Lee
It will be wider than a 2Tone DOOK transmission. You do not need a spectrum
analyser to find out just another reasonable receiver with nothing plugged
into the antenna socket, with attenuator in and pre-amp off. Transmit on one
and listen on the other. Try FSK and then 2Tone DOOK and see what the
difference is.
Then you can make you choice based on real world information.
Of course with FSK you will still have the unavoidable timing jitter of FSK
using a PC running Windows. At times this can be so bad that it will force
an error at the other end. Something that is avoidable. Why spend a lot of
money on the radio, antenna, PC and software and then use something that is
less than optimum?
73 David G3YYD
-----Original Message-----
From: Lee Roberts [mailto:ham@n0sq.us]
Sent: 14 November 2016 17:18
To: David G3YYD
Subject: Re: [RTTY] WAE RTTY
On 11/14/2016 02:58 AM, David G3YYD wrote:
> I am pleased to see that more and more people are using narrow
> bandwidth transmissions. However too many of those old Icoms are still
> being used on FSK that take up several KHz of bandwidth when there is
> the technology available to just take up 350Hz maximum.
>
>
When I started doing RTTY I was using a TS450 with with a PK232 (?)
interface for FSK. I got rid of the PK232 (recycled) and sold the TS450
after buying the TS2000. Then I went to using AFSK but now I'm back using
FSK with a TS2000. Being that it's a newer rig it probably doesn't use up a
lot of BW during transmitting but I have no way of knowing since I no longer
have access to a spectrum analyzer since I retired a little over a year ago.
No one has come to my door with a baseball bat so I guess I'm "safe".
Anyway, I'm glad that I went back to FSK since I can use my 250 Hz receive
filter which made a difference in knocking out QRM. With AFSK I was able to
adjust the SSB filter down to a 400 Hz BW.
I need to try out the 2tone beta to see how it works out, also. I guess I'll
"promise" not to use my Icom 706 for contesting.
73 de N0SQ
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