[RTTY] RM-11708 has been amended.

[Kai]

Peter,
You are right - I looked up the ARRL product review, the SSB is BW=2855 Hz 
measured at the 6 dB down points.
To use 2800 Hz data effectively you would need to add about 100 Hz on each side 
to stay in the flat "linear phase" portion of the pass band, so well upwards of 
2800 Hz is needed on the receiver and transmitter, perhaps 3 kHz+(?) to 
effectively use 2.8 kHz emissions. This starts to be "software defined radio 
territory". SDRs are becoming more prevalent, so we definitely can not live 
without a specified BW limit.
73
Kai, KE4PT

On 11/29/2013 5:24 PM, Peter Laws wrote:
> On Wed, Nov 27, 2013 at 8:47 AM, Ben Antanaitis - WB2RHM
> <wb2rhm at wb2rhm.com>  wrote:
>
>> Kai,
>>
>> FYI----  FWIW, a Ten-Tec Orion (original or Mdl-II,  565/566) has an
>> adjustable SSB TX bandwidth of up to 3KHz wide.  These were available for
>> over 10 years.  They are 'out-of-production' now, but easily found for
>> reasonable prices (depends on your budget).
>
> The original post made me look up the bandwidth, too, on my now out of
> production IC746Pro and it's 2.8 kHz on SSB Phone.  "2.2 kHz is too
> narrow!"
>
> Kidding.  Carry on.
>
>