[Elecraft] KX2 speaker/headphone question

[Brian Hunt]

Stan,
If you refer to the KX2 Block Diagram (Page 62 of my manual) you will 
see that the PH (headphone) takeoff is a low level and the SPKR(speaker) 
output has an additional amplifier associated with it.  I think Wayne 
did this to minimize the current drain when using headphones, while 
providing usable speaker volume for fixed/station powered use.  Plugging 
a resonant speaker without an amplifier into the headphone jack will 
result in the low volume that you are seeing.

At least that's the way I understand the design.  If you want viable, 
fixed KX2 operation, use a follow-on amplifier with the resonant speaker.

73,
Brian, K0DTJ

On 2/6/2017 17:47, stan levandowski wrote:
> Hi folks.  I need some assistance.  Is the KX2's headset jack "padded" 
> to protect hearing?
>
> I'm asking because I built the "CW Resonant Speaker" in the current 
> QST and it works great but the volume is so low that  it's unusable.
>
>
> Do I have to take the speaker output directly off the KX2's speaker 
> terminals to get more volume?
>