[Elecraft] OT: modifying your amp for lower drive requirement

[Jim Brown]

On 12/20/2010 5:08 PM, Don Wilhelm wrote:
> The Elecraft example is that the K2
> key-clicks were not  a problem until the KPA100 was introduced.  The
> added gain of the KPA100 caused that problem to be amplified (along with
> the signal).  Elecraft responded with the Keying Waveshape Mod kit which
> corrected the situation.

Yes, and the TX phase noise from the K2/100 was not a problem until you 
used it to feed a power amp, at which time your ham neighbors started 
descending upon you. That happened to me when I moved in down the road 
from K6XX -- it took him about two days to let me know about it.  And 
Elecraft's response was more great engineering in the form of the K3.

73, Jim Brown K9YC