Lee, K1VZI communicates with his friend hundreds of miles away through a satellite passing overhead. He gave me a demonstration of how it is done using mapping software and automatic positioning directional antennas. This contact was done in CW mode (Morse code) transmitting on 70cm and receiving on 2m. Notice the frequency shift with dopplar effect and the need to constantly adjust the dials as the satellite is zooming overhead!
MonoBeam Yagi MB7 The MB7 10-15-20-40 is a quad band antenna for 7 MHz, 14 MHz, 21 MHz and 28 MHz with loading coil and capacitive hat for 40m only. The feed is direct through a single 50 Oh... Read more
Multi-Band Dipole I built a multiband dipole that will work 40, 20, 17, and 10 meters for ham radio. An easy project I was able to tackle in one day. Calculations for the wire lengths can be... Read more
Version 3.0 of our popular traps are now available. Version 3.0 are supplied with 4 high quality Cornell Dubilier CDV16 RF Mica capacitors for greatly improved performance. The new capacitor... Read more
For years now Hams and Shortwave Listeners have been building antennas out of that great American toy: The Slinky. In this video we string two out to form a dipole and hook them up to SDRPla... Read more
DXplorer™ is a unique web-based system providing facilities for on-air antenna system testing and comparison as well as real-time HF propagation analysis. DXplorer™ has been designed to be u... Read more
MONO 3 40 moxon is every contester’s dream, a rugged monoband yagi, compact design and large bandwidth. Specifications Frequency MHz: 7~7,3 Active elements: 3 Gain dBi*: 12,2 Gain dBd**: 5,0... Read more