[Boatanchors] [Glowbugs] Want to use stereo headphones w/mono audio output

Howie WA3MCK wa3mck at gmail.com
Fri Aug 25 20:58:59 EDT 2017


Stu K5KVH Pete WA2WCA Phil KO6BB Brian KA9EGW Ken WA2LBI and others...

That's what I wanted!
I'm quite familiar with shorting the tip and ring... that's easy, but, I
wanted a balanced approach.
I remember reading about this little resistive audio splitter network years
ago.
Brian and Ken offered unique information  - very cool - thanks to all !
Howie WA3MCK







On Fri, Aug 25, 2017 at 18:19 Stuart Rohre <Rohre at arlut.utexas.edu> wrote:

> Howie,
> what you need is a simple passive mixer made of three resistors.  One
> goes toward the mono source.  Carbon types 1/2 watt and maybe 1/4 W are OK.
>
> The other two connect to other end of resistor 1, and then their far
> ends go each to one of the head phone speakers. The common connection is
> carried along from source to each ground of the stereo phones.
>
> There is a formula for the resistors.
> Values depend on the impedance you have in the headphones.
>
>   I definitely know it is in the Sam's "Handbook" from the mid 1960's.
> My copy is not here, but this is a book about six inches high and 1/2
> inch thick full of useful formulas.  It had tables of pilot light bulbs,
> flash light bulbs, and other odds and ends.
>
> Maybe someone on the reflector has a copy at hand.
> Or Google the circuit called an "Audio splitter network"
>
> -Sorry I did not have complete info,
> Stuart Rohre
> K5KVH
>
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