[Elecraft] finally installed 4.22

[Lou Kolb]

Now that 4.22 is an official release, I loaded it into my K3 4290 tonight. 
After having read so much about the APF I couldn't wait to try it.  I must 
admit, I was a bit concerned it wouldn't live up to the hype.  I needn't 
have worried.  It's everything I'd hoped it would be.  I had a Drake 2B with 
the Q-multiplier back in the day and I think the K3 implementation is even 
more effective.  It's fun to tune in a heterodyne and then tune the APF 
through the big fat peak just to get an idea of what it can do.  Many thanks 
and Kudos to the Elecraft team for a job well-done.  This is one delighted 
CW op.  Lou  WA3MIX