[Elecraft] Fwd: Speakers audio is gone

[Don Wilhelm]

Gary,

It seems that that is one adapter that 'does it right'.  Many do not and 
connect the ring of the stereo plug to the sleeve when a mono jack is 
inserted, thus grounding the right channel.  That is typical of the 1/8 
inch to 1/4 inch adapters.

73,
Don W3FPR

On 12/22/2013 10:17 PM, Gary NL7Y wrote:
> Another mono/stereo speaker comment and question. Fred KE7X covers this topic
> well in his reference, as does Elecraft in their Owner's manual...to some
> extent.
>
> Above noted earlier " I have a Radio Shack P/N 274-0374 1/8" Mono Jack to
> 1/8 Stereo Plug Adapter stuck in the back of my K3. It feeds the mono plug
> to my ICOM SP 20." That particular adapter shorts the tip (left speaker
> feed) and the ring (next up the plug; right speaker feed) when a monaural
> plug is inserted.
>
> When OHM'd out the sleeve (third up the plug and metal body) sees 8 ohms
> between either the tip or ring when connected to the single monaural speaker
> (because they're shorted).
>
> Question for those that better understand the Elecraft's audio wiring: Will
> shorting the left and right speaker channels cause harm when they see the
> same 8 ohm source?
>
> 73, Gary NL7Y
>
> PS: Alternatively I can install a Radio Shack 274-375 dual mono to stereo
> adapter, or a simple stereo plug on my mono cord.
>   
>
>
>
> --
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