[Elecraft] [K3] Tokyo Hy-Power HL-1.2KFX amp interfacing (to ALC or not to ALC?)

[Jim Brown]

On Tue,3/29/2016 11:28 AM, Lynn W. Taylor, WB6UUT wrote:
> On 3/29/2016 10:38 AM, Jim Brown wrote:
>> WRONG! CW speed has NOTHING to do with bandwidth, which is determined 
>> by RISE and FALL times of the keying waveform and distortion in the 
>> RF stages.
> So, I can occupy zero bandwidth at 10,000 wpm CW and my occupied 
> bandwidth will be the same as 5 wpm as long as the keying waveform is 
> right?

No, because even the best rise/fall waveform has SOME harmonic content, 
and CW speeds of 10,000 WPM have no practical meaning. But you CAN 
occupy extremely narrow (a few Hz) bandwidth with a steady carrier, 
because there's nothing to excite IMD. Bandwidth would be greater than 
that only to the extent that the carrier is modulated by power supply 
noise or phase noise. And, of course, any distortion in the RF chain 
will produce harmonics.

73, Jim K9YC