[Elecraft] K3 - Splitting main/sub audio to 2 headphones

[Walter Underwood]

I've used this headphone distribution amp, it has jacks and pots for four listeners. $25.

http://www.amazon.com/Behringer-HA400-4-Channel-Stereo-Headphone/dp/B000KIPT30/

wunder
K6WRU

On Jun 1, 2014, at 11:29 AM, "Joe Subich, W4TV" <lists at subich.com> wrote:

> 
> On 2014-06-01 2:11 PM, Jim Brown wrote:
> > I agree with Don that it's perfectly fine to parallel two sets of
> > headphones on the output of a K3. The load impedance of most modern
> > headphones is much greater than 16 ohms.
> 
> You can't guarantee that with any two random headphones - my shack has
> headphones anywhere from 8 Ohms to 200 Ohms.  Paralleling headphones
> of with differing impedance and sensitivity will result in one operator
> getting too much or too little audio and may require gain high enough
> to result in excess distortion or dissipation.
> 
> 73,
> 
>   ... Joe, W4TV
> 
> 
> On 2014-06-01 2:11 PM, Jim Brown wrote:
>> On 6/1/2014 7:45 AM, Joe Subich, W4TV wrote:
>>>> You should have no problems with paralleling 2 headphones on the
>>>> audio output of the K3, with no need for any external mixer.
>>> 
>>> I would not risk it.  The K3 headphone amplifier is only rated for 105
>>> mW at 16 Ohms.
>> 
>> I agree with Don that it's perfectly fine to parallel two sets of
>> headphones on the output of a K3. The load impedance of most modern
>> headphones is much greater than 16 ohms.
>> 
>> 73, Jim K9YC
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--
Walter Underwood
wunder at wunderwood.org