I too visited the ELAD booth, and helped demonstrate features to the curious.

For what it is worth, the Hamvention gave definite proof that all manufacturers have switched to SDR architectures, including Elecraft. They are abandoning their traditional architecture and gone entirely SDR. The new K4 has nothing in common with the K3 line.

Apart from the K4's optional superhetrodyne front end... :>) Not totally abandoning the past...

I quote "The K4HD in turn builds on the K4D and additionally offers a dual superhet module (for main and sub-receivers). Only the 8MHz IF is then sent through the ADC - the result is excellent dynamic range and excellent high-signal strength. "

<<snip>>

-- 
73
de 
paul
W9PCS

"You see, wireless telegraph is a kind of a very, very long 
cat. You pull his tail in New York and his head is 
meowing in Los Angeles. Do you understand this? 
And radio operates exactly the same way: you send 
signals here, they receive them there. The only 
difference is that there is no cat." Albert Einstein

Resistance Is Not Futile!
It's voltage divided by current.

No trees were killed in the generation of this message,
but a tremendous number of electrons were terribly 
inconvenienced

"To err is human...to really mess things up requires the 
root password."

"If you're not part of the solution, you're part of the precipitate."

You gotta have a plan or how would you know when you deviated from it...