Ramsey Electronics STC1 Instruction Manual - page 22
STC1
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USING THE STC1:
The STC1 is simply a sound processor. It is installed in series to process the
audio right before it goes to the transmitter itself. No more processing should be
done on the audio between the STC1 and the transmitter, otherwise it throws
off the clipping settings. If you have an equalizer connected to your transmis-
sion setup, connect it before the STC1.
An example setup is shown to give you an idea of a setup that we have here at
Ramsey. Any mixer can be in place of the MX10, but the MX10 gives you all
the goodies you need for a good solid radio show such as smooth panning,
LED peak hold bargraph, and low noise. In specific, it was designed for use
with stereo transmitters.
To get the right sound levels and proper deviation out of the stereo transmitter,
you will most likely need to turn up the gain controls in the transmitter itself. The
reason for this is the non-clipped audio on the output of the STC1 is actually
about one-half the voltage level of actual line level (about .5 volts peak-to-
peak). This level is where the good clean sound is available. The easiest way to
do this is just compare your sound level to that of adjacent radio stations on a
good FM receiver. Just adjust the levels until they sound about the same.
The most fun part of this kit is custom tailoring your sound to you own specific
desires. The Bass, Presence, and Brilliance controls allow you to do this with a
great range of flexibility. For you hard rocker types, you will want to turn the
Presence back a bit, then crank the Bass and the Brilliance to emphasize the
drums and guitar. For you country music buffs, you will want to turn up the
presence to emphasize the vocals. For soft rock you may want to turn back the
Brilliance to give the music a more warm and cozy sound. Lets not forget the
R&B and RAPP, this is where the Bass control comes in handy.
When you adjust the sound to your tastes, and have turned up any of the con-
trols on the STC1, you may want to consider turning down the gain on the clip
controls of the STC1. Since you are increasing the gain in a particular band of
audio frequencies, this band will be more likely to cause clipping distortion due
to the higher audio levels produced. The LEDs on the front panel should be a
good indication of when this occurs, so just turn back the gain until they don’t
blink anymore.
Enjoy your new addition to your micropower radio station, happy transmitting!