[Elecraft] Sp3 a/b switch

[Don Wilhelm]

Richard,

If your K3 has all the audio amplifier mods installed, there should be 
no problem.  If you have an early K3 without those mods, you could 
damage the speaker audio amplifier by driving it into an open or shorted 
load.  Yes, the A/B switch will make the load to the K3 an open circuit 
when switched to the non-K3 position.

See the listing of K3 mods to determine whether your K3 has the mods 
installed when you bought it or if they should be added.

Adding the mods is not difficult and can prevent a trip to Elecraft for 
your K3 should the audio amp fail.

73,
Don W3FPR

On 2/18/2017 10:32 AM, Richard Donner wrote:
> Hi
>     I was wondering if there is a problem using the A/B switch   on the SP3
> as a  on / off   switch for audio from the k3.  The k3 would be on.
> It seems like this would be ok but I am checking with the experts here.