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turn off head phone monitoring

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KD8NNU

turn off head phone monitoring

Dear all,

I have my speaker output connected to a graphic equalizer to try and
improve my audio.

The problem is that I want to turn off the monitoring when transmitting
so I dont hear myself in the earphones because when transmitting on 20m
and above the equalizer is not happy and it over drives the headphones.

I turned it on this morning and now I can not find what I did so I can
turn it off.

Thanks
Don

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N5GE

Re: turn off head phone monitoring

Don,
There is no switch to turn the monitor on or off. If you don't want to here it
set it to zero.

I keep the latest version of the K3 Owner's Manual on my desk top. By using the
find function in Adobe Reader you can find most things your curious about in the
manual.

Enjoy your K3!

73,

Tom Childers
Radio Amateur N5GE
Licensed since 1976
QCWA Member 35102
ARRL Life Member

On Sun, 21 Nov 2010 18:18:09 -0500 (EST), [hidden email] wrote:

>
>Dear all,
>
>I have my speaker output connected to a graphic equalizer to try and
>improve my audio.
>
>The problem is that I want to turn off the monitoring when transmitting
>so I dont hear myself in the earphones because when transmitting on 20m
>and above the equalizer is not happy and it over drives the headphones.
>
>I turned it on this morning and now I can not find what I did so I can
>turn it off.
>
>Thanks
>Don
>
>______________________________________________________________
>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

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Amateur Radio Operator N5GE

gm3sek

Re: turn off head phone monitoring

N5GE wrote:
>There is no switch to turn the monitor on or off. If you don't want to
>here it set it to zero.
>

There are many situations such as club, contest and special event
stations where a loudspeaker is needed for RX, while the operator also
needs a low-level monitor signal into the headphones for TX.

Is there any way to switch off the monitoring feed to the speaker(s) to
avoid feedback, while leaving it available as usual in the headphones?

It is always bad practice to monitor a live microphone transmission
through a speaker, because even low levels of acoustic feedback will
affect the signal quality. The default for all voice modes should be to
mute the LS channel automatically while transmitting.

--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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Ian Maude

Re: turn off head phone monitoring

That's a really nice idea Ian :)

73 Ian
--
Ian J Maude, G0VGS
SysOp GB7MBC & HB9DRV-9 DX Clusters
Member RSGB, GQRP 9838, FISTS 14077 | K3 #455
http://www.m0scg.org.uk

On 23 November 2010 07:46, Ian White GM3SEK <[hidden email]> wrote:

> N5GE wrote:
> >There is no switch to turn the monitor on or off. If you don't want to
> >here it set it to zero.
> >
>
> There are many situations such as club, contest and special event
> stations where a loudspeaker is needed for RX, while the operator also
> needs a low-level monitor signal into the headphones for TX.
>
> Is there any way to switch off the monitoring feed to the speaker(s) to
> avoid feedback, while leaving it available as usual in the headphones?
>
> It is always bad practice to monitor a live microphone transmission
> through a speaker, because even low levels of acoustic feedback will
> affect the signal quality. The default for all voice modes should be to
> mute the LS channel automatically while transmitting.
>
>
> --
>
> 73 from Ian GM3SEK
> http://www.ifwtech.co.uk/g3sek
> ______________________________________________________________
> 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
>

N5GE

Re: turn off head phone monitoring

In reply to this post by gm3sek

Yes.

Here's how you do it...

Hold the Menu/Config button.

Turn the VFO B knob until you see SPKR + PH in the lower right hand portion of
the display.

Turn the VFO A knob until you see the setting you want (YES or no). If you set
YES you will have speaker AND Phone output. If you choose no you will only have
phone output.

Tap the Menu button to return the display back to the VFO's.

The instructions for this are on Page 20 of the Revision D7 K3 User's Manual.
Keep a copy of the latest PDF file on your desk top for quick reference. It has
a good search feature at the top just right of the center.

73,

Tom Childers
Radio Amateur N5GE
Licensed since 1976
QCWA Member 35102
ARRL Life Member

On Tue, 23 Nov 2010 07:46:01 +0000, Ian White GM3SEK <[hidden email]>
wrote:

Amateur Radio Operator N5GE

gm3sek

Re: turn off head phone monitoring

Amateur Radio Operator N5GE wrote:
>Yes.
>
>Here's how you do it...

Sorry Tom, I was changing to a different (but related) question: how to
leave the speaker on for receiving but mute the speaker when
transmitting, to avoid feedback when monitoring the outgoing
transmission?

