01-04-20 02:35 John-Del wrote to Ed Vance about Re: More about that Chine Howdy! John-Del,
-snip- > When I was in High School (1956-1959) I told a friend that I wondered > if a Intercom systems Audio Output on one end could be ran through a Diode > positioned on one lead -->|-- > > and the Audio Output at the other end have a Diode positioned --| have a Two Way conversation without either end having to flip the > Listen - Talk Switch, and no Audio Feedback could occur because of the > difference of Polarity. > > My friend connected a Diode between an Audio Amplifier and a Speaker and > I remember the sound I heard was terrible, distorted iirc. > > I built a Heathkit AA-32 Tubed Stereo Amplifier in the 1970's. > I can't remember if Heath offered Transitorized Stereo Amplifiers back then. > > I've heard beautiful Audio from Both Transistorized and Tubed Hi-Fi System. > BUT > I always remember hearing the racket coming out of my friends speaker when > he used that Diode to demostrate what it would sound like. > AND > When I (even) see a advertisement for a Semiconductor Audio Amp I always > think why did a Square Wave sound so bad back then but doesn't in the gear > sold now. >
Jo> Not sure of your point but if you used a diode of any construction Jo> including a vaccuum tube diode, you would have heard the same Jo> distortion.
I have always thought a Audio Sinewave going through a Transistor would come out as a Squarewave, not a Sinewave.
To my way of thinking a Sinewave is Pure Audio, a Squarewave would make the signal sound distorted (a bit?).
Does it happen as I imagine, or am I way off base.
I never seen the pattern of the output on an oscilloscope so I don't really know.
73 de Ed W9ODR
... There is always one more thing for Me to learn...