| This is a short, efficient, horizontal indoor spiral transmitting / receiving antenna, using 139 feet (approx. 42 m), that can be compa...
More about HF (25)
| This transmitter was designed to provide a frequency-stable, near-fool-proof, RF power source for use in the initial design of new types of...
| The quest for ever reduced sizes of efficient HF transmitting antennas is a compulsive exercise which one has great difficulty in dropp...
| This is the story of a very small experimental table-top HF transmitting/receiving loop antenna of simple, low-cost construction. The word...
| The stabilizer presented here enables the precise tuning of HF oscillators for up to 100 MHz if these have a frequency control input. Tha...