[Elecraft] K3: computer headset connection

[David Ferrington, M0XDF]

Hmmm - the Mic plug on the Elecraft ProSet-K2 is mono.
There is not 'Stereo' warning below the mic socket on the reap panel.

Didn't I read that the socket was designed this way, so that a mono plug can
be plugged in safely? I assume if you plug in a mono plug, the unconnected
'ring' connection on the socket just mated with the sleeve too.

ProSet works just great on rear socket.


On 7/2/08 01:35, "Greg" <ab7r at cablespeed.com> sent:

> The mic jack on the RP is a stereo jack.  You should use a stereo plug with
> audio on the tip and ground on the sleeve...nothing on the ring.
> 
> 73
> Greg
> AB7R
> 
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Dale LeStourgeon
> Sent: Wednesday, February 06, 2008 5:23 PM
> To: kw1nd at comcast.net
> Cc: elecraft
> Subject: Re: [Elecraft] K3: computer headset connection
> 
> 
> kw1nd at comcast.net wrote:
>> I'm looking for information on connecting a computer headset's boom mic to
> the K3 rear mic jack.  I've read through the archives, but it seems the
> messages either refer to making connections via the front jack (with its
> discrete pins available), or just, "I plugged it in & it worked."  I don't
> have my K3 yet to test with.  My following questions are based on the
> scenario that just plugging it in doesn't work.
>> 
>> My mic plug is stereo, so I'm assuming its an electret.  The K3's jack is
> mono, but apparently has a bias voltage available via the menu.  I'd like to
> build a "dongle" (short adapter cable) to interface the mic with the jack.
> To preserve the headset, I don't want to modify its plug or cable.
>> 
>> Does the bias voltage appear on the tip of the K3's jack?  One archived
> message indicated that at least some computer mics have both the ring & tip
> connected together; I'm at work now & can't test mine.  Would I add a
> resistor across the tip & ring lines, and add a small capacitor in-line from
> the K3's jack tip to the mic's tip to block DC?
>> 
>> Sorry for what may be a painfully obvious set of questions, but I've never
> connected anything but a regular mic to a rig before.  I plan on using the
> rear jacks to keep unnecessary cables from cluttering up the front of the
> rig.
>> 
>> 73,
>> 
>> Mike
>> KW1ND
>> _______________________________________________
>> Elecraft mailing list
>> Post to: Elecraft at mailman.qth.net
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>>  http://mailman.qth.net/mailman/listinfo/elecraft
>> 
>> Help: http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>> 
>> 
> Mike,
> I could not find out from the manual how the rear mic jack is configured
> ( whether bias is on tip or ring) but I just plugged in a computer mic
> and it works fine; and I am using a PTT foot switch. Perhaps it was just
> luck that the computer mic had the same  setup as the K3 mic jack. It
> would still be nice to know how the K3 mic jack is configured for
> tip/ring/sleeve. Getting good audio reports with the computer mic.
> Dale
> K5AJZ
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
> 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
> 
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
> 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

-- 
An old miser kept a tame jackdaw, that used to steal pieces of money, and
hide them in a hole, which a cat observing, asked, "Why he would hoard up
those round shining things that he could make no use of?" "Why," said the
jackdaw, "my master has a whole chestfull, and makes no more use of them
that I do." -Jonathan Swift, satirist (1667-1745)