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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