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CM 500 setings

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CM 500 setings

HI,

I'm setting up the CM 500 headset with a new to me K3 for the first time,
and having a hard time getting the anti-vox and vox gain balanced for
reliable trip without tripping every time I touch the headset or cable.

Can anyone recommend a good starting point for this?

Thanks, Scott ka9p
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Wes (N7WS)

Re: CM 500 setings

Hi Scott,

I have VOX Gain = 12, Anti-VOX = 13 and Mic Gain = 10

Regrettably, mic gain affects VOX gain. This should not be and I had the
impression that this fault was to be addressed, but it hasn't been AFAIK.

So set your mic gain to what works for you before proceeding.

Hope this helps.

Wes

On 10/21/2015 7:44 AM, Scott via Elecraft wrote:

> HI,
>
> I'm setting up the CM 500 headset with a new to me K3 for the first time,
> and having a hard time getting the anti-vox and vox gain balanced for
> reliable trip without tripping every time I touch the headset or cable.
>
> Can anyone recommend a good starting point for this?
>
> Thanks, Scott ka9p
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>

Dave Hachadorian-2

Re: CM 500 setings

If you are using a headset, rather than a loudspeaker, you can
set antivox = 000.

Mine has been sitting at zero for years. I never even looked at
it before today. I never use a speaker.

Dave Hachadorian, K6LL
Yuma, AZ

-----Original Message-----
From: Wes (N7WS)
Sent: Wednesday, October 21, 2015 2:18 PM
To: [hidden email]
Subject: Re: [Elecraft] CM 500 setings

Hi Scott,

I have VOX Gain = 12, Anti-VOX = 13 and Mic Gain = 10

Regrettably, mic gain affects VOX gain. This should not be and I
had the
impression that this fault was to be addressed, but it hasn't
been AFAIK.

So set your mic gain to what works for you before proceeding.

Hope this helps.

Wes

On 10/21/2015 7:44 AM, Scott via Elecraft wrote:

> HI,
> I'm setting up the CM 500 headset with a new to me K3 for the
> first time,
> and having a hard time getting the anti-vox and vox gain
> balanced for
> reliable trip without tripping every time I touch the headset
> or cable.
> Can anyone recommend a good starting point for this?
> Thanks, Scott ka9p
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>

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Bob McGraw - K4TAX

Re: CM 500 setings

In reply to this post by Elecraft mailing list

I'd start with the anti-VOX value at 0. Then speaking normally with the
headset boom about 1" to 2" from your mouth, advance the VOX Gain until
you get reliable keying. Then advance the anti-VOX gain to about 10.
The purpose of the anti-VOX circuit is to prevent the received audio
coming from the speaker or the headphones from tripping the VOX. Since
you are using a headset, there is very little signal getting from the
headphones to the mike. To adjust the VOX delay or hang time, it is
set with the DELAY {see page 14} Also see page 31 and 56 of the manual.
Too high of anti-VOX level typically will cause false action of the VOX
circuit. The objective is to run both the VOX gain and anti-VOX values
as low as practical yet maintain reliable keying. Also make sure the
DELAY is not too short that causes the VOX to un-key during syllables or
between words or phrases.

Adjustment is a simple process if you start from the beginning. Also,
the mike-to-mouth position must be the identical place each time in
order for the VOX to work reliably. If you change from listening with
headphones to the speaker, either internal or external, the the anti-VOX
value will require changing. This will then require the VOX Gain to be
changed as well.

73
Bob, K4TAX

On 10/21/2015 9:44 AM, Scott via Elecraft wrote:
> HI,
>
> I'm setting up the CM 500 headset with a new to me K3 for the first time,
> and having a hard time getting the anti-vox and vox gain balanced for
> reliable trip without tripping every time I touch the headset or cable.
>
> Can anyone recommend a good starting point for this?
>
> Thanks, Scott ka9p

______________________________________________________________
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Wes (N7WS)

Re: CM 500 setings

In reply to this post by Dave Hachadorian-2

I always use a headset but sometimes use both the headphones and speaker if a
guest is in the shack and needs to hear the other station. Hence the need for
anti-vox even with a headset.

Gad, just realized there is not hand or stand mic in the shack and no way to use
PTT.

On 10/21/2015 2:23 PM, Dave Hachadorian wrote:

> If you are using a headset, rather than a loudspeaker, you can set antivox = 000.
>
> Mine has been sitting at zero for years. I never even looked at it before
> today. I never use a speaker.
>
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>

Bob McGraw - K4TAX

Re: CM 500 setings

Sure there is an available PTT ........ just push XMIT on the radio.

