Amp Variac

Variacs Home

Variac Transformer
Variac transformers are available in single and three phase and their distortion free output is ideal for sensitive electronic applications.

Types of Variacs
Click here to find out the different types of Variacs and what applications they are used for.
 

Applications for Variacs
Variacs transformers are used for many different applications but are ideal for electronic applications that are sensitive to distortion.

Choosing a Variacs
What information do you need to know before choosing a Variacs?  Let us help in choosing the right Variacs for your applications.

Variac Variable
Variac Transformers are sometime called Variable Transformers because they are AC voltage controls that provide a variable AC Voltage.

Amp Variac
Variacs range in size from 120V to 600VAC single and three phase and fractional to 700 Amps.

Amp Variac

When people discuss Amp Variac it could be the ampere use for a particular model of variacs.  Or it could be they are talking about a  variac transformer for their guitar or amplifier system.  Amps in a variac transformer is the amount of electrical current that flows through it.  The formula of amps is amp equal voltage and resistance or I=V/R.    A common bench top unit might be 125 volts input/140 volts output at 15 amps or an panel amount might be 240 or up to 280 volts input  with an operating current rating of 3.5 amps.  A 3-phase variac with 480 volts could have over 300 amps.  Most manufacturers will list the amps.  TEMCo technical and engineering staff can help you in the selection process to make sure you are getting the right Variacs for your application.

To understand amp variac and how it works you need to know what a variac is.  Variacs are a adjustable line transformers that allows you to vary the AC line voltage coming out of the wall outlet and going into a device. The voltage range of common variacs are from 0 to 140 volts. 

Like we mention above, variac amps term can also be use to describe the use of Variacs to alter their amp's sound.   The notably Eddie Van Halen used the variacs for turning down the line voltage running their amp.  This lowers all the voltages inside the amp, including the plate voltage on the power tubes. This cause the amp to put out less power and reduces headroom and makes the power tubes compress and distort more to create the "brown" sound.  You will find many articles on the web about variacs harming the amp.  If you follow one simple rule, never turn the variac voltage up past normal line voltage (120 volts).  When using the variac past normal line voltage it will raise the supply in the amp to excessive levels which will explode the filter capacitors, and possibly arc out tube sockets and transformers as well.

We have provided you with a brief review on how variac amp works but for more technical assistance call TEMCo and they can help you with any questions you may have and also assist you in making sure you get the right variacs for your applications.  TEMCo has been in business since 1968 and is located in Fremont, Califorinia.  TEMCo not only offers the lowest prices but only sells quality products which they back by the best warranties.  Find out why so many customers keep coming back to TEMCo for all their power source needs.  Call TEMCo Today!!!

CALL TEMCo for all your transformers needs!!
1-510-490-2187 or 1-800-613-2290

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Amp Variacs

How  Variacs are Construction
Variacs use a toroidal core, wound with one continuous strip of suitable steel.
 

3 phase Variac
Resources on 3 phase and how a  3 phase Variac works.

Variac Voltage
Variacs are typically used to step up voltage 15 percent or more. Variacs are the most versatile and reliable voltage controls available.  

Finding a Variac Manufacturer
Provides guidelines on choosing a  Variac manufacturer and what to look for when purchasing a Variac Transformer

TEMCo's team of experienced Variac specialists are standing by to assist you!

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