Heathkit IM-58 Harmonic Distortion Meter

The Heathkit IM-58 Harmonic Distortion Meter is the result of years
of engineering efforts to reduce the costly and complex devices
heretofore used for harmonic distortion measurements.

SPECIFICATIONS

Frequency . . . . . . . . . . . . . . . .  20 Hz to 20 Khz in three ranges

Distortion. . . . . . . . . . . . . . . .  0 -1, -3, -10, -30, 100% full scale

Voltmeter . . . . . . . . . . . . . . . .  0 -1 – 3 – 10 – 30 volts full scale

Input Resistance. . . . . . . . . . . . .  300 Kohms

Minimum Input Voltage for
Distortion Measurement. . . . . . . . . .  0.3 volts

Output Voltage for Monitoring . . . . . .  2.5 volts at full-scale meter reading

Accuracy
	Voltmeter . . . . . . . . . . . .  +/- 5% of full scale
	Distortion. . . . . . . . . . . .  +/- 5% of full scale, +0.1%

Tube Compliment . . . . . . . . . . . . .  0A2, 6X4, 5859, 12AT7, 12AX7, 12BY7

Power Requirements. . . . . . . . . . . .  105-125 or 210-250 VAC, 50/60 Hz, 30 watts

Dimensions. . . . . . . . . . . . . . . .  13” wide, 8-1/2” high, 7” deep

Weight. . . . . . . . . . . . . . . . . .  11 lbs