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Questions on Yamaha CM-500 boom headset with K3

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Jon Zaimes AA1K

Questions on Yamaha CM-500 boom headset with K3

Just bought one of these boom mic-headsets and plan to use with my K3's.

Is the battery bias supply included with the headset needed?

And do I need to adapt the microphone's 3-conductor mini phone plug to a
2-conductor before plugging into the K3 rear-panel mic input?

Thanks any help ....

73/Jon AA1K
www.aa1k.us

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Don Wilhelm-4

Re: Questions on Yamaha CM-500 boom headset with K3

Jon,

Just plug it in, turn bias on and set the Mic gain range to L (low) -
the microphone is quite sensitive. (MIC SEL RP.L bias)
You do not need the battery on the K3, but hang onto it, you may need it
with another transceiver that does not supply bias internally.

73,
Don W3FPR

On 2/28/2013 9:00 AM, Jon Zaimes AA1K wrote:
> Just bought one of these boom mic-headsets and plan to use with my K3's.
>
> Is the battery bias supply included with the headset needed?
>
> And do I need to adapt the microphone's 3-conductor mini phone plug to a
> 2-conductor before plugging into the K3 rear-panel mic input?
>
> Thanks any help ....
>

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Rick Robinson

Re: Questions on Yamaha CM-500 boom headset with K3

In reply to this post by Jon Zaimes AA1K

This may be apples to oranges, but, I use a Pyle headset with my kx3 and
mine works with or without mic bias. But.... if I have the mic bias off the
radio goes into scan mode. Don't know why. Just thought I'd mention this in
case your K3 acts the same way....Rick

On Thu, Feb 28, 2013 at 9:00 AM, Jon Zaimes AA1K <[hidden email]> wrote:

> Just bought one of these boom mic-headsets and plan to use with my K3's.
>
> Is the battery bias supply included with the headset needed?
>
> And do I need to adapt the microphone's 3-conductor mini phone plug to a
> 2-conductor before plugging into the K3 rear-panel mic input?
>
> Thanks any help ....
>
> 73/Jon AA1K
> www.aa1k.us
>
> ______________________________**______________________________**__
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Don Wilhelm-4

Re: Questions on Yamaha CM-500 boom headset with K3

Rick,

I would wager that your microphone ties the tip and ring together. If
you look at the 'pinout' for the KX3 microphone (page 5 of the manual)
you will see that Ring 1 is PTT/UP/DN. If that pin is grounded, it is
the PTT function, but if there is a resistance to ground on that ring,
you will have either the UP or DN function depending on the value of the
resistor.
Apparently the voltage introduced by applying bias is causing your KX3
to interpret that level as either UP or DN (and it keeps repeating).

If you turn off bias, the the 'bias' voltage is supplied by the residual
voltage from the PTT/UP/DN detection circuit in the KX3. Although that
works, the voltage source being used for that bias is sufficient for the
microphone element, but it is 'dirty logic voltage' which can give you
noise in the microphone input. Turning on the KX3 Noise Gate can help
reduce that noise.

I built an adapter for my CM-500 (which also connects the tip and ring
together) to eliminate that connection - one can use a stereo jack and a
stereo plug with the tip of the jack connected to the tip of the plug
and the shells connected together (no connection to the ring). I built
my adapter with a 4 circuit plug and brought out the logic ground
(ring2) and ring1 to a switch that I use for PTT, but that is not a
requirement, just my desire.

BTW, tying the ring and tip together is not a problem for the K3 because
the K3 jack has no connection to the ring (that is why it is marked
"Mono" - the jack is actually stereo.

73,
Don W3FPR

On 2/28/2013 9:15 AM, Rick Robinson wrote:
> This may be apples to oranges, but, I use a Pyle headset with my kx3 and
> mine works with or without mic bias. But.... if I have the mic bias off the
> radio goes into scan mode. Don't know why. Just thought I'd mention this in
> case your K3 acts the same way....Rick
>

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Rick Robinson

Re: Questions on Yamaha CM-500 boom headset with K3

I will check that out this evening. I also will check out what happens when
I turn off the up/dn function in the menu. Currently it is on. My audio
output is very clean. My local friends have scrutinized the audio and said
it is excellent. I appreciate the input. I'll get back on my findings.

