[Elecraft] Multiple audio outputs for K2

Mon Apr 12 11:59:01 2004

<[email protected]> Jeff Burns AD9T asked:

> I would like to have multiple audio outputs for my K2 all hooked up at
> the  same time. One output for the computer, one for a speaker, and
> one for headphones. Ideally each output would have independent volume
> control. At least the headphone jack needs a low pass filter like the
> front panel headphone jack on the K2. 

> It seems I need an external audio breakout box with at least three
> audio outputs with individual volume controls.  To have enough drive
> for a speaker it would need an amplifier. Provision is needed for using
> both stereo and mono speakers.

> Does anyone know of a reasonably priced commercial product that would
> fit my needs? Suggestions for an elegant home brew design would also be
> appreciated. 

Hi Jeff,

PAIA Electronics offers a headphone distribution amplifier kit here:

http://www.paia.com/hda.htm

It is 6 channel stereo with individual pots for each stereo channel. 
USD $80. They also show a full page schematic if you want to start 
with that and go on your own. Basically it's twelve parallel op amps 
driving 8-600 ohm loads, low distortion. Very straightforward design. 
Standalone sloping front console, 12VDC powered. 

It's headphone output only, but you can do an amp on your own or buy 
one of the inexpensive modules, and add filters or other gingerbread 
easily.

I've been happy with PAIA kits since the mid 1970s.

Steve WA3SWS
K2 s/n 661

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Steve Uhrig, SWS Security, Maryland (USA)
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