[Icom] Icom 756-Pro II audio/mic input alternatives

[Tony Hwang]

HFSSB wrote:
> 
> It's unusual to find fault with Adam's outstanding contributions to our hobby
> but re-reading Adam's comment here I see that the error is in the latter part of
> this statement, "... to cut off low-frequency components of the microphone
> output (below 250~300 Hz). These components contribute virtually nothing to
> articulation at the receiver,..."

Hi,
maybe we're talking about two different things here.
I somewhat know Adam's career background. That being said,
if we're talking about communication, below 250Hz, there's nothing much
for voice
articulation. Ever read Bob Heil's document when the very first time he
introduced
his HC-series mic. element? As a former telecomm, engr. we never thought
beyond 3KHz or
below 300Hz when designing voice network over long haul HF/VHF/UHF
links. 
Hi-Fi and SSB? No. Hi-Fi and AM or FM? Yes. Well, there is no Hi-Fi in
CW which is for me, hi.
Hi-Fi is in my den where there is my home brewed audio stuffs(still
heavily depending on
OLD tube gears) Now I am becoming un-Hi-Fi to support the needs of my
kid who plays
guitar. I am finding it as difficult to produce nice sweet distorted
music sound/tone
with rich harmonics. Converted a Bogen and Dynaco amp into a fairly good
sounding guitar
amp lately.(100 to 200W RMS range)
73,
Tony, VE6CGX
P.S. How about looking into spectrum analyzer while talking few
syllables into mic.
     to see where voice energy is most concentrated which carries
intelligibility.

> 
> Marty
> http://groups.yahoo.com/group/hfssbaudio/
> 
> -----Original Message-----
> Adam I don't know what you know technically and I respect your knowledge
> however I am amble to run my Heil HC5 through the W2IHY EQ and noise gate
> and get a nicer and more full range of audio by going direct through the
> balance modulator than through the front mic input ...
> 73, Steve
> ----- Original Message -----
> > Larry,
> >...the design intent
> > is probably to cut off low-frequency components of the microphone output
> (below
> > 250~300 Hz). These components contribute virtually nothing to articulation
> at
> > the receiver, ....
> > Best 73,
> > Adam, VA7OJ/AB4OJ
> 
> ----
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