Variac / Variable Autotransformer A variac is an autotransformer with sliding tap. They are also known as variable autotransformers. Other Other unlisted, specialized, or proprietary transformer type.

Variacs are often fitted with adjustable control knobs and allow for very smooth voltage control. A variable autotransformer (Variac) Isolation transformers contrast with autotransformers in that they ...

In some equipment designs, the Variac (variable auto-transformer) for adjusting the voltage is mechanically coupled to the rheostat ensuring the short circuit current is always limited to 1 A.

Visually, the light bulb colour goes from an orange glow to a bright white glow as the voltage is increased. Place the variac on a horizontal surface near a power outlet. Connect the light bulb to the ...

The latest amp-emulator pedal from UAFX offers three models from a stable of 1968 100-watt Marshalls: the Super Lead, Super Bass, and Brown. The Brown is an exclusive setting that emulates a Super ...

There is also a variac, which allows the output voltage to be adjusted over a wide range for testing. Of course, circuit breakers are a must, and current and voltage meters keep you informed about ...

Manufactured by the Electrodyne Company, Norwood, Massachusetts. Variac V20, manufactured by the General Radio Company, Cambridge, Massachusetts. A single-channel, direct-wiring instrument ...

When a length of copper or nichrome is heated, it lengthens due to thermal expansion. The wire is suspended between two posts and heated by a variac. A small weighted hook is placed in the middle of ...