[Boatanchors] Intelligibility on SSB

[Glen Zook]

When Collins went to the 2.1 kHz mechanical filter the
audio was "cut off" above 2400 Hz but the low end was
still 300 Hz.

Remember that SSB was designed for communications
quality audio and not "hi-fi".  

If you really want to hear some "strange" audio then
listen to an ACSB signal that goes through a repeater.
 The audio is processed no less than 16 times.  Now
the audio sounds perfectly fine but virtually all of
the characteristics of individual voices are removed
and just about everyone sounds "alike".

Glen, K9STH


--- Ken <n5cm at rtconline.com> wrote:

As I see it, a rather big problem exists because of
the trend in design cutting off the lows, at 300
cycles & down, the later Collins rigs went down from a
3.1 bandpass to a 2.1 I believe cutting off at 400
cycles. I have a deep voice. If you cut off everything
below 400 cycles, you are not hearing my natural
voice, you're hearing the harmonic content. When the
Collins KWM2 came out a good friend of mine, W5DLA in
Gulfport Miss, bought one with the recommended
microphone. Well, I had been talking to many hams on
75 meters for years almost all using phasing rigs. I
visited W5DLA while passing thru his town and he was
talking to the usual crowd that hung out on 3925 Kcs.
When I spoke to them, none, and I mean NONE, knew who
I was! When I told them they were skeptical. My home
rig was a Central Electronics 10B driving a homebrew
modified 1625 gg driving 4 modified 1625's gg using a
D-104 microphone.










Glen, K9STH

Website:  http://k9sth.com


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