1PC SO65 DC 500UA panel meter VU meter with yellow backlight for tube Amplifier speaker
New VU Meter, Level Meter, dB Meter, Power Meter, Voltage Meter with a classic warm yellow backlight. The dial has been treated with anti-static protection.
Meter Sensitivity: 500μA
Meter Internal Resistance: 650Ω
Meter Backlight: Utilizes 6 pieces of 5050 SMD LEDs, providing uniform illumination, high efficiency, low temperature rise, vibration resistance, and long lifespan.
Backlight Power Supply: 5V--12VDC, 120mA. Must be powered by DC; exceeding 12VDC is strictly prohibited as it may damage the LED backlight.
Installation Aperture Specifications:
Aperture Diameter: 65.2mm
Three fixing holes are distributed at 120-degree intervals with a radius of 37mm, and the hole diameter is 3.5mm.
The backlight employs 6 pieces of 5050 SMD LEDs, offering uniform illumination, high efficiency, low temperature rise, vibration resistance, and a long lifespan.
This meter is specially customized by us, with resistance and sensitivity designed according to standard VU meter specifications. It features moderate damping, ensuring the pointer responds and swings at an appropriate speed, avoiding the overshooting or sluggishness that occurs when using ordinary ammeters as substitutes for VU meters.
The meter scale includes blue calibration lines, with a full scale of 100 and no units marked, making it versatile for measuring various parameters. Examples of applications are as follows:
It can be used as a 100V voltmeter to test the fixed bias of tube amplifier circuits.
It can serve as a 100% indicator to show the suitable range of cathode resistor current in tube amplifiers.
It can function as a thermometer scale to measure the internal operating temperature of tube amplifiers or the temperature of cathode resistors, ensuring safe operation of the amplifier.
The above applications require additional circuits and a band switch for switching functions. Specific circuits should be designed based on actual usage requirements.
In summary, when combined with the dynamic measurement of audio voltage output for power (VU meter functionality), this meter can effectively indicate four operating states of a tube amplifier, offering exceptional versatility and playability.
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