[RTTY] RTTY on 160 Meters

[Bill Coleman]

On Feb 27, 2006, at 10:59 AM, Bill Turner wrote:

> Very true and that's a shame. 160 is a great band for up to a few
> hundred miles easily and more with some power and big antennas.

Problem with RTTY operation on 160m has to do with multi-path  
propagation causing inter-symbol interference. It's the same reason  
why 300 baud packet works on 20m, but not on 80m.

Reducing the symbol rate decreases the inter-symbol interference.  
This is why 31 baud PSK has less trouble than 45 baud RTTY.

Of course, now that we are at the bottom of the sunspot cycle, 160m  
RTTY may be practical at 45 baud, since the less intense ionization  
of the ionosphere would reduce the multi-path propagation.



Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901