Minimum Theremin Product Specifications
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| ASEEMBLED PRINTED CIRCUIT BOARD DIMENSIONS | 3.80" X 2.50" X 0.40" MAX THICKNESS |
| ASSEMBLED PRINTED CIRCUIT BOARD WEIGHT | 2.0 OUNCES |
| OPERATING TEMPERATURE RANGE | +40°F TO +90°F |
| STORAGE TEMPERATURE RANGE | -10°F TO +120°F |
| POWER SOURCE | 9 VOLT ALKALINE BATTERY |
| OPERATING VOLTAGE RANGE | 5.5 TO 12 VOLTS |
| CURRENT CONSUMPTION | 1.7 MILLIAMPERES, TYPICAL 3.0 MILLIAMPERES, MAXIMUM |
| PRACTICAL PITCH RANGE | 65Hz to 1000Hz (4 OCTAVES) |
| OUTPUT IMPEDANCE | 470 OHMS |
| REFERENCE OSCILLATOR FREQUENCY | 73 KHZ, TYPICAL |
The signal to noise ratio may be decreased by external interference, which will vary depending on the instrument's proximity to emissive sources such as power lines, fluorescent lighting fixtures, incandescent lamp dimmers, and computers. This interference may be remedied by moving the theremin away from such sources.
The printed circuit assembly is furnished with a trimming potetiometer ("ZERO
CAL") that is adjusted to provide the correct relationship of hand distance
and tone frequency. The calibration procedure is described in the Minimum
Theremin Kit Assembly Instructions. To ensure proper calibration, this product
should be used with the antenna assembly described in the Instructions.
The following graph illustrates the approximate relationship
of pitch and hand distance for a Minimum Theremin using this product, when
constructed and calibrated as specified in Minimum Theremin construction
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2006 08 17