No offense Bonnie, But if you believe there is no activity on the freqs/times you mentioned below you really need an antenna (and doubt you do as I can work you often). Guess it all depends on how one defines "nearly vacant". And of course that will change drastically with the sunspot cycle.
Hope to see you on the air, maybe on one of those nearly vacant freqs. As an aside, Olivia performed very well when we were on the other night....impressed with its weak signal capability for a "conversational" mode. Be well, Bill N9DSJ --- In [email protected], "expeditionradio" <[EMAIL PROTECTED]> wrote: > Hi Bruce, > > Digital Voice repeaters, using single-channel near-real-time > interleaved multiplexed OFDM, could work in a 5kHz bandwidth. This is > a viable bandwidth for a single channel DV voice repeater in any HF > amateur radio band, regardless of propagation. > > Take a look at the nearly vacant HF amateur radio spectrum, 24 > hours/day, regardless of our position in the solar cycle: > > 21385-21450 kHz nearly vacant 24/7/350 > 24890-24990 kHz nearly vacant 24/7/365 > 28550-29500 kHz nearly vacant 24/7/350 > > Other areas of HF amateur radio spectrum are nearly vacant at > different times of day or night, relative to our position in the solar > cycle. > > During at least 4 years at the bottom of every 11 year solar cycle, > some HF amateur radio bands are nearly vacant at various times > of day or night. > > Examples of nearly vacant HF ham bands: > > 1800-2000 kHz 2hr after sunrise to 2hr before sunset > 3500-4000 kHz 5hr after sunrise to 3hr before sunset > 14000-14350 kHz 5hr after sunset to 1hr before sunrise > 18000-18168 kHz 4hr after sunset to sunrise > 21000-21450 kHz 4hr after sunset to sunrise > 24890-24990 kHz 3hr after sunset to sunrise > 28000-29500 kHz 3hr after sunset to sunrise > > 73 Bonnie KQ6XA >
