K2 Use of CC1 K Heil Mic Cable

[KM4VX]

 I use the Heil CC1 K cable and a Heil mic for my K3, and it works fine. I tried the same CC1 K cable and Mic on the K2 and it does not work. I assume the Kenwood mic configuration for the K3 is correct but that is not true for the K2. Correct?  I have the Elecraft MH2 hand mic for the K2 and it works fine, so the radio is not the problem. Are the pin configurations different? Why would  Elecraft do that? I am asking if the pin configurations are different because I can't believe they are? The MH2 mic also does not work with the K3. Is that also correct? This is a little crazy guys. Thanks

[Bob Cunnings NW8L]

According to pg 13 of the K3 manual:

"MIC An Elecraft MH2, MD2, Proset-K2, or other
compatible mic can be used (see pinout below). To
select the front- or rear-panel mic, and to turn bias
on/off, use the MAIN:MIC SEL menu entry.
Bias must be turned on for electret mics (e.g. MH2,
MD2, Proset). It must be off for dynamic mics (e.g.
Heil mics using HC4 or HC5 elements)."

My MH2 hand mic works fine here with a K3.

Since the pin configuration on a K2 is adjustable, using jumpers on
the front panel, maybe it is different. The KSB2 manual has a table
explaining the jumper settings for various microphones.

Bob NW8L

On Sun, Feb 28, 2010 at 9:03 AM, KM4VX <[hidden email]> wrote:

>
>  I use the Heil CC1 K cable and a Heil mic for my K3, and it works fine. I
> tried the same CC1 K cable and Mic on the K2 and it does not work. I assume
> the Kenwood mic configuration for the K3 is correct but that is not true for
> the K2. Correct?  I have the Elecraft MH2 hand mic for the K2 and it works
> fine, so the radio is not the problem. Are the pin configurations different?
> Why would  Elecraft do that? I am asking if the pin configurations are
> different because I can't believe they are? The MH2 mic also does not work
> with the K3. Is that also correct? This is a little crazy guys. Thanks
> --
> View this message in context: http://n2.nabble.com/K2-Use-of-CC1-K-Heil-Mic-Cable-tp4649314p4649314.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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

[KM4VX]

Thank you Gary and Bob. I now understand using the menu for the K3 to turn bias on and off. Makes sense. I would not want to change the configuration of the mic socket in the K2 radio, which would then limit the use of mics and eliminate the use of the Elecraft mics. I could change the wiring of the CC1K cable, and it appears that one does not use pin six of the Kenwood mic cable for the K2 and 5 or 8v is applied to pin 5 per page 18 of the KSB2 manual. Maybe.

[Joe Subich, W4TV-4]

>  I use the Heil CC1 K cable and a Heil mic for my K3, and it
> works fine. I tried the same CC1 K cable and Mic on the K2
> and it does not work.

Which Heil microphone?  

> I have the Elecraft MH2 hand mic for the K2 and it
> works fine, so the radio is not the problem.

I presume you have installed the resistor for bias in the K2.  
If you are using a dynamic mic from Heil, the resistor must
be removed as the bias (DC) will prevent the diaphragm in the
dynamic mic from moving and reduce the already low output.  
 
> The MH2 mic also does not work with the K3. Is that also
> correct?

The MH2 works very well with the K3 but you need to turn on
the bias and set the K3 for low input gain (fP.L or rP.L).

In general, dynamic microphones can not stand the presence
of bias (DC) on the mic line and have a low level signal
(require a high gain input).  Electret mics (like the MH2,
of Heil iC elements) require bias on the mic line for their
internal preamplifier and have a high level signal (need
a low gain input to prevent overdrive/distortion).  

73,

   ... Joe, W4TV
 

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of KM4VX
> Sent: Sunday, February 28, 2010 11:03 AM
> To: [hidden email]
> Subject: [Elecraft] K2 Use of CC1 K Heil Mic Cable
>
>
>
>  I use the Heil CC1 K cable and a Heil mic for my K3, and it
> works fine. I tried the same CC1 K cable and Mic on the K2
> and it does not work. I assume the Kenwood mic configuration
> for the K3 is correct but that is not true for the K2.
> Correct?  I have the Elecraft MH2 hand mic for the K2 and it
> works fine, so the radio is not the problem. Are the pin
> configurations different? Why would  Elecraft do that? I am
> asking if the pin configurations are different because I
> can't believe they are? The MH2 mic also does not work with
> the K3. Is that also correct? This is a little crazy guys. Thanks
> --
> View this message in context:
> http://n2.nabble.com/K2-Use-of-CC1-K-Heil-Mic-Cable-tp4649314p

4649314.html
Sent from the Elecraft mailing list archive at Nabble.com.
______________________________________________________________
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

[Gary Hvizdak]

Sun Feb 28 1234 EST Ron (KM4VX) wrote ...

Thank you Gary and Bob. ... I could change the wiring of the CC1K cable ...

Hi Ron,

    For $19.75 + $5.50 S&H you can add a really clever Internal Mic Adaptor
(IMA) to your K2 which will make it a snap to change your K2 to support just
about any mic that uses an 8-pin Foster mic plug.  More than 55 mics are
supported by the IMA; the only ones that aren't are Alinco's newer mics.  
(For some reason they changed their pin-out.)

    Oh and the IMA even includes jumper selection of the required bias
resistance.

    Even if you don't feel you need an IMA, you will likely still find the
documentation useful.

73,
Gary  KI4GGX  (unpcbs.com webmaster)
K2 #4067
K3 #2724

P.S.  To learn more, please visit http://www.unpcbs.com/faq/#ima 

______________________________________________________________
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