[Elecraft] Variable bandwidth filter, etc

[William Carver]

Geoffrey, being brand new, I am sorting out less esoteric things in my
K3 and haven't tried to measure a filter intercept. But you can be quite
sure it is far, far higher than the second mixer so the finite filter
intercept with have no practical effect upon the in passband dynamic
range. So testing a filter isn't a high priority.

Understood your comment that you reckon the post-filter circuitry has
perhaps 80 dB of dynamic range rather than a +80 intercept, hi. 

Bill