On Thu, Feb 28, 2013 at 9:41 AM, Don Wilhelm <[hidden email]> wrote:

> Rick,
>
> I would wager that your microphone ties the tip and ring together. If you
> look at the 'pinout' for the KX3 microphone (page 5 of the manual) you will
> see that Ring 1 is PTT/UP/DN. If that pin is grounded, it is the PTT
> function, but if there is a resistance to ground on that ring, you will
> have either the UP or DN function depending on the value of the resistor.
> Apparently the voltage introduced by applying bias is causing your KX3 to
> interpret that level as either UP or DN (and it keeps repeating).
>
> If you turn off bias, the the 'bias' voltage is supplied by the residual
> voltage from the PTT/UP/DN detection circuit in the KX3. Although that
> works, the voltage source being used for that bias is sufficient for the
> microphone element, but it is 'dirty logic voltage' which can give you
> noise in the microphone input. Turning on the KX3 Noise Gate can help
> reduce that noise.
>
> I built an adapter for my CM-500 (which also connects the tip and ring
> together) to eliminate that connection - one can use a stereo jack and a
> stereo plug with the tip of the jack connected to the tip of the plug and
> the shells connected together (no connection to the ring). I built my
> adapter with a 4 circuit plug and brought out the logic ground (ring2) and
> ring1 to a switch that I use for PTT, but that is not a requirement, just
> my desire.
>
> BTW, tying the ring and tip together is not a problem for the K3 because
> the K3 jack has no connection to the ring (that is why it is marked "Mono"
> - the jack is actually stereo.
>
> 73,
> Don W3FPR
>
>
> On 2/28/2013 9:15 AM, Rick Robinson wrote:
>
>> This may be apples to oranges, but, I use a Pyle headset with my kx3 and
>> mine works with or without mic bias. But.... if I have the mic bias off
>> the
>> radio goes into scan mode. Don't know why. Just thought I'd mention this
>> in
>> case your K3 acts the same way....Rick
>>
>>
>

Nate Bargmann

Re: Questions on Yamaha CM-500 boom headset with K3

In reply to this post by Don Wilhelm-4

If Don doesn't mind me following on...

If, like me, you don't use a headset all the time, I use a desk mic most
of the time, a stereo extension cable plugged into the K3's rear panel
mic jack and brought to the front of the radio (I just coil it up
underneath) makes connecting it a breeze. I do likewise with a
footswitch cable to the rear jack. I don't like reaching back there and
fishing for jacks any more than I have to!

73, de Nate, N0NB >>

--

"The optimist proclaims that we live in the best of all
possible worlds. The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us
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Don Wilhelm-4

Re: Questions on Yamaha CM-500 boom headset with K3

Nate,

You actually can leave the headset plugged into the back of the K3 and
the desk mic plugged into the front.
Change the one that is active with the MIC SEL menu. No extension cord
required, and no fishing for the jacks.

73,
Don W3FPR

On 2/28/2013 1:08 PM, Nate Bargmann wrote:

> If Don doesn't mind me following on...
>
> If, like me, you don't use a headset all the time, I use a desk mic most
> of the time, a stereo extension cable plugged into the K3's rear panel
> mic jack and brought to the front of the radio (I just coil it up
> underneath) makes connecting it a breeze. I do likewise with a
> footswitch cable to the rear jack. I don't like reaching back there and
> fishing for jacks any more than I have to!
>
>

George Danner

Re: Questions on Yamaha CM-500 boom headset with K3

Nate,
For What it is Worth:
Might want to select microphones with a Macro if the sensitivity and/or
response is very different between the two microphones.
I need to select H or L gain and different Mic Gain settings for my 2
microphones.

I use PF1 for the front mic & PF2 for the rear mic.

George
AI4VZ

-----Original Message-----
From: Don Wilhelm

Nate,

You actually can leave the headset plugged into the back of the K3 and
the desk mic plugged into the front.
Change the one that is active with the MIC SEL menu. No extension cord
required, and no fishing for the jacks.
html

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Nate Bargmann

Re: Questions on Yamaha CM-500 boom headset with K3

In reply to this post by Don Wilhelm-4

* On 2013 28 Feb 14:00 -0600, Don Wilhelm wrote:
> Nate,
>
> You actually can leave the headset plugged into the back of the K3
> and the desk mic plugged into the front.
> Change the one that is active with the MIC SEL menu. No extension
> cord required, and no fishing for the jacks.

