Re: Elecraft Digest, Vol 167, Issue 26

[Bob McGraw - K4TAX]

Richard:

I agree with Don, W3FPR and Jim, K9YC on the EQ issues.    I do think
the +3, +9, & +12  values are excessive, unless the mike you are using
is lacking in high end for some reason, or is a dynamic mike which may
be heavy in low end due to proximity effect.

Regarding mikes and proximity effect, back away from the mike about a
"fist" distance.  I find this to be more effective than trying to EQ
something.  Mike technique is much more critical to good / great
sounding audio than many hams realize or have been taught
incorrectly.    Don't EAT the mike!      I have and use some really good
professional mikes as well as some $19 el-cheap-o dynamic mikes.   For
ham purposes they are all about the same. The key to making them "all
sound the same" is mike technique.

I agree that there is little to no articulate information in the human
voice below 200 Hz.  "Down there" is room rumble, HVAC noise, amp fan
noise, of which none contribute to good / great sounding audio and sucks
up transmitter power.  And yes, the typical SSB filter begins to
attenuate anything above 2.7 kHz to 3 kHz or so.   Excluding ESSB
modes.  "Up there" is nasal whistles, lip smacks, sibilant sounds and
such.    Again, none of these contribute to good / great sounding
audio.    If you hear an operator inhale between words or
sentences.......he needs to take steps to improve his audio.  Either
adjust the mike gain correctly, adjust the speech processing correctly
or improve his mike technique.

Agreed, it is always better to use an EQ to attenuate as opposed to
boost a frequency or band, as in-band phase shift is usually less.  That
makes the audio sound "less EQ'd" and thus more natural.  The general
thinking, and usually most incorrect, is "you need more of this or more
of that".   When correctly it should be "you need less of this and less
of that".  Why is it we always seem to want more?

I do not agree with Bob Heil where he suggests using a 2nd receiver and
headphones to listen to your signal.  Reason: a significant part your
voice sound is transmitted to the ears via internal bone conductivity in
ones head.  This is not accounted for in the simultaneous transmitting
and listening process with headphones.   Likewise, same for the Monitor
function in most radios.    It is much better is use free software such
as AUDICITY to record from the 2nd receiver and then listen to the
recording to get a more accurate evaluation of how it sounds.

Just an old retired recording engineer's thoughts.............based on
years and years of experience. With today's radios, there is no reason
not to have great sounding audio.    However, getting someone on the
other end to give you an accurate and composite audio report is a real
challenge.

73

Bob, K4TAX


On 3/18/2018 10:03 PM, [hidden email] wrote:

> Richard,
>
> Remove the boost on the high end.
> You can reduce all bands if you want to maintain the same curve.
> It is better not to boost, but cut instead.
>
> 73,
> Don W3FPR
>
> On 3/18/2018 1:09 PM, Richard wrote:
>> Bill,
>>
>> Tx EQ:
>> 50  =  -16
>> 100  =  -12
>> 200  =  -6
>> 400  =  0
>> 800  =  0
>> 1200  =  +3
>> 2400  =  +9
>> 3200  =  +12
>>
>> This works well for me.
>>
>> Richard - W4KBX

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