On 2/16/2026 3:15 PM, Phil Hystad via Elecraft wrote:
Can someone give pointers on this?
The K3, K3S, and K4 have separate audio power amplifiers for headphones
and speakers, each with their own individual output jacks. I haven't
studied the schematic, but I suspect that the KX3 has only the
amplifiers for headphones. Speakers require considerably more power.
The headphone output could probably drive a powered speaker (that is,
one with its own built-in amplifier), but powered speakers are
notoriously bad for RFI, both generating noise and being susceptible to
nearby transmitters, so are unlikely to be a solution.
73, Jim K9YC
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