"Mike Coslo" wrote in message
...


Groom Lake wrote:

In Message-ID:Kl6Gc.1758$%w5.429@okepread05 posted on Mon, 5 Jul 2004
01:15:08 -0500, Rob Mills wrote:


I wasn't much into
gab but enjoyed tinkering with the equipment more than gabbing on them
so
soon sold out except for a CB I used in the truck. I drove an 18 for a
living and retired in 84 and haven't keyed anything since. RM~


Back in '66 I put one of those (pre-bucket brigade) delay boxes* with a
spring and two transducers in line with my audio and some of the locals
thought the echo was due to the enormous power level, similar to 15
meter multipath, rather than just a precursor to today's echo-mike.
*note - those delay boxes were more commonly used in conjunction with
automotive 8-track players, and would make that distinctive boing effect
whenever you hit a pothole or crossed the tracks too fast. ;-)

Well, since the topic is shifting, can anyone tell me what the echo is
supposed to do? in my travels, with my CB on, I can "hear" people with
echo mic's and I'll be darned if I can hear them well at all. Now echo
AND way overmodulated, now there's the ticket to complete
unintelligibility! (is that a word?)

- Mike -


They "think" it makes them sound better or more cool, not sure which.
Problem is, most are turned up TOO far. Some isn't so objectionable and
doesn't sound bad, even though they're not supposed to be permitted per part
95. I've heard so many that sounded like they were talking either
underwater or with a mouth full of something. REALLY SUCKED.

Being both a ham and Cber, I can't see what their sense of existence is.
Then too, you got everyone and his brother cranking up the RF out, and if
they go channel hopping, that bleeds like hell. I had to take a double take
one time when I and a friend of mine were in another CB shop, and actually
heard two CBers swear off the extra garbage and go back to stock TO HEAR!
WOW. I asked my friend if I heard right, and he agreed. I don't do any mods
to CBs or other radios unless permitted by law or needed to get the thing
working, when a unit comes to my shop. Many don't like my approach, but so
be it.

Lou

Audio enhancement

All modern ham rigs incorporate compression in the audio chain; this effective
pushes up the room sound a bit without the echo/reverb being overpowering.

It is puzzling why hams have not commonly adapted well-known psychoacoustic
observables to increase intelligibility. These include: a 50 ms delay on
transmit; and binaural (delay and phase invert) synthesis on received. The
latter has had some exposure in recent years.

I recall using both the of these circa 1985 at Field Day with pro audio
outboard boxes. The problem--on transmit--is isolating them from the RF so they
don't overload.

CB has always had an over the top approach to audio--which rather defeats the
purpose of said synthesis.

Anyway, old stuff, well-known to music producers and some audio engineers.

73,
Chip N1IR