va3rom001023.jpg
Commercial use of any material is expressly prohibited. Educational use is permitted with implicit consent.
email.gif va3rom001021.png va3rom001020.png va3rom001016.png va3rom001015.png va3rom001014.png va3rom001013.gif va3rom001012.png va3rom001011.png va3rom001010.png va3rom001009.png
 
 
Contact VA3ROM
solarham.png
"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.
Updates
 
November 4, 2019
Added support files for my last All Things Digital titled column "Resonant CW Speakers" (ATD041) to my new Radio Magic page.
 
November 1, 2019

After eight years itís time for a change & all good things must end, so Iíve decided to end ďAll Things DigitalĒ & start a new column & web page called ďRadio MagicĒ, which will cover a more diverse range of radio & electronics related topics from the past, present & into the future. Radio has & will always have a magical appeal & hold on me, which is probably very true for many others. Itís also probably the same reason why so many of us have or have had careers in science, technology, engineering & mathematics (STEM).

 

Note: All the old All Things Digital articles & files remain in place, there're just under the new page title.

 

September 24, 2019
WWV Centennial Festival of Frequency Measurements
As part of the WWV centennial, HamSCI & the Case Amateur Radio Club of Case Western Reserve University (W8EDU) project, all Amateur Radio stations, shortwave listeners & others capable of making high-quality HF frequency measurements are asked to participate in the next "phase" of this experiment & publish their data to the HamSCI community using the open-data sharing ZenDo website. See HamSciWWV100FMT for more details. Via Southgate Amateur Radio News.

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 server.
 
My KiwiSDR 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 columns.
 
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'sINSPIRE project & the SARA 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
Added 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.
craigshamradio.png va3rom001006.png va3rom001005.png va3rom001017.png va3rom001004.png va3rom001003.png va3rom001001.png