[Elecraft] Elecraft gear relative IMD

[Jim Brown]

On Thu,12/31/2015 3:07 PM, Ron D'Eau Claire wrote:
> The same is true for Ham rigs. It's perfectly okay to run an old Heathkit
> AT-1 or a 1930's homebrew rig with cathode keying today as it was back then,
> even though the keying bandwidth will be substantially greater than modern
> rigs.

WRONG!  The rule about bandwidth governs.

> The bottom line is to make sure the rig you have is being operated to
> produce the cleanest signal its design allows in the mode of operation being
> used.

The rule says NOTHING about the design of the rig. It speaks ONLY about 
the means of transmission, which refers to the communications mode (CW, 
SSB, FM, RTTY, PSK, etc.)

> That's why double-sideband amplitude modulation is still legal even though
> it requires more than twice the spectrum of an SSB signal and CW is still
> allowed even though SSB and the various digital modes provide the same
> information in yet smaller bandwidths.

WRONG. Double-sideband AM with a carrier is legal because it is a 
DIFFERENT mode permitted by the FCC Rules.  (A3 is the FCC designator). 
SSB is J3 if the carrier is suppressed. CW is A1.

73, Jim K9YC