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General| Type | Vacuum Tube Voltmeter (VTVM) |
|---|---|
| Accuracy | ±3% of full scale |
| Frequency Range | 20 Hz |
| Input Impedance | 11 Megohms |
| Tubes | 12AU7 |
| Power Supply | 50-60 Hz |
| AC Voltage Ranges | 1.5, 5, 15, 50, 150, 500, 1500 V |
Procedure for measuring DC voltages, including switch settings and lead connections.
Procedure for measuring AC voltages, including switch settings and lead connections.
Procedure for measuring resistance, including switch settings and calibration.
Instructions for measuring decibels, relating them to AC voltage measurements.
Reference to applications section for details on zero-center meter indication.
Using the DB scale to measure power levels in a 500 ohm circuit.
Utilizing the DB scale for aligning radio receivers with a 400 cycle signal.
Using zero-center indication for alignment in FM/AFC circuits.
Formula and example for calculating power output based on voltage and impedance.
Measuring grid voltage to determine oscillation strength in radio circuits.
Measuring automatic volume control voltage at various points in a receiver.
Measuring DC voltages at power supply components and tube pins.
Measuring bias cell voltage without drawing current, preventing damage.
Measuring DC voltage for TV picture channel adjustments.
Testing for gassy tubes by measuring grid bias for abnormal conditions.
Measuring various AC voltages within radio receivers.
Detailed description of the balanced bridge circuit used in the DC amplifier.
Explanation of the circuit's function when used as a DC voltmeter.
Explanation of the circuit's function when used as an AC voltmeter.
Explanation of the circuit's function when used as an ohmmeter.
General procedure for calibrating the instrument for accuracy.
Preliminary steps required before calibration.
Specific steps to calibrate the DC voltage ranges.
Information regarding electrostatic pickup and its effect on measurements.
Specific steps to calibrate the AC voltage ranges.
Information regarding ohmmeter calibration requirements.
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