[Elecraft] Re: K3 Caution when using an external monaural speaker

[wayne burdick]

Thanks for your observations on this, Todd.

Just to be safe, we recommend using a stereo plug even when only a 
single external speaker is being used. This is discussed in detail in 
the owner's manual (page 20 in the case of revision D). Just use the 
TIP contact of the plug for the speaker, leaving RING unconnected.

Of course we want to reduce the possibility of damaging the AF amp to 
zero -- even with SPKRS=2 and a mono plug. To this end, we're working 
on a very simple modification to the KIO3 audio daughter board. This 
will be the subject of a modification document soon, and is already 
being phased into production.

73,
Wayne
N6KR


TGahagan wrote:

> Most of the K3 owners probably already know this but for the benefit 
> of those that don't please be aware that you may damage the audio 
> amplifier chip on the DSP board if you enable Config Speaker 2 and 
> then plug a monaural speaker plug into the rear panel speaker jack.


---

http://www.elecraft.com