This project is about a cheap way of building a colinear antenna for VHF 145MHz, and having about 10dB more gain than that little 1/4-wave magmount
Some printable logbooks or logsheets, made to use whilst operating portable. Download free PDF files in landscape and portrait A4 Format.
The recent high-resolution map of Maximum Usable Frequencies (MUFs) for 3,000 kilometer radio signal paths. This map is useful to determine maximum usable frequencies for any world-wide path at the indicated UTC (Zulu) time.
A numbers station, also known as a one-way voice link (OWVL), is a special type of unusual radio broadcast, generally on the Short Wave (SW) radio bands
A detailed review of the Icom IC-R20 wideband radio receiver by UK midland Scanner
An updated calendar schedule of spy numbers stations in english, german, slavic, morse and digital mode
History of numbers stations with reference to Enigma machine as used during the WW
eHam.net reviews of the Icom IC-R20 wideband receiver
Article on common Classification of Spy Numbers stations.
ICOM IC-R20 Portable Receiver review by Bob Parnass PDF File.