[GreenKeys] Military Mark High to Mark Low change - FWIW

[Dave Horsfall]

On Fri, 8 Mar 2024, Nick England wrote:

> I believe that audio high freq attenuation was responsible for an 
> earlier change from 2550 Hz center to 2000 Hz center. The voice channel 
> SSB rigs didn’t like 2975 as a high tone. 

Thanks!

> But I don’t think that would have explained the change from mark-high to
> mark-low. 

It's been a while since I used RTTY, but doesn't it idle at MARK so that a 
"break" can be detected?

Apologies if I appear to be confused...

-- Dave (vk2kfu)