Ramsey Electronics FM10A 用户手册
negative battery wire. The resistor is omitted if you are using a 1.5 volt
battery for prolonged short-range operation.
EXPERIMENTAL "BROADCASTING" PROJECTS
battery for prolonged short-range operation.
EXPERIMENTAL "BROADCASTING" PROJECTS
To use the FM10A successfully as a "broadcasting" service to interested
listeners in a school or immediate neighborhood, most of your effort will be
concentrated on smoothly "managing" or mixing the audio signals fed into the
transmitter 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
accordance with FCC Rules, Part 15.
accordance with FCC Rules, Part 15.
3. Setting up a suitable antenna.
4. Connecting the audio source to the Left and Right input jacks.
5. Turn on the transmitter while you intend to be "on the air" and turn it
off when you are finished.
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 design and build this mixing system
yourself, for several reason:
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
today than a decade ago, will cost much more than did your FM10A kit!
4. The more home-built your complete setup, the more it is in conformity with
the spirit of FCC Part 15 regulations.
If you are designing the FM10A and its mixing inputs to serve as an
educational and entertaining toy for your children, we suggest that the
FM10A PC board be incorporated with the mixing circuits into a durable, non-
hazardous enclosure. If infants and very young children are likely to
"examine" this magical box when their siblings are not looking, it is better not
to use a whip antenna, due to the hazard of eye damage. Also, remember
that any broken whips from radios, cordless phones, etc. can become
dangerously sharp.