More about HF (26)

1-03-1993 | It had always seemed logical to the writer that when ferrite rods first appeared in broadcast receivers, the technique ought to be usable...

1-11-1992 | This is a short, efficient, horizontal indoor spiral transmitting / receiving antenna, using 139 feet (approx. 42 m), that can be compa...

1-09-1992 | 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...

1-06-1991 | The quest for ever reduced sizes of efficient HF transmitting antennas is a compulsive exercise which one has great difficulty in dropp...

1-11-1990 | This is the story of a very small experimental table-top HF transmitting/receiving loop antenna of simple, low-cost construction. The word...

1-03-1990 | The stabilizer presented here enables the precise tuning of HF oscillators for up to 100 MHz if these have a frequency control input. Tha...