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

[Jim Brown]

Unfortunately the guys who wrote the rules failed to understand the 
physics and the math. They were WRONG, and it is a misconception under 
which we have been laboring for as long as I've been a ham. It was Henry 
Ott who woke me up to this when I took his 3-day class on EMC around 
2003-4. Henry is a VERY smart guy, one of many who came out of Bell Labs.

73, Jim K9YC

On Tue,3/29/2016 1:28 PM, Joe Subich, W4TV 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.
>
> The standard word "paris" has 48 elements.  That makes the baud rate
> for CW (48/60) x WPM or 0.80 x WPM.
>
> ITU defines the "Necessary Bandwidth" for CW as 3 or 5 times the speed
> in bits per second (baud rate) where 3 x is for "non fading circuits"
> (where the waveform does not need to be so "sharp") and 5 x for "fading
> circuits."    See:
>     http://http://life.itu.ch/radioclub/rr/ap01.htm part B.
> The same table is found in Title 97, Part 2 of the Code of Federal
> Regulations (FCC Rules) as §2.202(g)
>
> The constant 'K' sets the minimum bandwidth needed/occupied for the two
> recognized cases.  Occupied bandwidth in excess of K=5 (or 400 Hz for
> 100 WPM) would be unacceptable due to improper keying waveforms or
> distortion in the RF stages.
>
> 73,
>
>   ... Joe, W4TV
>
>