[GreenKeys] Proposed Autostart Net Frequencies

Mon, 03 May 2004 10:31:22 -0400

   Here in New England 7083 and frequencies around it get occupied by European SSB a couple of hours before sunset, continuing on
past local midnight here.  And, during any DX SSB contest, the whole 40m band right on down to 7030 or even lower is full of SSB.
In major CW contests (especially domestic North America contests) this area of the band will fill with CW signals as well.

   We can avoid all the above problems by using 10.133.

-- Eric K3NA

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Roy Norris
Sent: 2004 May 3 00:12
To: Greenkeys
Subject: [GreenKeys] Proposed Autostart Net Frequencies

I have been monitoring the bands .for two nights and both.10.133 and
7.083  have been pretty clear.  There was a little bit of SSB on both
7.083 but very weak South American stations which should not cause a
problem nor us them.  10.133 also was very clear with only a little
military SSB and that was quite weak.  There is a very strong commercial
or military RTTY station 3 khz below the 10.133 frequency, encrypted,
but that should not be a factor.  So either frequency would probably
work for our autostart net.

10.133 appeals to me from the point of view that I could set up a
dedicated RTTY autostart station with WRU and still be able to operate
the other ham bands since 10.133 is not harmonically related to any of
the other ham bands below ten meters..  However, we do have a 200 watt
power limitation on that band which might be a problem for sending
bulletins and such for our more distant listeners.

If I end up doing the net control duties, I can go with either of the
frequencies.  However, if we use 7.083 or some other 40 meter frequency,
I can put a 1500 watt output station on the air 24/7 which should reach
anywhere in the US under most propagation conditions on 40 meters.  That
might be preferable to 200 watts on 10 megahertz, particularly for those
stations that don't have an optimum receiving antenna.

For antennas, I can put up a vertical dipole for 10.133 Mhz which would
give a good omni directional signal with a low angle of radiation which
would make the west coast of the US nicely and also could be heard
internationally under good propagation conditions.  For 40 meters, I
would go with an 80 meter full wave horizontal loop at 60 feet which has
a nice four lobed pattern for general coverage and reasonable radiation
angles for both local and dx propagation..  I presently have a 135 foot
dipole fed with openwire at 65 feet which will work on 40 meters.

I am trying to purchase a used HAL DS-3100 that has WRU capability so
that we can go ahead and get things started.  But we need to decide on a
frequency so lets hear your final suggestions and I will get busy with
getting things set up for us to go live later this week.

Best regards to all - Roy Norris, K4EEG

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