> bruce mallon <[EMAIL PROTECTED]> wrote: > Would you like to show us those frequency's? > And would you like to show them when the MUF gets that > high.
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
