EUW-24 VTVM

The Heathkit EUW-24 Vacuum Tube Voltmeter has been designed to provide dependable
measurement of AC and DC voltages, and ohms. The use of 1% multiplier resistors and
a printed wiring board for the tube stages insure accurate stable circuit operation.
Voltage for resistance measurements is obtained from a size C flashlight cell. All
operating controls are located on the front panel; the internal controls can be
adjusted with a screwdriver through small access holes in the front panel.

A single test probe is used for all measurements. The handy thumb switch in the probe
uses one position for DC voltage measurements, and the other for AC voltage and
resistance measurements.

SPECIFICATIONS
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Electronic DC Voltmeter

Ranges . . . . . . . . . . .  . . . . . .  0-1.5, 5, 15, 50, 150, 500, 1500 volts full scale 

Input Resistance  . . . . . . . . . . . .  11 megohms (1 megohm in probe) on all ranges

Circuit	. . . . . . . . . . . . . . . . .  Balanced bridge (push-pull) using twin triode

Accuracy  . . . . . . . . . . . . . . . .  +/- 3% of full scale

Electronic AC Voltmeter

Ranges . . . . . . . . . . .  . . . . . .  0-1.5, 5, 15, 50, 150, 500, 1500 rms scales
					   (.353 of Peak-to-peak)

Peak-to-Peak Ranges . . . . . . . . . . .  0-4, 14, 40, 140, 400, 4000 volts full scale

Input Resistance  . . . . . . . . . . . .  1 Mohms on all ranges

Input Capacitance . . . . . . . . . . . .  Shunted by 45 uuF (measured at input terminals)

Accuracy  . . . . . . . . . . . . . . . .  +/- 5% of full scale

Electronic Ohmmeter

Ranges . . . . . . . . . . .  . . . . . .  Scale with 10 ? center X1, X10, X100, X1000,
					   X10k, X100k, X1M. Measures .1 ? to 1000 M? with internal cell.

General

Meter . . . . . . . . . . . . . . . . . .  4-1/2”, 200 ?a movement, polystyrene case. Meter
					   terminals brought out to front panel to facilitate
					   external connections.

Probes	. . . . . . . . . . . . . . . . .  Combined AC-OHMS-DC switching probe, single jack input
					   for probe and ground connections.

Front Panel Controls. . . . . . . . . . .  Function switch (OFF, AC, DC-, DC+, OHMS)
					   Range switch (AC and DC volts and ohms)
					   Zero Adjust
					   Ohms Adjust

Controls Accessible Through		   AC Balance
Front Panel . . . . . . . . . . . . . . .  DC Calibrate
					   AC Calibrate

Multipliers . . . . . . . . . . . . . . .  1% precision type

Circuit Board . . . . . . . . . . . . . .  Printed wiring; etched metal process

Tubes . . . . . . . . . . . . . . . . . .  1 – 12AU7, twin triode meter bridge
					   1 – 6AL5, twin diode half-wave voltage doubler

Power Indicator	. . . . . . . . . . . . .  Neon lamp

Battery	. . . . . . . . . . . . . . . . .  1.5 volt size C flashlight cell

Power Requirements. . . . . . . . . . . .  105 – 125 volts, 50/60 Hz AC, 10 watts

Dimensions. . . . . . . . . . . . . . . .  6-1/2” high, 11-1/2” wide, 5” deep

Net Weight. . . . . . . . . . . . . . . .  4-1/4 lbs.