>>
>>It is always bad practice to monitor a live microphone transmission
>>through a speaker, because even low levels of acoustic feedback will
>>affect the signal quality. The default for all voice modes should be to
>>mute the LS channel automatically while transmitting.
>

--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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M0XDF

Re: turn off head phone monitoring

In reply to this post by gm3sek

Yes, this caught me out (for I don't know how many times before) during JOTA, where I was listening with phones, while others were listening on the speaker - so monitor was on (I tend to have it up high, so when I talk, I don't shout, which I have a tendency to do).

Then I key'd the mic and howl!

Just an option to cut monitor on Tx would be good, because by then, I've usually puuled the phones of my head, to hear what people in the shack are saying.
But cutting just the monitor to speakers would be even better.
73 de M0XDF, K3 #174, P3 #108
--
Dear God, Did you mean for the giraffe to look like that or was it an
accident? -Norma [Children's Letters to God, 1991]

On 23 Nov 2010, at 07:46, Ian White GM3SEK wrote:

Joe Subich, W4TV-4

Re: turn off head phone monitoring

In reply to this post by gm3sek

> Is there any way to switch off the monitoring feed to the speaker(s)
> to avoid feedback, while leaving it available as usual in the
> headphones?

The short answer is "no." Both the headphone and speaker outputs are
derived from the same DAC and share the common audio lowpass filter.
Although the K3 headphone and speaker outputs are driven by separate
amplifiers, the operation is no different than any other transceiver
in that the audio is the same.

73,

... Joe, W4TV

On 11/23/2010 2:46 AM, Ian White GM3SEK wrote:

KK7P

Re: turn off head phone monitoring

In reply to this post by gm3sek

In a word, no. The same D to A converter that drives the headphones
drives the speaker amplifier, too. You can have both, or just
headphones, but as long as the headphones are plugged in, you can't have
speaker with no headphones.

Due to the need for "anti-pop" circuitry in the speaker amplifier, the
command from the DSP to turn it off takes a second or so. This makes it
impractical to mute on Tx but enable on Rx.

73,

Lyle KK7P

> Is there any way to switch off the monitoring feed to the speaker(s) to
> avoid feedback, while leaving it available as usual in the headphones?

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N5GE

Re: turn off head phone monitoring

In reply to this post by gm3sek

Sorry I misunderstood.

I don't believe I've ever seen a rig that would do that.

73,

Tom Childers
Radio Amateur N5GE
Licensed since 1976
QCWA Member 35102
ARRL Life Member

On Tue, 23 Nov 2010 10:45:58 +0000, Ian White GM3SEK <[hidden email]>
wrote:

>Amateur Radio Operator N5GE wrote:
>>Yes.
>>
>>Here's how you do it...
>
>Sorry Tom, I was changing to a different (but related) question: how to
>leave the speaker on for receiving but mute the speaker when
>transmitting, to avoid feedback when monitoring the outgoing
>transmission?
>
>
>>>
>>>It is always bad practice to monitor a live microphone transmission
>>>through a speaker, because even low levels of acoustic feedback will
>>>affect the signal quality. The default for all voice modes should be to
>>>mute the LS channel automatically while transmitting.
>>

Amateur Radio Operator N5GE

Phil Kane-2

Re: turn off head phone monitoring

In reply to this post by KK7P

On 11/23/2010 6:30 AM, Lyle Johnson wrote:

> Due to the need for "anti-pop" circuitry in the speaker amplifier, the
> command from the DSP to turn it off takes a second or so. This makes it
> impractical to mute on Tx but enable on Rx.

External solution:

Route the speaker through a relay NC contacts to the cable that
plugs into the external speaker jack. Activate the relay from
the PTT line that was designed to activate an external amplifier.

When all the digital/solid state circuitry just doesn't solve
the problem - build a kludge box! In the spirit of ham radio....

-- 73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

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gm3sek

Re: turn off head phone monitoring

In reply to this post by N5GE

N5GE wrote:

>>Sorry Tom, I was changing to a different (but related) question: how to
>>leave the speaker on for receiving but mute the speaker when
>>transmitting, to avoid feedback when monitoring the outgoing
>>transmission?
>
>Sorry I misunderstood.
>
>I don't believe I've ever seen a rig that would do that.
>
Ah, too bad... Many thanks to Joe and Lyle for the explanation of the
hardware limitations. Please add it to the feature list for the K4 :-)

Meanwhile, as Phil says, it's workaround time.

--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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