Voltage Transformer 5 Amp Auto AC Variable Voltage Regulator,500VAC Max,120VAC Input, 0-120V/130VAC Output

In order to purchase the right variable transformer, it is critical that you know the amp usage by your electronic device. It is always best to be conservative otherwise you risk destroying the variac and it can be very dangerous. For example, if your device requires 5 amp, buy the variac with up to 10 amp. A rating of 500VA means that at 100volt, the unit can sustain at maximum 5amp.
Using it for Guitar Amp ("Brown-Sound") and for controlling a transformer for Lichtenberg wood burning
Product Description

There are a lot of common uses and practical applications for variacs. As we mentioned earlier, theyre more portable and more cost-effective than regular AC power supplies, which pretty much makes them a top pick for short-term projects and casual hobbies. variable autotransformercan be used to gradually revive previously dormant electronic equipment. They can also be used to regulate servo motors and control the temperature of ovens and heaters.

Voltage adjustment, when used with thermostatic control, provides more uniform heating.

You can also use variacs to simulate various voltage and line conditions for experiments, or power electrical equipment designed for voltage that isnt the typical 120V or 240V supplied domestically.

Here are some other applications:

Regulating voltage

Controlling specified input voltage to rectifier elements to generate variable DC voltages from an AC source

Operating electrical equipmenttypically motorsat the correct or optimal voltage even with subnormal or higher-than-normal supply

Varying step-transformer output voltage by control of input voltage Starting synchronous or induction motors in order to provide 50%-60% of the total voltage to the motor stator during start-up.

Correcting voltage in subnormal or over-voltage supplies on 1-phase, 2-phase, or 3-phase circuits

Compensating for voltage drops by giving small boosts to the distribution of a cable Controlling AC motors and DC motors operation rectified AC circuits Powering fans and other motors with low starting torque

Controlling the brightness/

Extending lamp life by operating it below rated voltage

Calibrating electrical equipment and controls

Compensating for appreciable voltage drops at the end of lines where distances run too long