Minimum Theremin Product Specifications

(Back to "Technical Information")


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 article:

(click here to enlarge graph)



(top)

2006 08 17


Text, Images, and format ©2006 by Harrison Instruments, Incorporated. No part of this page may be reproduced without express written consent of the copyright holder. Minimum Theremin design used with permission of owner. Specifications may change without notice.