On 2006-06-20, Ben Jackson wrote:
I'm still working on my HF APRS beacon idea (25MHz-14.85MHz = 10.151)

The replies to this aren't showing up on my news server, but from google
groups I see that

Doug Smith asked:
I realize this doesn't really answer your question, but isn't 10.15 the
band edge - and out of the band once you apply modulation?

With LSB and ~2kHz tones it's actually back *in* the band with modulation.
HF packet is FSK, and the mark/space for APRS are at 10.149.200 and .400.
When implemented as AFSK + LSB + modem you have to take into account the
modem tones, which vary considerably. In fact, you can use USB and tune
below the band as well. If you google "hf aprs" you'll find a bunch of
tables for various radios and TNCs.

--
Ben Jackson

http://www.ben.com/