[RTTY] Low tones

[John Merrill]

Thanks, Chen. My main worry would be not properly (over) driving the transmitter with AFSK and harmonics. I guess my hearing isn’t too bad yet so I will continue using the high tones but I use FSK only.

73, John N1JM
> On Mar 24, 2016, at 11:25 AM, Kok Chen <rtty at w7ay.net> wrote:
> 
> If you overdrive an SSB transmitter, you will put out lots of garbage since the third harmonic of the low tones will go through the transmit filter.   The third harmonic (even second harmonic) of the high tines are usually outside the transmit filter.