[R-390] R-390A frequency drift stability specs

[Stan Gammons]

On 1/22/2018 11:49 AM, Nick England wrote:
> FWIW, maybe it is worth reviewing what the R-390() was designed for - CW
> and single channel RATT (RTTY).
> CW was, of course, no problem for the R-390() using internal BFO.
> The military converted to RATT as fast as it could for a number of reasons,
> including the huge benefit of on-line crypto.


Yes.  However some preliminary testing with an hour or slightly less 
warm up, both ovens off, show it's stable enough to decode FT8.




73

Stan
KM4HQE