Vintage Radio Valves
Mike's electric stuff
Magic eye tuning valves
JMH's   virtual valve museum
G8LSD    valve collection
 


Radio ULF - ELF - VLF - LF
Utility radio stations
The Long Wave home page
A Minimal ELF Loop Receiver
Exploring Very Low Frequency Natural Radio
Natural ELF VLF Radio Phenomena
VLF whistler
VLF Whistler Reception
Lower Limit of Spectrum and 'Nature Radio' ELF and VLF
Radio waves below 22KHz


HAARP
HAARP   High frequency Active Auroral Research Program   -  Alaska
HAARP HAARP how it sounds like - Pulse analysis
Electromagnetic weather altering   HAARP


Amateur radio G7FEK limited space multiband antenna
G7FEK Multiband Antenna for a Small Garden - Construction Guide - PDF - 46 feet long and 24 feet high. 80m-40m-30m-17m-15m-12m . (20m and 10m with modifications)
G7FEK Antenna Revisited - PDF - Written by G8JNJ
G7FEK Antenna QSO test on 7MHz band between two VK stations (distance unknown) - Youtube Video.


Top Band 160M
Top Band 160 Metre Propagation Utilities
Adding Top Band - 160M - to the inverted-L antenna
Near Realtime Grey Line Map


Antenna
An Improved Multiband Trap Dipole Antenna - PDF
RF Ground Systems
Toroid Ring info and Calculator
Baluns and Tuners - G8JNJ
A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing - PDF
Cost-effective ferrite chokes and baluns - PDF - GM3SEK
Coaxial Trap Design Software (windows XP / 7) - freeware
Common Mode Chokes - PDF - W1HIS
Antenna Traps
80M and 40M trap frequency
Antenna Notes
More On The 1:1 Balun - Jerry Sevick W2FMI


Antenna Modeling
MMANA-GAL basic help
Simulation of Wire Antennas using 4NEC2


Spy Numbers Stations
Spy Numbers Links
Spy Numbers Recordings
East Germany (Cold War Era) Spy Numbers (Gong) Simulator Programme (Windows XP/7) freeware. Very authentic sounds. Can even enter your own digits.
Shortwave Espionage
The Conet Project - Recordings of Shortwave Numbers Stations - PDF booklet


Miscellaneous items
NIST Cesium fountain atomic clock
Boulder USA physics laboratory - NIST
The German ENIGMA cipher machine . very detailed workings , history of Colossus , Bletchley Park
Build a modern day electronic ENIGMA cipher - decipher machine
THE HUM ... have you ever heard this phenomena ? . . . . . . . Could the HUM have been due to this USA cold war project 76Hz E.L.F. powerful 2.6MW transmitter. (youtube video) . . . . . . . . Wikipedia info
SETI@HOME search for extraterrestrial life radio signals
Spot the mistakes in simple published hobbyist electonic project circuits . . intriguing no matter what expertise you have.


www.weathercharts.org    home page

 

misc keywords g8kpy old vintage radio valves antenna multiband RF ground ELF VLF