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MX10 Page 4
INTRODUCTION TO THE MX10
Seeing the need for a high fidelity low noise mixer to be used with our
micropower transmitters, we came up with this easy to build compact mixer.
The small size lends to the small size of the transmitter for portability. You can
easily fit an entire radio station inside of a briefcase, just try that with electronics
of just a few decades ago! While designed to go with our micropower
transmitters, the MX10 will work as well, if not better than most commercial
mixers on the market today.
Mixers are used in all sorts of audio applications such as rock concerts, DJ
booths in night clubs, weddings, radio stations, recording studios and so on. If
you've ever looked at a mixer board for a concert, you would notice that they
have upwards of fifty or so channels, and seven or more controls for each
channel. Each channel has reverb, tone controls, delay, and more. Our MX10
has two inputs for line levels which may include a CD player and a tape deck, it
also has one stereo input for a phono with RIAA equalization (boosts bass
response of records). The MX10 does not have any tonal controls for each
channel, but almost all users of this project will want a flat response anyhow. If
they do not, they will run the output of the mixer directly into an equalizer to
custom-tailor their sound. For example when a person makes a car tape, they
may want to boost the bass to get over road noise.
We also included more than one microphone input on the MX10 which allows
two people to talk at the same time. When one microphone is plugged in to the
left channel mic, it exits the mixer in both channels. When both mics are
plugged in, the left one comes out the left channel, while the right one comes
out the right channel. This leads to a nice effect on a transmitter for a listener to
visualize the DJs.
The MX10 was designed for simplicity, low noise, and low cost. Its small size
makes it easy to carry around and store. Its long travel on the controls make it
easy to mix audio signals smoothly and accurately. Now you can give those
professionals a run for their money. We hope you enjoy building and using the
MX10, we sure did at Ramsey!