[Amps] Maximum RF output in practical application: 4-250A

[Joe Isabella]

Better read the rules again, Joe.  Nowhere do they specify 3 kHz as "necessary BW", therefore *YOU* have chosen that value.  Go read FCC Part 2, Subpart A, subparagraph 2.1 which *does* specify necessary BW:

Necessary Bandwidth. For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of information
at the rate and with the ***quality required*** under specified conditions. (Emphasis mine).

If you can choose, so can I.  I say that 4k gives me the "quality required".  You have chosen 3k, which is fine -- feel free to operate that way, as I will continue using 4k.

Joe, N3JI

----- Original Message ----
From: "Joe Subich, W4TV" <w4tv at subich.com>
To: Joe Isabella <n3ji at yahoo.com>; amps at contesting.com
Sent: Monday, July 3, 2006 1:16:28 PM
Subject: RE: [Amps] Maximum RF output in practical application: 4-250A


> There is no verbage in Part 97 remotely resembling the term "Toll 
> Quality" in terms of SSB or AM BW.  We are allowed any SSB BW that 
> we deem as "necessary", and I say it's 4k.

Part 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.

With voice modulation, it has been proven repeatedly that 3 KHz is 
more than adequate to reasonably reproduce the human voice with 
sufficient intelligibility for communications service.  *YOU* do 
not get to determine the "necessary bandwidth."  That is determined 
by good engineering practice.  If choose to use full carrier DSB AM, 
the bandwidth necessary is no more than 6 KHz (+/- 3 KHz).  +/-5 
or +/-6 KHz is being a spectrum hog.  

73, 

   ... Joe, W4TV