[GreenKeys] Various XMission forms

[Ralph Irish]

​A bit back before I eventually got on RTTY, I had a 'brainstorm' about how I might get on 
RTTY. Since most of the literature classified FSK as a 'form of FM', I figured I could put 
my AFSK tones into my Multi-Elmac AF-67 in the FM mode and come out with something 
resembling (A)FSK. 

I ran that idea past the late Keith Petersen, and he cringed when I finished talking. I guess 
that such a signal on HF would have sounded quite bad and most likely very wide. He gave 
me a description of what the modulation would do, etc, and basically said, "NO!!!" 
​ 
So, I filed that one under 'never do' and moved toward some kind of FSK or AFSK on HF. 

People using AFSK on 2m FM get the same type of modulation result. Just that very few were 
using FM on the HF bands. Elmac and a number of other companies had FM on many HF 
transmitters. It was a permitted mode on most of HF. Not legal on 160M back then and 
possibly some parts of other HF bands. 

74, 

Ralph - W8ROI 


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