[CW] Tone Modulated CW

[Stan Barr]

Hi,

N2EY@aol.com said:
> 
> I think the main reason was so that the signal could be copied by any 
> receiver without accurate tuning. In an emergency that could be the 
> difference between life and death. A2 has long been a common mode in the 
> maritime services. 
> 

Also I think MCW was a used on the 500KHz calling frequency so that a
call wouldn't be missed by being zero-beat with the reciever bfo.

-- 
Cheers and 73,
Stan Barr  G0CLV  G-QRP 3369   g0clv@dial.pipex.com

"Never leave well enough alone." -  Raymond Loewy