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KF5JRV > TECH 13.01.17 14:23l 20 Lines 1213 Bytes #-3180 (0) @ WW
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Subj: Ambrose Fleming
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Professor Ambrose Fleming of University College London acted as a consultant to Marconi and he was very aware that detectors us
ed in the receivers were the weak link in the receiving equipment of the day. Having seen the Edison effect - an effect Edison
discovered when he was trying to extend the life of electric light bulbs, Fleming wondered whether this could be sued to detect
radio signals. He gave details to his assistant who set up an experiment that worked. The diode valve had been discovered. It
consisted of a heated element in an evacuated glass bulb. A second element was also placed in the bulb but not heated. It was f
ound that an electric current only flowed in one direction with electrons leaving the heated cathode and flowing towards the se
cond element called the anode, and not in the other direction.
73 Scott KF5JRV
KF5JRV.#NWAR.AR.USA.NA
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