Elecraft

MH3 mic with the K3?

Classic

List

Threaded

5 messages Options

Ron Manfredi

MH3 mic with the K3?

HNYto all!

Has anyone made an adapter cable to allow the MH-3 mic to be used with
the K-3? I acquired a KX3 with its mic, and a K-3 without a mic, and
would like to be able to use the same mic on both rigs.

Any wiring tips?

______________________________________________________________
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]

Don Wilhelm

Re: MH3 mic with the K3?

Ron,

I am not going to give you a step by step set of instructions, but the
K3 (no hyphen) manual has the pinout for the 8 pin Foster jack, and the
KX3 manual has the pinout for the MH3 mic plug.
Match up the AF lines and the shell (AF ground) with the 8 pin
connections, and match up the PTT on the MH3 plug ring 1 to the PTT pin
on the 8 pin.
The PTT return is a little more "tricky" and you should connect the MH3
ring 2 to wither pin 7 or pin 8 on the 8 pin Foster plug.

You will need to turn bias on in the K3 menu, and the UP/DN buttons on
the MH3 mic will not work - but you should have audio and PTT.

73,
Don W3FPR

On 1/1/2017 6:23 PM, Ron Manfredi wrote:
> HNYto all!
>
> Has anyone made an adapter cable to allow the MH-3 mic to be used with
> the K-3? I acquired a KX3 with its mic, and a K-3 without a mic, and
> would like to be able to use the same mic on both rigs.
______________________________________________________________
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]

Ron Manfredi

Re: MH3 mic with the K3?

Thanks, Don. I was thinking along those lines, but I wasn't sure about
the getting bias from the K3. On the Foster plug I am wiring, should
pin 6 (bias) be connected to pin 1 to supply bias?

Ron

On 1/1/2017 6:49 PM, Don Wilhelm wrote:

> Ron,
>
> I am not going to give you a step by step set of instructions, but the
> K3 (no hyphen) manual has the pinout for the 8 pin Foster jack, and
> the KX3 manual has the pinout for the MH3 mic plug.
> Match up the AF lines and the shell (AF ground) with the 8 pin
> connections, and match up the PTT on the MH3 plug ring 1 to the PTT
> pin on the 8 pin.
> The PTT return is a little more "tricky" and you should connect the
> MH3 ring 2 to wither pin 7 or pin 8 on the 8 pin Foster plug.
>
> You will need to turn bias on in the K3 menu, and the UP/DN buttons on
> the MH3 mic will not work - but you should have audio and PTT.
>
> 73,
> Don W3FPR
>
> On 1/1/2017 6:23 PM, Ron Manfredi wrote:
>> HNYto all!
>>
>> Has anyone made an adapter cable to allow the MH-3 mic to be used with
>> the K-3? I acquired a KX3 with its mic, and a K-3 without a mic, and
>> would like to be able to use the same mic on both rigs.
>

______________________________________________________________
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]

Don Wilhelm

Re: MH3 mic with the K3?

Ron,

No. Pin 6 is NOT bias, but a source of 8 volts.
Bias to the microphone is applied through a resistor, not directly from
a voltage source.
All you need to do is turn BIAS on in the MIC SEL menu. See the K3
manual for the button to tap to toggle the bias setting.

73,
Don W3FPR

On 1/1/2017 7:09 PM, Ron Manfredi wrote:
> Thanks, Don. I was thinking along those lines, but I wasn't sure
> about the getting bias from the K3. On the Foster plug I am wiring,
> should pin 6 (bias) be connected to pin 1 to supply bias?

______________________________________________________________
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]

Nr4c

Re: MH3 mic with the K3?

In reply to this post by Don Wilhelm

Or just spend the ~$70 and buy an MH2. It's already wired ready to go.

Sent from my iPhone
...nr4c. bill

> On Jan 1, 2017, at 6:49 PM, Don Wilhelm <[hidden email]> wrote:
>
> Ron,
>
> I am not going to give you a step by step set of instructions, but the K3 (no hyphen) manual has the pinout for the 8 pin Foster jack, and the KX3 manual has the pinout for the MH3 mic plug.
> Match up the AF lines and the shell (AF ground) with the 8 pin connections, and match up the PTT on the MH3 plug ring 1 to the PTT pin on the 8 pin.
> The PTT return is a little more "tricky" and you should connect the MH3 ring 2 to wither pin 7 or pin 8 on the 8 pin Foster plug.
>
> You will need to turn bias on in the K3 menu, and the UP/DN buttons on the MH3 mic will not work - but you should have audio and PTT.
>
> 73,
> Don W3FPR
>
>> On 1/1/2017 6:23 PM, Ron Manfredi wrote:
>> HNYto all!
>>
>> Has anyone made an adapter cable to allow the MH-3 mic to be used with
>> the K-3? I acquired a KX3 with its mic, and a K-3 without a mic, and
>> would like to be able to use the same mic on both rigs.
> ______________________________________________________________
> 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]