[Elecraft] Is there a reason the receive is so Skinny

Joe Subich, W4TV lists at subich.com
Sun Apr 27 17:22:41 EDT 2014


 > I would also hope there is a time and place for more courtesy.

Including maintaining a *clean*, narrow signal that does not use
half again as much spectrum as a reasonable communications grade
signal as defined by ITU (and NTIA).

> 97.3(a)(43) Spurious emission. An emission, or frequencies outside
> the necessary bandwidth of a transmission, the level of which may be
> reduced without affecting the information being transmitted.

(SSB) Phone = 2K80J3E => Necessary bandwidth 2.8 KHz. Emissions outside
2.80 KHz = "Spurious emission"

> 97.307(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.

> 97.307 (c) All spurious emissions from a station transmitter must be
> reduced to the greatest extent practicable. If any spurious emission,
> including chassis or power line radiation, causes harmful
> interference to the reception of another radio station, the licensee
> of the interfering amateur station is required to take steps to
> eliminate the interference, in accordance with good engineering
> practice.

SSB greater than 2.8 KHz is neither "good engineering practice" nor
"necessary for the information rate and emission type being transmitted".

73,

    ... Joe, W4TV


On 4/27/2014 4:20 PM, Lynn W. Taylor, WB6UUT wrote:
> On 4/27/2014 12:30 PM, GRANT YOUNGMAN wrote:
>> The infantile fascination with SSB restricted to 300-3000 (or less) Hz
>> is nothing more than another childish, restricted bandwidth temper
>> tantrum from those who don’t know better or don’t care.
> I would also hope there is a time and place for more courtesy.
>
> Can we dial down the rhetoric?  Calling something outdated is fine.
> Infantile and Childish is a tiny bit much.
>
> 73 -- Lynn
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