[Elecraft] SSB Filter Bandwidth Control

[William M. Spaulding, Sr.]

Folks,

I have a "how does that work" question.  After all, I think there is huge
benefit to building a K2 just from the education you are forced to get to be
a successful builder and alignment tech.

How is bandwidth control for the SSB filters accomplished.  I see NO
hardware that can alter the frequency of the filter string on the SSB board.
I may have missed something.  In OP1, the CW crystal filter is bypassed, as
I understand it.  So, what is done in software to adjust bandwidth?  Is it a
stored look-up table to change shift the BFO and adjust the VFO to
compensate for center frequency?????????  Or does the Control Board do
things at audio to change the bandwidth of the signal content you hear?

The roof won't fall in if I don't get an answer, but it will haunt me past
the grave if I don't.... ;-)

Thanks for any insight.

Bill
NA7Y