This article describes the development of two tunable antennas each consisting of three interconnected small loops and capable of providing excellent DX performance. The aerials are home-constructed, and located in a very small garden with a minimum of visual impact on the neighbours and are low enough in height to avoid the attention of UK planning authorities.
Roach pole vertical antenna for 40 and 30 meters band featuring good performance on short skips contacts compared to wire dipole
Tutorial, How to call CQ as an HF QRP station in SSB/Phone. Calling CQ Basics, Calling CQ QRP or Portable
How to use a small USB DJ controller to remote control the Kenwood TS-590s
This Hybrid SDR is a combination of a current technology analog radio techniques, used with a direct conversion software defined radio to create a single conversion “hybrid” radio that is usable over a wide range of frequencies
The circuit is simple, designed with a low component count and an inherent simplicity in order to keep the cost of building the preamplifier low, and to assure low noise operation.
This page gives a brief description of a 70 MHz transverter that has been published in the Danish amateur radio magazine “OZ.” This way hams outside Denmark may also benefit from the design.