[Elecraft] How "clean" is a clean signal? [End of thread]

[Eric Swartz WA6HHQ - Elecraft]

Let's slow this thread down a bit and avid getting into the pro/con 'how clean 
is legal' endless arguments ;-) .

In our discussions with the FCC it is clear that they feel that the CW 
bandwidths of the current rigs on the market -are- legal (even before mods..). 
  'Good amateur practice' encompasses both the latest available technology and 
the breadth of what has been in use over the recent past.

That said, it can't hurt to improve our performance! That's why we released 
the keying mod and incorporated it into all of our latest shipping K2s.

One important point: Many times a receiver's lack of dynamic range or internal 
phase noise can create the impression a very strong signal has a wide keying 
bandwidth. Running a S9+40 signal into an IC-706 class RX will guarantee 
receiver generated artifacts that are not coming from the transmitter. Leaving 
your noise blanker on will cause even more ;-)

73, Eric   WA6HHQ
Elecraft list moderator
----------------



Ron D'Eau Claire wrote:

> Dave, W1EUY, wrote:
> I guess it's worth mentioning that some of this 'personality' is 
> illegal.
> ----------------------------------
> 
> Are you referring to 97.307 of the FCC rules Dave?
> 
> "    (a) No amateur station transmission shall occupy more bandwidth than 
> necessary for the information rate and emission type being transmitted, 
> in accordance with good amateur practice."
> 
> I am told that was left intentionally very b-r-o-a-d with the statement
> "good amateur practice" simply to AVOID prohibiting a wide range of signals
> and signal characteristics from rigs of virtually any design and age - since
> the days of spark that is. Spark transmitters ARE specifically prohibited -
> at least in the USA.  
> 
> Ron AC7AC