National NC-100 Receiver
As received, this National NC-100 was in a very sorry state. Several knobs were missing, as were most of the valves (and those that were there were not the correct ones). The set had...
Monthly Archive: July 2018
LoTW application appeared for Android and iOS.
The application called “MyLoTW” and works with ARRL LoTW service on Android and iOS platforms. The mobile application allows you to: Look through all the QSOs loaded into LoTW. Add new callsigns to your...
Simple modification of the HM-36 Microphone from ICOM
The Icom HM-36 microphone is a simple electret mic. But many owners notice that some microphones sounds bad. What reason? There are two different types of ICOM microphone HM-36 (exclude chinese fake): First type...
Dipole antenna design. Some theory and construction.
A dipole antenna is a symmetrical antenna, consisting of two quarter wave elements, connected to each of the two conductors (inner and outer) of a coaxial cable. You will need a center insulator for...
Antenna Loop Feed Array Yagi on 50 MHz band
The Yagi antennas with a frame vibrator, located in the plane of the antenna, are called LFA-Yagi (Loop Feed Array Yagi) and are characterized by a greater operating frequency range than the usual Yagi....
Extended version of the W3DZZ-antenna
The antenna, shown in the drawing, is an extended version of the well-known W3DZZ-antenna, adapted for work on 160, 80, 40 and 10 m bands. For installation of the antenna it is necessary space...
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