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RX eq

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Arthur Nienhouse

RX eq

Agreed ... sure would like a command that could be used within a macro to
change the RX EQ settings, like the one for transmit EQ.

I do this with k3_ez with the eq page I have set to save several different settings that can be sent to the k3 with a click of send to.
I have labeled a couple of different settings to *save* in the k3_ez program it only takes a moment to send all 8 settings to the k3 eq.

This works for both RX eq and TX eq

Regards
Art
ka9zap

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N5GE

Re: RX eq

Can anyone tell me what the benefits of TX equalization are?

73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member

"Farmers have learned that rotating crops improves
productivity and saves the land. Voters should
improve productivity and save OUR LAND by
rotating politicians at the ballot box."
-- Otis Mukinfus --

On Sat, 18 Feb 2012 09:32:04 -0600, Art Nienhouse <[hidden email]> wrote:

[snip]

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Amateur Radio Operator N5GE

Mike Reublin

Re: RX eq

In reply to this post by Arthur Nienhouse

I'm curious. Once set, why would you change eq settings, especially receive?

73, Mike NF4L

On 2/18/2012 10:32 AM, Art Nienhouse wrote:

> Agreed ... sure would like a command that could be used within a macro to
> change the RX EQ settings, like the one for transmit EQ.
>
> I do this with k3_ez with the eq page I have set to save several different settings that can be sent to the k3 with a click of send to.
> I have labeled a couple of different settings to *save* in the k3_ez program it only takes a moment to send all 8 settings to the k3 eq.
>
> This works for both RX eq and TX eq
>
> Regards
> Art
> ka9zap
>
>
> ______________________________________________________________
> Elecraft mailing list
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k6dgw

Re: RX eq

On 2/18/2012 11:11 AM, Mike wrote:
> I'm curious. Once set, why would you change eq settings, especially receive?

Different modes. I have a group of settings I use for SSB that attempt
to emulate the program in my hearing aids. Not near enough for me but
it's sure better than nothing. If I set the lows for -16, I can set the
higher frequencies up to + 16, turn up the overall gain, and get about
32 db of net equalization [Thanks for that idea from K9YC]. 3 times
that would be perfect, but I can understand SSB on my K3 that I can't on
the FT-847.

For CW, I try to get a peak around my sidetone [570 Hz] and roll the
rest off to lower the perceived noise a little. It makes a difference.

If I had a cable from the radio to the miniscule sockets the use to
program my hearing aids, I wouldn't need the RX EQ :-)

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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Joe Subich, W4TV-4

Re: RX eq

In reply to this post by N5GE

> Also, "communications" type dynamic microphones often have rather
> uneven response curves. Some I've seen have way too much response
> below 500 or 600 Hz. The equalizer can be used to compensate for this
> response.

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.

Low frequencies contribute very little to intelligibility but consume
a lot of transmitter power.

73,

... Joe, W4TV

On 2/18/2012 12:47 PM, Ron D'Eau Claire wrote:

> In radio communications, it's been long understood that a male voice sounds
> best with an audio response the rises in output gradually to about 2.5 kHz
> before falling off again.
>
> The equalization controls allow you to adjust this response.
>
> Modern condenser electrets mics are usually flat from 100 Hz or so to out
> over 15 kHz. The filters in the rig take care of suppressing the very low
> and high frequencies and the equalizer is used to "shape" the response curve
> in the transmitted audio range to suit your voice.
>
> Also, "communications" type dynamic microphones often have rather uneven
> response curves. Some I've seen have way too much response below 500 or 600
> Hz. The equalizer can be used to compensate for this response.
>
> And the XYs out there have a whole different voice. Actually, most of them
> have a naturally better response curve but there are still a lot of
> variations that the equalizer can help with.
>
> 73, Ron AC7AC
>
> -----Original Message-----
>
> Can anyone tell me what the benefits of TX equalization are?
>
> 73,
> Tom
> Amateur Radio Operator N5GE
> ARRL Lifetime Member
> QCWA Lifetime Member
>
>
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k6dgw

Re: RX eq

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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Joe Subich, W4TV-4

Re: RX eq

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
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

k6dgw

Re: RX eq

Well, you and Jim seem to move in the same audio circles. I think you
may be right, more the derivatives than the actual numbers, but mine
sure work good. I will confess, I had no idea what to do with all these
TX and RX EQ #'s without help from my Elmer.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org

On 2/18/2012 5:26 PM, Joe Subich, W4TV wrote:
>
> 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 ...

> 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

k6dgw

Re: RX eq

In reply to this post by k6dgw

Ron: Whatever made you think this was an "unwanted" effect? :-) I
loved it as soon as I figured it out! [Pgm Mgr didn't all that much but
it was 0600 and he wasn't awake yet]. I loved it, Johnny Cash wasn't
quite as famous then but he's the first person I can think of that I was
trying to sound like ... deep baritone base -- 17 yr old, and it never
came without that mic. I was careful not to cough directly into it, it
could have torn the ribbon out.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org

On 2/18/2012 6:48 PM, Ron D'Eau Claire wrote:
> This unwanted effect is largely avoided by using a communications mic
> correctly - speaking *across* the front of it, not into it.

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Terry Schieler

Re: RX eq

In reply to this post by k6dgw

Yep, Fred. During my music career a mic's "proximity effect" (close talk) was perfect to enhance a vocal with that special Big Bopper or Elvis bottom end. And, think Righteous Brothers too....."You never close your eyes......" rattled the walls. Sure 55's and SM-58's were ideal for that. And if you ever saw George Carlin live........the proximity effect was his trademark accent to any point he wanted to drive home.

Ah, the good old days.

Terry, W0FM

-----Original Message-----
From: Ron D'Eau Claire [mailto:[hidden email]]
Sent: Saturday, February 18, 2012 8:48 PM
To: 'Elecraft Reflector'
Subject: Re: [Elecraft] RX eq

This unwanted effect is largely avoided by using a communications mic correctly - speaking *across* the front of it, not into it. A boom mic that will reach the front of your face should be positioned *below* your mouth.
Note that most newer boom mics stop short of the mouth. That automatically ensures you won't talk into it.

Ron AC7AC

-----Original Message-----

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...
.

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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