Ramsey Electronics FM25A Assembly And Instruction Manual - page 19
FM25A
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USING THE FM25A WITHIN THE HOME
A most practical use for the FM25A would be to connect it to the main stereo
system within a large home so that whatever is playing on the main system can
also be tuned-in on portable FM radios in other rooms, the garage or in the
yard.
This connection consists of using shielded audio cables to connect the auxiliary
"line audio" output of your cassette deck, CD player or other stereo device to
the audio inputs of the FM25A. Consult the literature that came with your stereo
equipment.
Even if you intend use of the FM25A 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 FM25A successfully as a "broadcasting" service to 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 transmit-
ter input. Operation of the transmitter itself consists simply of the following:
1. Correct construction and adjustment.
2. Carefully checking for an open frequency between 88-108 MHz in accor-
dance with FCC Rules, Part 15.
3. Setting up a suitable antenna.
4. Connecting the audio source to the Left and Right input jacks.
5. Turning on the transmitter while you intend to be "on the air" and turning it
off when you are finished.
Explaining how to build a simple audio "mixing" panel or box, which is at the
heart of any studio operation, is beyond the purpose of this instruction manual.
We do recommend that you build a mixing system, for several reasons:
1. Parts to do so are readily available at Radio Shack.
2. It would be an excellent class, family or Scout project.
3. Commercially-made stereo mixing consoles, while much less expensive to-
day than a decade ago, will cost much more than did your FM25A kit!
The more home-built your complete setup, the more it is in conformity with the
spirit of FCC Part 15 regulations.