[RTTY] MMTTY, permanently disable AFC

[Joe Subich, W4TV]

On 2014-06-17 4:21 PM, Bill Turner wrote:
> Having AFC on while manually tuning your VFO will lead to your RX and
> TX frequencies being different by a small but definite amount. Why
> not get them both exactly the same?

In FSK it is not uncommon to have a small offset between RX and TX
simply because very few operators have a sufficiently developed sense
of pitch to accurately match the transmit tones.  While using crossed
ellipse or other tuning indicators can help, they are not always enough
when tuning in a hurry, when dealing with QRM, or weak signals.  A
restricted range AFC can often make the difference between copy and no
copy even if it results in a 10 or 20 Hz difference between TX and RX
frequencies.

73,

    ... Joe, W4TV