Regulations have slowed us down but WARG remain
hopefull
that a couple of new project will see the
light of day.
The 29 MHz Gateway
This project has been largly finished for several
years
but problems with the licensing have delayed
it being on air.
For a brief time the Gateway was on air, linked
to VK6RLM,
but it had to be switched off while the licence
situation was sorted out.
This appears to have been done, some 3 years
later!
When finally operational the 29 MHz Gateway
will provide 2 metre operators
with access to a single FM frequency on or
about 29.120 MHz.
Whatever you say on 6750 repeater will also
re-transmitted on 29.120 MHz FM.
Stations hearing your transmission on 6750
or 29.120 MHz
can reply on either normal 6750 or on 29.120
MHz.
There are CTCSS requirements to operate the
29.120 MHz transmitter from 6750 by you the user.
This is to prevent licence grades who are
not licenced to operate on 29.120 MHz FM
from being re-transmitted from 6750 to 29
MHz.
The CTCSS tone required for 2 metre operation
to 29 MHz is 88.5 Hz TX.
It is also thought that CTCSS operation will
be required to access the 29 MHz Gateway.
Although an annoyance, as this tone will have
to be installed into 29 MHz transceivers,
there appears little option. 29 MHz is a noisy
band and all sorts of carriers
will trigger the 29 MHz FM receiver, and as
a result trigger up the 6750 repeater.
The licence for the 29 MHz Gateway is close
and perhaps this year 1997 will see the Gateway
in operation.
7 MHz Gateway
What if the Gateway idea was extended to another band, say 7MHz ? How about this as an idea ?
Install a new voice repeater on 2 metres or 70 CM that is dedicated
to the 7 MHz Gateway.
This repeater's transmitter is on continuous transmit.
A 7 MHz SSB receiver has its audio connected to the continuous transmission
from the repeater.
What you hear on the repeater's output is 7 MHz SSB noise,
just as if you had a 7 MHz receiver in front of you listening on
a particular frequency.
Any amateur transmitting on that 7 MHz SSB frequency would now be
heard on the repeater.
To reply you transmit on the repeater's normal input frequency,
your signal
is now transmitted out on the repeater as normal, but it is also
transmitted on 7 MHz SSB. You can have a
QSO via your 2 metre or 70 CM FM rig with an amateur on a given
frequency on 7 MHz SSB.
This repeater system is dedicated to this type of operation.
There is no signal level detection of activity on 7 MHz to turn
on the repeater's transmitter,
it is on continuous transmit, re-transmitting a single SSB frequency
on 7 MHz
This overcomes the problem of trying to detect when a SSB signal
is
there.
You hear it all, even when there is no activity, just 7 MHz noise.
Communication through this type of repeater 2 metre to 2 metre,
for example, is
possible and intended, but in between overs, 7 MHz activity would
be heard.
7 Mhz noise would be inhibited when an input signal on the 2 metre
/ 70 CM is being transmitted.
A contact between two amateurs using the repeater on 2 metres /
70 CM would appear normal.
In short several amateurs could be on the repeater along with one
or more amateurs on 7 MHz.
All sorts of combinations would be possible, with all being able
to hear all.
Monitoring this type of Gateway repeater would become tedious,
because when there is no activity you hear 7 Mhz noise.
But it is a dedicated system designed to do just that.
If you want to call CQ on 7 MHz just dial up the 7 Mhz Gateway repeater
system and away you go.
Now for the hard part...To get it licensed....Perhaps
next century...!
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