Elecraft

MH2 Mic and MKII interface

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Ricardo PY2PT

MH2 Mic and MKII interface

Dear guys,

Please, any friend use the hand mic (MH-2) with a MicrokeyerII interface?

Best Regards

Ric
PY2PT
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Joe Subich, W4TV-4

Re: MH2 Mic and MKII interface

The MH2 is an electret mic wired with a Foster plug having Elecraft's
Kenwood compatible pin assignments. The microHAM DB37-EL-K3R and
DB37-EL-K23 cable sets are configured for the Electaft/Kenwood standard
and the supplied Foster to RJ-45 adapter cable allows connecting the
MH2 to the rear panel MIC jack (RJ45).

Since the MH-2 is an electret mic and requires bias voltage on pin 1,
it is necessary to install the "electret" jumper for the RJ-45 jack
located just in front of the three trimmers in the center of the MK II
circuit board as shown in step 5 of "Preparing microKEYER II for Use" -
page 8 of the microKEYER II User Manual.

73,

... Joe Subich, W4TV
microHAM America, LLC.
http://www.microHAM-USA.com
http://groups.yahoo.com/group/microHAM

On 2/23/2013 7:25 PM, Ricardo PY2PT wrote:

> Dear guys,
>
>
> Please, any friend use the hand mic (MH-2) with a MicrokeyerII interface?
>
>
> Best Regards
>
>
>
> Ric
> PY2PT
> ______________________________________________________________
> 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
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
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Ricardo PY2PT

Re: MH2 Mic and MKII interface

Dear Joe,

I've tried both jumpers position and nothing!!!
With my kenwood hand mic everything is ok. But with the MH-2 mic (even changing the jumper position) nothing!!

Best Regards
Em 23/02/2013, às 23:31, Joe Subich, W4TV escreveu:

>
> The MH2 is an electret mic wired with a Foster plug having Elecraft's
> Kenwood compatible pin assignments. The microHAM DB37-EL-K3R and
> DB37-EL-K23 cable sets are configured for the Electaft/Kenwood standard
> and the supplied Foster to RJ-45 adapter cable allows connecting the
> MH2 to the rear panel MIC jack (RJ45).
>
> Since the MH-2 is an electret mic and requires bias voltage on pin 1,
> it is necessary to install the "electret" jumper for the RJ-45 jack
> located just in front of the three trimmers in the center of the MK II
> circuit board as shown in step 5 of "Preparing microKEYER II for Use" -
> page 8 of the microKEYER II User Manual.
>
> 73,
>
> ... Joe Subich, W4TV
> microHAM America, LLC.
> http://www.microHAM-USA.com
> http://groups.yahoo.com/group/microHAM
>
>
> On 2/23/2013 7:25 PM, Ricardo PY2PT wrote:
>> Dear guys,
>>
>>
>> Please, any friend use the hand mic (MH-2) with a MicrokeyerII interface?
>>
>>
>> Best Regards
>>
>>
>>
>> Ric
>> PY2PT
>> ______________________________________________________________
>> 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
> 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

Joe Subich, W4TV-4

Re: MH2 Mic and MKII interface

Kenwood mic does not use bias (it is dynamic). Elecraft requires
bias. Measure between pins 1 and 7 to confirm bias (2.2 to 3.3V -
industry standard for AV mics).

Also check to make sure the microphone is wired correctly - mic
ground must be on pin 7, PTT ground must be on pin 8. If the two
are reversed the mic will not receive bias. Elecraft connects
both 7 and 8 to the same ground but the mic and PTT grounds are
different in microKEYER/microKEYER II (and most other manufacturers).

73,

... Joe, W4TV

On 2/24/2013 1:05 AM, Ricardo PY2PT wrote:

> Dear Joe,
>
> I've tried both jumpers position and nothing!!!
> With my kenwood hand mic everything is ok. But with the MH-2 mic (even changing the jumper position) nothing!!
>
> Best Regards
> Em 23/02/2013, às 23:31, Joe Subich, W4TV escreveu:
>
>>
>> The MH2 is an electret mic wired with a Foster plug having Elecraft's
>> Kenwood compatible pin assignments. The microHAM DB37-EL-K3R and
>> DB37-EL-K23 cable sets are configured for the Electaft/Kenwood standard
>> and the supplied Foster to RJ-45 adapter cable allows connecting the
>> MH2 to the rear panel MIC jack (RJ45).
>>
>> Since the MH-2 is an electret mic and requires bias voltage on pin 1,
>> it is necessary to install the "electret" jumper for the RJ-45 jack
>> located just in front of the three trimmers in the center of the MK II
>> circuit board as shown in step 5 of "Preparing microKEYER II for Use" -
>> page 8 of the microKEYER II User Manual.
>>
>> 73,
>>
>> ... Joe Subich, W4TV
>> microHAM America, LLC.
>> http://www.microHAM-USA.com
>> http://groups.yahoo.com/group/microHAM
>>
>>
>> On 2/23/2013 7:25 PM, Ricardo PY2PT wrote:
>>> Dear guys,
>>>
>>>
>>> Please, any friend use the hand mic (MH-2) with a MicrokeyerII interface?
>>>
>>>
>>> Best Regards
>>>
>>>
>>>
>>> Ric
>>> PY2PT
>>> ______________________________________________________________
>>> 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
>> 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
>
>