[Elecraft] RX eq

[Joe Subich, W4TV]

After a career that started in the recording studio, spent time in
radio and then as a TV audio man before moving into management, I've
done a lot with voice equalization ...

 > I use a Heil Elecraft ProSet with the electret mic.  My "Audio Elmer"
 > [K9YC] suggested setting the TX EQ:
 >
 > 0.05 -14
 > 0.10 -10
 > 0.20  -6
 > 0.40  -2
 > 0.80   0
 > 1.60  +4
 > 2.40  +6
 > 3.20 +10

Your numbers are remarkably similar to mine - particularly when you
compare 400 Hz to 1600 Hz and look at the 6dB/octave slope at the
high end:

  0.05 -16
  0.10 -16
  0.20  -6
  0.40  -0
  0.80  -3
  1.60  +6
  2.40 +10
  3.20 +12

I've always used a bit of a "notch" around 1 KHz.  Since most voices
have no energy in the 800 - 1200 Hz range, adding a notch makes any
system less susceptible to feedback and reduces noise pick-up without
compromising fidelity.  For both communications and PA applications
the notch also seems to aid in intelligibility by cutting down on any
noise in that range.

73,

    ... Joe, W4TV


On 2/18/2012 6:50 PM, Fred Jensen wrote:
> On 2/18/2012 3:14 PM, Joe Subich, W4TV wrote:
>
>> Electret ("condenser") mics also show a bass boost when worked close as
>> with a headset or close talked hand mic.  That's why - in addition to
>> limiting hum and background noise - it's generally best to set the K3's
>> two lowest EQ bands to -16 and set 200 Hz to -6 or so.
>
> While in college, I had a job for awhile at KPFA [FM] in Berkeley CA.
> They had one of those old RCA "velocity" mics [the sort of
> prismatic-shaped ones, fairly big] on the control board and one of my
> shifts was to sign the station on the air at 0600.  I discovered that,
> if I crawled right up to the mic while reading the sign-on script, I
> could sound like Johnny Cash instead of a 17 year old.  The effect was
> striking.  I think it's true of most mics, this one was just extreme.
>
> I use a Heil Elecraft ProSet with the electret mic.  My "Audio Elmer"
> [K9YC] suggested setting the TX EQ:
>
> 0.05 -14
> 0.10 -10
> 0.20  -6
> 0.40  -2
> 0.80   0
> 1.60  +4
> 2.40  +6
> 3.20 +10
>
> In SSB contests, if I don't get at least six unsolicited comments of
> "great audio," I'm disappointed.  It happens all the time.  Of course,
> I'm no longer 17 either.  One of these days I'll have to get Rich, NU6T,
> to trade stations with me and listen to it myself.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2012 Cal QSO Party 6-7 Oct 2012
> - www.cqp.org
>
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