[Boatanchors] SSB Generation - Phasing VS Filter Opinion Sought

[D C _Mac_ Macdonald]

But I believe it is "commonly-held" evaluation that frequencies above 3 kHz are NOT necessary for good amateur practice.  A rising response curve above 1 kHz (but below 3 kHz) is essential for speech comprehension, especially for older listeners whose personal detection capabilities have fallen off at the higher frequencies, with that decrease inversely proportional to frequency.

73 de Mac, K2GKK/5​
Since 30 Nov 1953​
Oklahoma City, OK​
USAF, Retired ('61-'81)​
FAA, Retired ('94-'10)
________________________________
From: Rob Atkinson <ranchorobbo at gmail.com>
Sent: Saturday, July 20, 2019 14:25
To: D C _Mac_ Macdonald
Cc: W9RAN at oneradio.net; BOATANCHORS2 LIST
Subject: Re: [Boatanchors] SSB Generation - Phasing VS Filter Opinion Sought

I see; thanks.  I found it (SSB) in Part 97 but the 2.8 kc "standard"
is found pertaining only to 60 meters.  It appears the rest of HF SSB
at least for ham is governed by a blanket rule:

§97.307 Emission standards. (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.

I believe the phasing method outside of 60 meters is therefore okay,
otherwise, all phasing rigs are probably illegal, which seems
irrational.


73
Rob
K5UJ

On Sat, Jul 20, 2019 at 12:57 PM D C _Mac_ Macdonald <k2gkk at hotmail.com> wrote:
>
> I believe it is shown in the official FCC designator for SCSS (suppressed carrier, suppressed sideband) emission.
>
> See 2K80J3E for SSB and 6K00A3 for full carrier AM modulation.