[Elecraft] K3 Kenwood mic question
alsopb
alsopb at nc.rr.com
Thu Aug 14 00:46:38 EDT 2008
I'm surprised. You're missing the point entirely. It is not all about
communications as you define it, given the postings here.
The wild circumstances you refer to seem like the real world to me. Ham
radio is not a laboratory with carefully controlled experiments. It's a
bunch of random happenings.
Guys are trying to obtain fidelity. That is their goal. Hence all
enumerated factors of my posting are important and frame the difficulty
obtaining good set of equalizer settings.
BTW: I agree with you and Reily that it SHOULD be about communications not
fidelity. Clearly a large percentage of phone ops don't agree.
Even for your communications scenerio adjustments, which allow getting
through under tough QRM and tough propogation conditions, have to be a
relevant consideration. You can't dismiss this reality. Ham bands are not
the audio laboratory.
Since you have again booted me to an irrelevant reference, I assume you
have no answer or algorithm to achieve what posters seem to be after.
Alternatively, given you're response, I (or maybe we) are too lazy or dumb
to figure it out. We obviously need someone less lazy/less dumb to spell
out the steps.
73 de Brian/K3KO
Jim Brown-10 wrote:
>
> On Wed, 13 Aug 2008 20:35:05 -0700 (PDT), alsopb wrote:
>
>
>>Let's assume you don't talk to just one or a few stations over and over
>>again but instead the random type contacts most of us make.
>>How are you going to reduce the 12 trillion combos to a few dozen to try
>>given:
>
> You're thinking as a mathematician. I'm an engineer. I deal with the real
> world
> and practical solutions, not wild circumstances.
>
>>1) You don't know the filter width the station listening to you has. Is it
>>1.8, 2.1. 2.8, 6 KHz?
>>2) You don't know the speaker or earphone frequency response of the other
>>station
>>3) You don't know the ear frequency response of the listener
>
> This is ham radio. It's about communications, not hi-fi. Paraphrasing
> Riley
> Hollingsworth, if you want to transmit broadcat audio, buy a radio
> station.
>
>>4) Most hams probably don't know their microphones frequency response
>
> That CAN be a known if you're not mentally lazy and you buy REAL mics with
> real
> spec sheets, not products with big advertising budgets and cut sheets
> written
> by marketing weasels.
>
>>5) The propogation and QRM conditions are highly variable
>
> Has nothing to do with frequency response.
>
>>6) How does compression factor in?
>
> Is different from frequency response, but from a communications point of
> view,
> it's a good thing.
>
> I'm an EE by training and an audio engineer by trade. I'm also a Fellow of
> the
> AES. I make my living by doing great audio. But this is ham radio.
> Excellence
> is about maximizing communications, which requires good linearity in the
> speech
> region and efficient use of the bandwidth.
>
> I suggest that you study the tutorials I've prepared on this topic,
> previously
> cited.
>
> 73,
>
> Jim Brown K9YC
>
>
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