[Boatanchors] SSB Generation - Phasing VS Filter Opinion Sought

[Robert Downs]

Assuming that you don't overdrive any stage after the filter, the RF and therefore audio bandwidth of a filter rig is set by the filter.  So even if you are using a HI-FI audio system, neither the HI nor the FI will get past the filter.

Assuming that the phasing network is broad band enough, and again that you don't overdrive anything, the bandwidth is set by the audio system.  If you limit the audio bandwidth to 2800 cps, I don't see why you wouldn't sound just as bad as everyone else.  :-)  Including on 60 meters.

Robert Downs


-----Original Message-----
From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Rob Atkinson
Sent: Saturday, July 20, 2019 14:26
To: D C _Mac_ Macdonald
Cc: BOATANCHORS2 LIST; W9RAN at oneradio.net
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