[Elecraft] Motorola communications speakers

Ron D'Eau Claire [email protected]
Thu Aug 1 12:23:00 2002


I went one better (I think). I found a couple of the new(er) AMPLIFIED 
Motorola speakers...! Dunno how much they'll put out (I'd guess 5W-8W),
but 
they 'crank'!  Tom Hammond   N0SS
----------------

When I worked on that gear in the 1980's, Motorola (and their nemesis in
Land Mobile, E. F. Johnson) had speakers with a very pronounced peak at
about 800 Hz. The audio response up around 2 kHz was darn near 'nil, to
minimize the sound of the digital subcarrier on the "trunking" radio
systems that tended to peak up around there. Similarly the low end
rolled off very quickly down around 300 Hz. 

Their response was very close to what Wayne/Eric say they designed the
K2's SSB filter to provide. And they do provide incredible punch in very
noisy environments (ambulances, etc.). They were GREAT for what they
were designed to do  - provide maximum clarity of speech for brief
verbal communications under adverse conditions. 

Personally, I always found their audio characteristics irritating to
listen to over time with that obvious peak in the response, but then I
never went to a rock concert either and I avoid modern movie theatres.
From what I read, the hearing of people under 30 today is substantially
worse than that of many older people. As one doctor pointed out to me
recently, it used to be "grandpa" who wore a hearing aid. Now he fits
them on more people under 40 than he does people over 60, and he said
that was just the "tip of the iceberg". For every case needing an aid,
there are thousands living with damaged hearing who have learned to
compensate for it and don't even realize that they are half deaf.

Wow...

Ron AC7AC
K2 # 1289.