[Elecraft] headphones for k3 / kx1

[Paul Christensen]

> However being that you mention the K3 you'll want to either ensure you
> use higher impedance headphones or ensure that you change the series
> caps in the headphone circuit from 10uF to 100uF.

Not too many high-end headphones will be available with an average Z of more 
than 100 ohms across the audio spectrum.  With the stock 10uF caps in the 
K3, one would need to find a set in the area of 200-ohms or so to extract 
decent low-end response.  When you get up in that Z range, the available 
headphone options quickly diminish.

Several SMD replacement caps exist for the K3's headphone coupling caps at 
C9, and C13, but Mouser P/N 647-UUD1A101MCL (made by Nichicon) is a good 
choice at only 65-cents each.

Paul, W9AC