[Lowfer] Crystal Ball Thinking

[Bill Ashlock]

> > I'd like to ask a simple question: What's going to become of the
> > present QRSS crowd on 1750 when and if the U.S. band plan commences for 
>137.

>Don't forget that the proposed 136 kHz rules don't allow for unattended
>beacons. I see the 1750 meter stuff as being excellent for propagation
>research, and hope that some of the gang will keep their beacons >running.

The reasons I will always use the 1750M band for experimentation are:

1) The transmitter final is VERY simple and low in cost. Multiple 
transmitters and antennas can be operated at the same time.
2) 1w input represents plenty of signal to map out local coverage up to 
100mi. The results, IE: 'signal levels' at all locations will be exactly 
1/10 (-20db) of the signal levels at 100w.
3) Experimentation at the final and antenna has no risk of dangerous shock 
or RF burn. At 100w the 'creativity factor' is much reduced from fear of 
touching the wrong point while making adjustments.
4) Interference to neighborhood radio and television receivers is 10 times 
less. No filter is required at the output of the final at 1w. A filter, 
definitely required at 100w, usually messes up the efficiency of the final. 
This adds an undesirable variable to experimental results.
5) Minimal problems with sending on a frequency currently in use by another 
136er.

Bill




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