[Elecraft] K3: computer headset connection

[Greg - AB7R]

To be safe you should use a stereo plug.  But in actual practice a mono will work too.  I have to admit...When building my Microham cable
for the K3 I jumped the gun and used a mono plug and it works fine.

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065
K3#0009

On Thu Feb  7  0:59 , "David Ferrington, M0XDF"  sent:

>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
>> [elecraft-bounces at mailman.qth.net','','','')">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)
>
>