73
Bob, K4TAX

On 10/21/2015 6:00 PM, Wes (N7WS) wrote:
> I always use a headset but sometimes use both the headphones and
> speaker if a guest is in the shack and needs to hear the other
> station. Hence the need for anti-vox even with a headset.
>
> Gad, just realized there is not hand or stand mic in the shack and no
> way to use PTT.

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Elecraft mailing list

Re: CM 500 setings

In reply to this post by Wes (N7WS)

Another route is the PTT jack in the rear. Most often used with a foot switch, but any switch to ground will work.

W3OU Steve

-----Original Message-----
From: Wes (N7WS) <[hidden email]>
To: elecraft <[hidden email]>
Sent: Wed, Oct 21, 2015 7:02 pm
Subject: Re: [Elecraft] CM 500 setings

I always use a headset but sometimes use both the headphones and speaker if a

guest is in the shack and needs to hear the other station. Hence the need for

anti-vox even with a headset.

Gad, just realized there is not hand or stand
mic in the shack and no way to use
PTT.

On 10/21/2015 2:23 PM, Dave
Hachadorian wrote:
> If you are using a headset, rather than a loudspeaker, you
can set antivox = 000.
>
> Mine has been sitting at zero for years. I never
even looked at it before
> today. I never use a speaker.
>
>
> Dave
Hachadorian, K6LL
> Yuma,
AZ
>
>

______________________________________________________________
Elecraft
mailing list
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http://mailman.qth.net/mmfaq.htm
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list hosted by: http://www.qsl.net
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Jim Brown-10

Re: CM 500 setings

In reply to this post by Wes (N7WS)

On Wed,10/21/2015 2:18 PM, Wes (N7WS) wrote:
> Regrettably, mic gain affects VOX gain. This should not be and I had
> the impression that this fault was to be addressed, but it hasn't been
> AFAIK.

Actually, that's very logical flow, and is common to lots of audio gear,
and it's what I would design if I were doing it. Thinking in analog
terms, first there's a mic preamp with a sensitivity setting (in this
case, Mic H or L), then an output gain setting, then stuff that uses the
mic signal. The good part is that once mic sensitivity, mic gain, and
VOX are set for one mic, they should not need adjustment for another,
because the mic gain setting would be readjusted for that second mic.

73, Jim K9YC
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Wes (N7WS)

Re: CM 500 setings

In reply to this post by Bob McGraw - K4TAX

That's not a real PTT switch, that's a way to push the radio off the desk, or
put it in tune.

On 10/21/2015 4:19 PM, Bob McGraw - K4TAX wrote:

> Sure there is an available PTT ........ just push XMIT on the radio.
>
> 73
> Bob, K4TAX
>
> On 10/21/2015 6:00 PM, Wes (N7WS) wrote:
>> I always use a headset but sometimes use both the headphones and speaker if a
>> guest is in the shack and needs to hear the other station. Hence the need
>> for anti-vox even with a headset.
>>
>> Gad, just realized there is not hand or stand mic in the shack and no way to
>> use PTT.
>
>

Wes (N7WS)

Re: CM 500 setings

In reply to this post by Jim Brown-10

Well, just like in our politics, we're going to have to disagree on this one.

I actually discovered this,and reported it here a while ago, when trying to set
up my K3S for RTTY using the new USB/internal sound card and VOX. See:
http://elecraft.365791.n2.nabble.com/Mic-VOX-interaction-td7606353.html

Wayne wrote that one of their engineers had also discovered the issue and it was
to be moved up the list.

Still waiting.

On 10/21/2015 9:38 PM, Jim Brown wrote:

> On Wed,10/21/2015 2:18 PM, Wes (N7WS) wrote:
>> Regrettably, mic gain affects VOX gain. This should not be and I had the
>> impression that this fault was to be addressed, but it hasn't been AFAIK.
>
> Actually, that's very logical flow, and is common to lots of audio gear, and
> it's what I would design if I were doing it. Thinking in analog terms, first
> there's a mic preamp with a sensitivity setting (in this case, Mic H or L),
> then an output gain setting, then stuff that uses the mic signal. The good
> part is that once mic sensitivity, mic gain, and VOX are set for one mic, they
> should not need adjustment for another, because the mic gain setting would be
> readjusted for that second mic.
>
> 73, Jim K9YC
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>