
Prometheus Background
Prometheus Fact Sheet
Alternatives to Low Power FM
With the change in regulations for LPFM limiting available frequencies
at this time, we thought it might be helpful to look at various alternatives
to Low Power FM.
The following discussion presents a range of alternatives and options
that offer various levels of viability. It is our judgement at Prometheus
that none of these are as generally promising as fighting for a reinstatement
and expansion of the original LPFM service. While none of them are as
good as the promise that LPFM holds, one of them might be appropriate
for your group to pursue.
Unlicensed Legal FM
Regardless of popular misconceptions, it is not legal to broadcast on
FM at low power, or at any power, without a license from the FCC. It doesn't
matter if you are less than 100 watts or less than 1 watt. That is why
the FCC has been trying to institute LPFM - to provide a legitimate license
to very low power operations.
The only exception is that you are allowed to broadcast on FM without
a license if your transmitter produces about 1/25th of a watt, or 25 milliwatts.
This is only enough power to go about 100 feet, under the best conditions.
It is actually not the power but the field strength that the FCC measures.
The way the FCC checks for compliance with the law is whether you exceed
a measurement of about 250 microvolts/meter on a field strength meter,
which is a tool that is specifically designed to measure the strength
of electromagnetic fields. This rule is designed not for broadcast transmitters,
but more to allow for wireless microphones and similar devices. Because
many garage door openers and computers accidentally exceed these limits,
through poor design or breakdown of some sort, the fact is that FCC field
agents actually spend very little of their time looking for illegal radio
operators, but instead, are spending their days tracking down malfunctioning
pieces of equipment like this that are inadvertently fouling up the electromagnetic
spectrum.
[Next...Pirate Broadcasting]
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