Of course I *could* but I chose this method as I can then put the
headset away and clear some desk clutter.

73, de Nate, N0NB >>

--

"The optimist proclaims that we live in the best of all
possible worlds. The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us
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Nate Bargmann

Re: Questions on Yamaha CM-500 boom headset with K3

In reply to this post by George Danner

* On 2013 28 Feb 14:13 -0600, GDanner wrote:
> Nate,
> For What it is Worth:
> Might want to select microphones with a Macro if the sensitivity and/or
> response is very different between the two microphones.

Already done right after I determined the settings needed for the
CM-500. :-)

73, de Nate, N0NB >>

--

"The optimist proclaims that we live in the best of all
possible worlds. The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us
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Rick Robinson

Re: Questions on Yamaha CM-500 boom headset with K3

In reply to this post by Rick Robinson

If I turn off the up/down in the menu then the radio stays on its
frequency, regardless of using mic bias or not. More research to come.

On Thu, Feb 28, 2013 at 8:58 PM, Jon Zaimes AA1K <[hidden email]> wrote:

> thanks Rick!
>
> On 2/28/2013 9:15 AM, Rick Robinson wrote:
>
> This may be apples to oranges, but, I use a Pyle headset with my kx3 and
> mine works with or without mic bias. But.... if I have the mic bias off the
> radio goes into scan mode. Don't know why. Just thought I'd mention this in
> case your K3 acts the same way....Rick
>
> On Thu, Feb 28, 2013 at 9:00 AM, Jon Zaimes AA1K <[hidden email]> wrote:
>
>> Just bought one of these boom mic-headsets and plan to use with my K3's.
>>
>> Is the battery bias supply included with the headset needed?
>>
>> And do I need to adapt the microphone's 3-conductor mini phone plug to a
>> 2-conductor before plugging into the K3 rear-panel mic input?
>>
>> Thanks any help ....
>>
>> 73/Jon AA1K
>> www.aa1k.us
>>
>> ______________________________________________________________
>> 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
>>
>
>
>

Eric Buggee; VK3AX

Re: Questions on Yamaha CM-500 boom headset with K3

Hi All,
Re Yamaha CM500 Headset with electret boom microphone.
The Battery Bias box as mentioned is supplied with the CM500 headset.

If used with the K3 the bias for the CM500 is supplied by the
appropriate setting parameters as detailed in the K3 handbook and it is
an excellent compliment to the K3.

You Just plug the respective CM500 plugs into the rear panel jacks
labelled Mic & Phones & set Mic Bias On as per procedure in K3 handbook.

73 from,

Eric VK3AX.

On 3/1/2013 1:16 PM, Rick Robinson wrote:

> If I turn off the up/down in the menu then the radio stays on its
> frequency, regardless of using mic bias or not. More research to come.
>
> On Thu, Feb 28, 2013 at 8:58 PM, Jon Zaimes AA1K <[hidden email]> wrote:
>
>> thanks Rick!
>>
>> On 2/28/2013 9:15 AM, Rick Robinson wrote:
>>
>> This may be apples to oranges, but, I use a Pyle headset with my kx3 and
>> mine works with or without mic bias. But.... if I have the mic bias off the
>> radio goes into scan mode. Don't know why. Just thought I'd mention this in
>> case your K3 acts the same way....Rick
>>
>> On Thu, Feb 28, 2013 at 9:00 AM, Jon Zaimes AA1K <[hidden email]> wrote:
>>
>>> Just bought one of these boom mic-headsets and plan to use with my K3's.
>>>
>>> Is the battery bias supply included with the headset needed?
>>>
>>> And do I need to adapt the microphone's 3-conductor mini phone plug to a
>>> 2-conductor before plugging into the K3 rear-panel mic input?
>>>
>>> Thanks any help ....
>>>
>>> 73/Jon AA1K
>>> www.aa1k.us
>>>
>>> ______________________________________________________________
>>> 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
>>>
>>
>>
> ______________________________________________________________
> Elecraft mailing list
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>
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> Please help support this email list: http://www.qsl.net/donate.html
>

Jon Zaimes AA1K

Re: Questions on Yamaha CM-500 boom headset with K3

Many thanks to all for the tips. Got it going FB. CU in the contest this
weekend.

