The model VT-150 is a 2-channel solid-state voltmeter with an r.m.s Scale It provides facilities to make an accurate and stable voltage measurement from a minute voltage of 1 mV up to 300 V with frequencies of 10 Hz to 500 kHz. The model VT-150 has an extremely high-sensitivity. So, it may also be used for measurement of the noise of power source and others, not to speak of general measurements. Further, it may be used as a high-gain Amplifier FEATURES ** All solid-state circuitry provides minimum warm-up time and small power consumption. ** 2-pointer meter promises more effective uses of a space comparing with those provided by two sets of conventional voltmeter. ** Frequency bandwidth of 10 Hz to 500 kHz and voltage range of 1 mV to 300 V available for various uses. ** Metal-film resistor with a low temperature coefficient and less secular change employed as attenuator resistor. ** Voltage regulator circuit provided in Power Supply circuit. ** Voltage Scale graduated in r.m.s. values of sine wave voltages, dB and dBm Scale easy means provided specifically for measurement of S/N and so on. ** Monitor output terminals provided for connection of an oscil- loscope and the likes.