OK now I am on a real keyboard. the ole iphones a bit small. I was indeed aware that the subs use msk 20-50hz as I have measured in the past. But avoided the details on the small keyboard. I have also used several of the military radios when I was in the Navy. Far to many years ago. NAA thats maybe 100 miles a way can be easily detected with a diode and tuned circuit. All that said I have absolutely no real detail on the quality and stability of the signal. Subs do need a stable signal. But I know really nothing. I know Paul has suggested that just maybe the signal would be useful. Regards Paul WB8TSL
On Sun, Aug 10, 2014 at 10:30 PM, Kenneth G. Gordon < kgordon2...@frontier.com> wrote: > On 10 Aug 2014 at 19:00, Jim Lux wrote: > > > It can also be FSK.. > > but it's essentially the narrowest band simple modulation that is > > constant envelope. > > As I said, back in the 1970s, the Navy installed special equipment to > enable > phase-stable output. > > Dunno the exact details, but that was what I was told back then...by the > Navy. > > Still dunno if my Tacor 599s will even "listen" to VLF stations now, but I > intend to try them. > > VLF has always interested me... > > I have several operable VLF receivers: RAK, RBL, SRR-11, AN/URM-6, > NM-40A, R-389, etc. > > RAK is interesting in that although a TRF, it still exhibits > "single-signal" CW > reception: the "other side" of zero-beat simply doesn't exist. I was > amazed... > > Ken W7EKB > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.