How to receive automatically NOAA wather satellite images with a Raspberry Pi and a RTL SDR. This project requires a Raspberry Pi 3 Model B a common NooElec SDR Dongle and a QFH Antenna in the attic. Article explains how to setup and configure software but no instructions on antenna.
Keep track of much more than the time with this Wi-Fi enabled device. HamClock is a desk clock that could show accurate time, geography, time zone, solar activ- ity, sunrise and sunset times, Maiden- head locators, beam heading,
The two dipoles are parallel with a distance of 12 cm and are also fed in parallel. The total length of the 4 m dipole is 208 cm and the 6 m dipole is 280 cm.
This article discusses how volume reduction can help in the reception of weak signals by reducing the noise level. It is commonly known that reducing the volume also reduces the background noise, and especially in the reception of weak digital signals it can be beneficial
The loops are made of 10 mm round aluminum tube. No bending pliers was used to gently bend 90 degrees to obtain a square with 53 cm inner sides. Each loop has an impedance of approximately 100 Ohm. To connect both radiators in phase, a quarter wave long feeder of 100 Ohm is required.
An experimental slim jim antenna for 70MHz band made with a wireman slotted line.
A blog dedicated to military communications shortwave intercepts, sponsored by the Teak Publishing