spark-gap transmitter

Things have come a long way from the days of spark-gap transmitters.

The next year, he added a spark-gap transmitter and demonstrated the first radio communication set in Russia.

The spark-gap transmitter created interference with other American radio stations and was soon out of date.

Sparks, nickname for radio operators, after the spark-gap transmitters used in the early age of wireless.

The next year, he added a spark-gap transmitter.

I have been considering your requests, the Hertug said, turning away from the spark-gap transmitter.

It wouldn't have to be a screen-even a spark-gap transmitter would do."

These spark-gap transmitters were used during the first three decades of radio (1887-1917), called the wireless telegraphy era.

After this, wireless telegraphy using spark-gap transmitters quickly became universal on large ships.

Around the turn of the century it began to be widely used in spark-gap transmitters and medical electrotherapy equipment.

Communication was generally conducted in Morse code, initially using spark-gap transmitters.

Why would you run a spark-gap transmitter?

For instance Spark-gap transmitters were quickly outlawed as they give an output which is so wide in terms of frequency.

Spark-gap transmitters are now illegal, because their transmissions span several hundred megahertz.

These include the spark-gap transmitter and the coherer.

A spark-gap transmitter is a device for generating radio frequency electromagnetic waves using a spark gap.

Use of the spark-gap transmitter led to many radio operators being nicknamed "Sparks" long after spark transmitters ceased to be used.

Armstrong's research and experimentation with the Audion moved radio reception beyond the crystal set and spark-gap transmitters.

Both groups quickly come upon each other, and working together, they are able to survive as Tom Swift builds a spark-gap transmitter radio from salvaged parts.

Radio amateur message relay operations were originally conducted using Morse code in the first two decades of the 20th century using spark-gap transmitters.

The first crystal sets received wireless telegraphy signals broadcast by spark-gap transmitters at frequencies as low as 20 kHz.

Receivers with thermionic valves became commonplace before spark-gap transmitters were replaced by continuous wave transmitters.

Unlike the spark-gap transmitters and arc converters also used at the time, the Alexanderson alternator produced a continuous wave output of higher purity.

With early spark-gap transmitters, changing the transmission frequency was most easily accomplished by changing the number of Leyden jars connected to the tank circuit.

Using spark-gap transmitters plus coherer-receivers were tried by many experimenters, but several were unable to achieve transmission ranges of more than a few hundred metres.