Information om | Engelska ordet COHERER

Exempel på hur man kan använda COHERER i en mening

• One drawback of Marconi's approach was his use of a coherer as a receiver, which, while providing for permanent records, was also slow (after each received Morse code dot or dash, it had to be tapped to restore operation), insensitive, and not very reliable.
• The metal filings in the coherer remained conductive after the signal (pulse) ended so that the coherer had to be "decohered" by tapping it with a clapper actuated by an electromagnet, each time a signal was received, thereby restoring the coherer to its original state.
• After receiving a signal, the metal filings in the coherer had to be reset by a manually operated vibrator or by the vibrations of a bell placed on the table nearby that rang every time a transmission was received.
• British radio pioneer Oliver Lodge made the coherer into a practical receiver by adding a "decoherer" which tapped the coherer after each reception to dislodge clumped filings, thus restoring the device's sensitivity.
• Because the output was an audio alternating current and not a direct current, the detector could only be used with earphones and not with the common recording instrument used in coherer radiotelegraphy receivers, the siphon paper tape recorder.
• In effect, it was a highly sensitive thermoresistor, which could demodulate amplitude-modulated signals, something that the coherer (the standard detector of the time) could not do.
• In his publication Signalling Across Space Without Wires, Lodge tabled Branly's filings, Minchins impulsion cell and his own (and David Edward Hughes's) coherer as "microphonic" radiation detectors (the others being mechanical, electrical, thermal, chemical and physiological).

Förberedelsen av sidan tog: 111,49 ms.