[TenTec] Headset connection

Bob McGraw - K4TAX RMcGraw at Blomand.net
Tue Oct 2 14:30:36 EDT 2012

AHHH yes, Jim.....those were the good days when men were men, Chief 
Engineers must know how to fix things, and modulation was AM.

Bob, K4TAX

----- Original Message ----- 
From: "Jim Brown" <k9yc at audiosystemsgroup.com>
To: <tentec at 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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