[Elecraft] KX2 speaker/headphone question

[stan levandowski]

Bingo.  That makes sense.  I've already sketched out a little 386 amp I 
can build on a popsicle stick and tomorrow I'll dump my junkbox out on 
the kitchen table and go to work.  I guess I should start looking at the 
manual before I bother people!!


BTW, other than the volume problem I have, this little sucker REALLY 
makes the CW pop. And yes, it IS sharp.  If I'm not right on, my 
sidetone disappears!


73, Stan WB2LQF

On Mon, Feb 06, 2017 at 10:11 PM, Brian Hunt wrote:

> 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?
>>
>
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