FM35 14
USING THE FM35 WITHIN THE HOME
Typical use for the FM35 would be to connect it to a personal computer within
a large home so that whatever MP3 or other audio files are playing can also
be tuned-in on portable FM radios in other rooms, the garage or out in the
yard. Use the RF adjustment control to fine tune the RF output level to just
reach the area you intend to cover.
The audio connection consists of using shielded audio cables to connect the
line or speaker level output to the audio inputs of the FM35. Consult the litera-
ture that came with your stereo equipment.
Even if you intend use of the FM35 for your own home and family, it is still
your responsibility, in accordance with Part 15 of the FCC Rules, to ensure
that this operation does not cause interference to your neighbors.
EXPERIMENTAL "BROADCASTING" PROJECTS
To use the FM35 successfully as a "broadcasting" service for interested listen-
ers in a school or immediate neighborhood, most of your effort will be concen-
trated on smoothly "managing" or mixing the audio signals fed into the trans-
mitter input. Operation of the transmitter itself consists simply of the following:
1. Carefully checking for an open frequency between 88-108 MHz in accor-
dance with FCC Rules, Part 15.
2. Setting up a suitable antenna.
3. Connecting the audio source to the input jacks.
4. Turning on the transmitter while you intend to be "on the air" and turning it
off when you are finished.
The more home-built your complete setup, the more it is in conformity with the
spirit of FCC Part 15 regulations.
You can greatly add to the versatility and professionalism of your transmitting
station by adding an audio mixer and/or processor. Mixers allow you to
smoothly ‘blend’ from one audio source to another just like the commercial
stations do.
ANTENNA IDEAS
A simple, yet very effective, antenna for the FM35 consists of a "dipole", set
up either horizontally or vertically, and connected to the transmitter output jack
through a few feet of coaxial cable (either RG-58, RG-59 or miniature RG-174,
available at Radio Shack and other sources). Correct dipole lengths for major
sections of the 88-108 MHz band are:
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