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

[Don Wilhelm]

OK, I will "jump into the fray" with some of my observations and opinions.

I have heard some of the ESSB crowd maintain that they are striving for 
the best SSB signal that can be achieved within the limits of the 2.8 
kHz bandwidth.  However, the requests for audio at very low audio 
frequencies (less than 200 Hz) and highs at 4000 Hz and above cannot fit 
within a 2.8 kHz bandwidth at all.

We are to transmit using  "communications" grade rather than "broadcast 
quality".

I do hope all who are participating in ESSB are aware of the 2.8 kHz 
bandwidth limitation imposed by the regulations that you have quoted, 
but I fear that  those rules are being violated.

The FCC rules say that an amateur station is to limit the bandwidth to 
that necessary for communications, and that is generally accepted as a 
2.8 kHz bandwidth for voice communications.

For what purpose?  To sound like a broadcast station?  I do not see the 
merit in that since amateur radio should be more concerned with 
communications effectiveness which means reducing the low frequency 
content and transmitting within a 2.8 kHz bandwidth.

I will not comment on the continued use of AM which occupies twice the 
bandwidth (or more) of an SSB signal.  Certainly, the K3 does AM mode, 
but IMHO, it should not be used on HF.

How about if we banish ESSB and AM to the VHF/UHF region where there is 
ample space for wideband transmissions.  The use of those modes in the 
HF region is a waste of precious spectrum and since most of those who 
adhere to those modes seem to be running substantial power, it squeezes 
the other hams who would like to operate in that part of the spectrum of 
available space - in other words, creates unnecessary interference.

73,
Don W3FPR


On 4/27/2014 5:22 PM, Joe Subich, W4TV wrote:
>
> > 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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