Wasn't it Nikola Tesla who invented or discovered the basic concepts of
tuned circuits?

Doug


"Airy R.Bean" wrote in message
...
I have a copy of "The Electrical Review" from 1902 wherein
Signor Marconi is describing his experiments with "syntonising",
a means by which the station at Poldhu no longer interferes
with the station on the Lizard. It was clear from the article
(although I have not referred to it for several years) that he
is referring to tuned circuits.

We take many things for granted nowadays, but even the
concept of tuning was the subject of a patent in them thar days.

"Thomas H. Busch" wrote in message
...
Wikipedia has an entry for Tuned RF receivers that says EH Armstrong
invented the Tuned RF receiver in 1918. I think this is wrong.
Armstrong
was in the throes of patenting the superheterodyne circuit at that time.

Hazeltine invented the Neutrodyne, but this was an improvement on the TRF
circuit. Was it just one of those things that logically developed from
wanting a bigger signal for the detector?