In article , Robert Swinney says...
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I suspect Marconi got the credit because he perfected the coherer, a sort
of liquid diode type of thing to detect RF.

(attributes got messed up a bit I think there, was that Bob's
comment?)

Coherers are not electrolytic, they use powdered metal filings which
stick together (cohere) under the influence of applied rf energy.

There is good reason to believe that while marconi developed the
coherer into a relatively well-funtioning product, he did not
invent it.

Reginald Fessenden invented the electrolytic detector which is
probably the 'liquid diode' mentioned above.

Jim


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