[GreenKeys] RATTS

[Ralph Mowery]

----- Original Message ----- 
From: "Jerry" <gh1lockett at bak.rr.com>
To: "John Becker" <w0jab at big-river.net>; <greenkeys at mailman.qth.net>
Sent: Tuesday, February 22, 2005 2:14 PM
Subject: Re: [GreenKeys] RATTS


> You took the words right out of my mouth.  Rtty traditionally has always
> been on LSB on all bands...
>
> Jer -n6jp-

Low band fsk rtty is neither usb or lsb.  It is two frequencies, one for the
mark and one for the space tone.  Ham rtty is usually sent so the space tone
is lower than the mark tone.  The comercial rtty was so the space was the
higher tone.  When using audio demodulators and the switch (if it has one)
set for normal then you receive in the lsb mode for hams on all bands and
usb for the comercial.  YOu can use either sideband if you switch the audio
tones to the "reverse" position.
Even the 2125 and 2295 tones do not mater.  Without getting in the the very
technical reasons, any tone pair 170hz apart can be used and the person on
the other end will never  know the differance.

de KU4PT