Electronics > Projects, Designs, and Technical Stuff
Can a diode amplify sound?
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ELS122:
is a diode whit an indirectly heated cathode a triode?? I thought not... it's pretty much like changing the voltage of a diode at one end, which changes it at the other. and if the diode has some gain it could theoretically amplify the signal.
Gyro:

--- Quote from: ELS122 on December 12, 2019, 09:31:35 pm ---... and if the diode has some gain it could theoretically amplify the signal.

--- End quote ---

The diode has no gain so cannot theoretically amplify anything.
Yansi:
Here you are, a parametric audio amplifier using varactors... and some other interesting stuff. This is what I]d call a diode amplifier.



Courtesy of DL3PB, http://pa1b-qrp.blogspot.com/2012/02/parasaki.html?m=1
daqq:
In short: No.

In long: It might be able to hack together some awful solution with a uselessly small gain.
iMo:

--- Quote from: Yansi on December 12, 2019, 10:24:31 pm ---Here you are, a parametric audio amplifier using varactors..

--- End quote ---
TD718 is a tunnel diode, afaik..
You may use a traveling wave tube as well then :)
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