73/Jon AA1K
www.aa1k.us

On 2/28/2013 10:23 PM, Eric Buggee wrote:

> Hi All,
> Re Yamaha CM500 Headset with electret boom microphone.
> The Battery Bias box as mentioned is supplied with the CM500 headset.
>
> If used with the K3 the bias for the CM500 is supplied by the
> appropriate setting parameters as detailed in the K3 handbook and it
> is an excellent compliment to the K3.
>
> You Just plug the respective CM500 plugs into the rear panel jacks
> labelled Mic & Phones & set Mic Bias On as per procedure in K3 handbook.
>
> 73 from,
>
> Eric VK3AX.
>
>
>
>
> On 3/1/2013 1:16 PM, Rick Robinson wrote:
>> If I turn off the up/down in the menu then the radio stays on its
>> frequency, regardless of using mic bias or not. More research to come.
>>
>> On Thu, Feb 28, 2013 at 8:58 PM, Jon Zaimes AA1K <[hidden email]>
>> wrote:
>>
>>> thanks Rick!
>>>
>>> On 2/28/2013 9:15 AM, Rick Robinson wrote:
>>>
>>> This may be apples to oranges, but, I use a Pyle headset with my kx3
>>> and
>>> mine works with or without mic bias. But.... if I have the mic bias
>>> off the
>>> radio goes into scan mode. Don't know why. Just thought I'd mention
>>> this in
>>> case your K3 acts the same way....Rick
>>>
>>> On Thu, Feb 28, 2013 at 9:00 AM, Jon Zaimes AA1K <[hidden email]>
>>> wrote:
>>>
>>>> Just bought one of these boom mic-headsets and plan to use with my
>>>> K3's.
>>>>
>>>> Is the battery bias supply included with the headset needed?
>>>>
>>>> And do I need to adapt the microphone's 3-conductor mini phone plug
>>>> to a
>>>> 2-conductor before plugging into the K3 rear-panel mic input?
>>>>
>>>> Thanks any help ....
>>>>
>>>> 73/Jon AA1K
>>>> www.aa1k.us
>>>>
>>>> ______________________________________________________________
>>>> 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
>>>>
>>>
>>>
>> ______________________________________________________________
>> Elecraft mailing list
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>>
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>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>

Dominic Baines-2

SB boom headset with K3

In reply to this post by Eric Buggee; VK3AX

After managing with an even cheaper headset for my KX3 I bought a set of
the Koss SB45 gaming headphones recently for use with it and the over
ear comfort is brilliant. Even on long sessions you do not seem to get
that sticky/clammy ear with some 'tank commander' type headsets give you.

I have a K2 coming shortly and whilst it will be used for cw it will
have the SSB option fitted and would like to use the same mic. I note
the mic socket is 8 pin and has PTT. I assume I will have to fit the 5k6
bias resistor between the pins 1 and 6 of the mic socket on the rig.

Is there a 'commercial' adapter that contains the 8 pin plug, with bias
resistor fitted and a 3.5mm socket for the headset and a hand or floor
PTT switch? I can home-brew something for the hand held PTT easily
enough (bit like a weather man/girl hand switch they use as they stand
in front of the green screens) but just wondered.

72

Dom
M1KTA
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Jim Brown-10

Re: SB boom headset with K3

On 4/29/2013 9:18 AM, Dominic Baines wrote:
>
> I have a K2 coming shortly and whilst it will be used for cw it will
> have the SSB option fitted and would like to use the same mic. I note
> the mic socket is 8 pin and has PTT. I assume I will have to fit the
> 5k6 bias resistor between the pins 1 and 6 of the mic socket on the rig.

Yes, and which pins get the resistor will depend on how the K2 mic jack
was wired by the builder -- as I recall, build instructions are given to
configure it for mics wired for use with Icom, Kenwood, Yaesu, and other
rigs, all of which are different from each other. :) The basic
instruction is, a resistor in the range of 5K ohms, value not very
critical, between +DC and the mic input pin.

There are mods to the K2, some of them quite simple, that can improve
SSB TX performance. Most are on the Elecraft website, and I developed a
simple one myself that I should write up but have not. It involves
changing a coupling capacitor to roll off the low frequency response and
changing a few resistor values to add a few dB gain so that you can hit
the peak limiter harder and gain more advantage from it.

Good to hear that the Koss headset works well, and I'm not surprised.

73, Jim K9YC
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