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for hints on how to get better range (pdf)
How to maximize range for the AM1000
The two keys to
getting good range with the AM1000 are 1.Use an Am type audio processor
capable of asymmetrical modulation. 2. Connect it to a great ground. A great
ground could be the subject of an entire article,
see
this paper. We have had people that have buried hundreds of yards
of copper strapping, use drip systems to keep ground moist, and various
other creative techniques. If you have a deep well on the property that
should be a great ground, anything that will allow you to make an excellent
electrical connection to the earth should help. Choose a frequency high in
the band, in the 1610-1700 band there is much less competition from full
power stations and usually a lower noise floor. Sometimes though we have
found older radios won’t tune the higher frequencies of the high band. 1610
and 1620 are good choices if they are quiet.
Try to locate
near water or high tension lines. We have customers that have their signal
carried by high tension lines for miles. Not the 3-phase power lines, they
won’t re-radiate your signal. Also water, streams, lakes will carry the
signal for miles. We have found that a good height for the unit is 35 feet,
it is important to get it that high. Putting it higher will get more range
but the range gained per foot of height the transmitter is raised drops off
after about 35 feet. If you are not using an AM type audio processor you
need to be sure you are modulating the transmitter 100% for good range, the
received audio should be as loud as other stations on the AM dial.
The following files are helpful for improving radio
reception on the receiving end:
Improving AM Reception In An Office Building
While you can get
the unit to work without a tech background, for best results get some
technical help.
If you are having trouble finding technical assistance to install a
RangeMaster then:
Call a local AM radio station and ask for the head engineer, tell him you
need some help with a legal Part 15 transmitter, be sure to mention it is
legal.
Go to SBE (society of Broadcast engineers) webpage
SBE.org
and find the local chapter in you area, attend a meeting and find some help.
Same with
arrl.org, the ham radio organization. Again
be sure to mention you are doing something legal. They often get asked to
help put up illegal pirate stations.
Find a technical student at a local tech school.
Ask a local satellite/TV installer if they can handle the job.
Somewhere in you area there are people who are technical and can help. It is
better to find somebody retired if you can.
Keep a copy of the certification at the transmitter site. If no one is at the transmitter site, leave a copy somewhere it will be found by the FCC should they stop by. Also you can add a message to your broadcast stating something like " This signal is being broadcast from a RangeMaster FCC type certified transmitter NWXAM1000under part 15.219 of the FCC rules." Also add you contact information so the FCC can find you if they want.
That way the public and/or the FCC will not think you are a pirate.