measurements of Atmospheric
Ionizaing Radiation Levels" to the All Things Digital page. During periods of solar minima old Sol isn't as effective in "shooing"
away any incoming highly energized galactic cosmic rays from penetrating deeper down through the Earth's magnetosphere &
reaching closer to the surface. People living at high altitudes, frequency high flyers, and those living in specific parts of
the world are irradiate with higher levels of radiation. Its also believed that weather & climate can be affected during prolonged
periods of solar minimas as a result of intense cosmic ray irradiation of the upper atomosphere (stratosphere).
April 28 2019
support files for my latest TCA ATD039 column called "JS8 Calling: Part 1" to the All Things Digital Page page.
Added new link (midway down this page) to Hamwaves
, which has some excellent propagation information at a glance &
other useful tools & links.
30 March 2019
Added new link (midway down this page) to Dr. Tamitha Skov's Space Weather
solar forecast website. She makes the science very easy to understand for those of use without doctorates in astrophysics!
rapid & amazing development of JS8Call
continues! Jordan, KN4CRD has plans for a separate JS8Call database webserver similar
to the WSPRNet with added messaging & propagation features.