[Elecraft] K3 - 250 Hz and 400 Hz Filter Settings

[Lyle Johnson]

> RTTY tones have sidebands, and since the Tx logic is not usually shaped
> to move optimally between the tones, but instead tends to switch
> abruptly, each tone has sidebands beyond the minimum necessary.

I should add that most systems, including the K3, use phase-continuous 
tone switching to reduce the switching transient.

73,

Lyle KK7P