>>>AA6YQ comments below
--- In digitalradio@yahoogroups.com, "DuBose Walt Civ AETC CONS/LGCA"
<[EMAIL PROTECTED]> wrote:
>snip<
In the case of 40M, if each "data channel" (mode bandwidth) is 5 KHz
wide, there would be room for 25 QSOs. I RARELY hear 25 QSOs between
7000 and 7150 KHz on any given evening. Most of the time there are 4
or 5 (some multi stations) QSOs within a 15-20 KHz section of the
band and then the rest scattered out with 3 maybe 4 individuals in a
QSO. In all, probably less than 30 callsigns can be heard on the
band. With 25 5KHz "channels" available and 5 having multiple users,
that leaves room for 20 individual QSOs.
>>>Either you have a very poor 40m antenna, or you're only listening
during coronal mass ejections. Over the last couple of evenings,
there have been 10-15 stations in 40m PSK segment alone, with at
least 15 CW stations below them and sundry digital modes above them.
Folks, we got to use our heads to make informed operating decisions.
If we do, I believe that we have adequate space for even some 10 KHz
bandwidth modes.
>>>If you repeat your testing using a dummy load for an antenna, you
can probably justify 25 kHz modes.
>>>I've asked you this question in the past, but you've never
responded: what commercial amateur transceiver has a passband capable
of sending and receiving a 10 KHz bandwidth mode?
73,
Dave, AA6YQ
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