AHHH yes, Jim.....those were the good days when men were men, Chief
Engineers must know how to fix things, and modulation was AM.
73
Bob, K4TAX
----- Original Message -----
From: "Jim Brown" <k9yc@audiosystemsgroup.com>
To: <tentec@contesting.com>
Sent: Tuesday, October 02, 2012 1:13 PM
Subject: Re: [TenTec] Headset connection
On 10/2/2012 4:35 AM, Bob McGraw - K4TAX wrote:
In many mike elements the voltage swing from + to - is not equal.
Actually, this is a characteristic not only of the human voice, but also
of some acoustic musical instruments. Back when we both were young pups,
AM broadcasters used polarity flippers in the audio line so that the
hottest side of the waveform was always on top. As I recall, this was one
of Leonard Kahn's ideas. I remember having built a negative peak clipper
for my rig in the late 50s. BTW -- the reason for this is that distortion
is produced by carrier cutoff, but not on the positive peak. I'm sure you
know all this stuff, Bob, but others may not.
73, Jim
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