[Elecraft] Final Update To Keying Mod Change

[John, KI6WX]

I've posted a final update to the 180K resistor value change for the
Elecraft Keying Modification.  This update adds a new way to measure key
clicks from a transmitter.  The new method can distinguish the peak
intensity of a key click rather than the average intensity measurements that
are made with a spectrum analyzer.  This better reflects the true effect of
a key click on a receiver.

The new method also measures the peak intensity of a key click for both the
rising and falling edges of the waveform.  The measurements on the K2 show
that in some cases one edge of the keying waveform can generate 10 dB
greater intensity than the other edge.

The latest version of this document can be accessed at:

http://home.pacbell.net/johngreb/improving_elecraft_keyingmod.pdf

-John
 KI6WX