[Elecraft] K3 x K3S - Is There a Difference from an Operational Standpoint?

[Jim Brown]

On 1/5/2026 10:50 AM, Michael Crestohl via Elecraft wrote:
> Is there any significant difference in the operational features between the K3 and the K3S?
> The reason I ask is that I have a K3S and have been looking for a Nifty Guide for it without success.  I was offered a Nifty Guide for the K3 and I am wondering if the two models hand similar operating features since they appear to have the same controls.
> Thanks for the help.

With respect to the user interface, very little difference. The K3S 
added a USB port that simplified cabling for computer interface, 
integrated a second  preamp for the higher bands that was an accessory 
for the K3. Other differences were improvements in some of the circuitry 
that improved receiver performance in weak signal and crowded band 
conditions (a new motherboard and new synth boards).

73, Jim K9YC