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Linear DC Power Supply

 

Linear DC power supplies were the mainstay of power conversion until the late 1970’s. With the advancement of switching power supply technology, linear power supplies are less popular today but still find themselves indispensable in applications that require very low ripple and noise. A linear power supply uses a big transformer to drop voltage from AC line to much lower AC voltage, and then uses a series of rectifier circuitry and filtering process to produce a very clean DC voltage.  That low DC voltage is then regulated into the desired voltage level by a dropping the difference in voltage across transistor or IC (the shunt regulator). Typical applications of linear DC power supplies include but not limited to:

  • studio mixer/audio amplifier

  • low noise amplifiers

  • signal processing

  • data acquisition - including sensors, multiplexers, A/D converters, and sample & hold circuits.

  • automatic test equipment

  • laboratory test equipment

  • control circuits

  • anywhere that excellent regulation and/or low ripple is required

 

For three decades, Mastech has made variable regulated linear power supplies with exceptionally low ripple and noise, at a fractional cost of established brands. Our success has attracted a number of copycats with look-alike products. Over the last three years, we have adopted new designs that bring reliability and fault tolerance of a linear DC power supply to the next level. After three years of testing, we are happy to confirm that the new Volteq line of linear DC power supplies has met all of our expectations in terms of voltage and current regulation, noise, and reliability, and is the linear DC power supply of choice for most of our customers.

 

If you have an audio application, you should stay with the original design of Mastech linear DC power supplies for fan-less operation.

 

For all other applications, we recommend the Volteq linear DC power supplies because of the improved robustness due to over-voltage and reverse-voltage protection.

 

Need help finding the right product? Email us at support@mastechpowersupply or call us at 408-622-9851, or check out the products below or our Selection Guide.

 

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Output leads / test leads for Variable Linear Power Supplies with output 6A or less

Output leads / test leads for Variable Linear Power Supplies with output 6A or less

$10.00 $5.00

For sale is a set of output leads / test leads that will work for any linear power supplies we sell that has output…

Output leads for Variable Linear Power Supplies with output 20A or less

Output leads for Variable Linear Power Supplies with output 20A or less

$20.00 $9.95

For sale is a set of output leads / test leads that will work for any linear power supplies we sell that has output e…

Regulated Variable Linear DC POWER SUPPLY HY1503D 0-15V 0-3A

Regulated Variable Linear DC POWER SUPPLY HY1503D 0-15V 0-3A

$95.00 $49.95

VOLTEQ HY1503D is a lab grade regulated linear DC power supply. This high quality variable DC power supply has an…

Regulated Adustable Linear DC POWER SUPPLY HY1803D 20V 3A

Regulated Adustable Linear DC POWER SUPPLY HY1803D 20V 3A

$140.00 $69.95

VOLTEQ HY1803D is a brand new lab grade DC regulated power supply. This highly stable, high quality DC power supp…

REGULATED VARIABLE DC POWER SUPPLY GPS-1850D 0-20V 0-5A

REGULATED VARIABLE DC POWER SUPPLY GPS-1850D 0-20V 0-5A

$160.00 $79.95

GPS-1850D is a lab grade regulated linear DC power supply. This highly stable, high quality variable DC power sup…

REGULATED VARIABLE LINEAR DC POWER SUPPLY HY3003D 30V 3A New Model

REGULATED VARIABLE LINEAR DC POWER SUPPLY HY3003D 30V 3A New Model

$180.00 $89.95

VOLTEQ HY3003D is a lab grade regulated linear DC power supply, an improved version of the Mastech HY3003D we carri…

REGULATED VARIABLE LINEAR DC POWER SUPPLY GPS-3030D 30V 3A

REGULATED VARIABLE LINEAR DC POWER SUPPLY GPS-3030D 30V 3A

$180.00 $89.95

VOLTEQ GPS-3030D is a lab grade regulated linear DC power supply. This high quality variable DC power supply has an…

Regulated Linear DC POWER SUPPLY HY3005D 0-30V 0-5A Over-voltage Protection

Regulated Linear DC POWER SUPPLY HY3005D 0-30V 0-5A Over-voltage Protection

$220.00 $99.95

  VOLTEQ HY3005D is a lab grade regulated linear DC power supply, an improved version of the Mastech H…

30V 3A Linear DC Power Supply with 1mA Resolution HY3003DX

30V 3A Linear DC Power Supply with  1mA Resolution HY3003DX

$220.00 $99.95

VOLTEQ HY3003DX is a lab grade regulated linear DC power supply; as an improved version of HY3003D, this power supp…

REGULATED VARIABLE DC POWER SUPPLY GPS-3050D 30V 5A

REGULATED VARIABLE DC POWER SUPPLY GPS-3050D 30V 5A

$220.00 $99.95

VOLTEQ GPS-3050D is a lab grade regulated variable DC power supply. This highly stable linear DC power supply has a…

Mastech REGULATED LINEAR POWER SUPPLY 50V 3A HY5003D

Mastech REGULATED LINEAR POWER SUPPLY 50V 3A HY5003D

$220.00 $109.95

Mastech HY5003D is a regulated adjustable linear DC power supply. This highly stable, high quality linear DC…

Regulated Linear DC POWER SUPPLY HY3005DX 30V 5A 1mA Resolution

Regulated Linear DC POWER SUPPLY HY3005DX 30V 5A 1mA Resolution

$240.00 $109.95

VOLTEQ HY3005DX is a lab grade DC regulated linear DC power supply; as an improved version of HY3005D, this power…

VOLTEQ REGULATED VARIABLE DC POWER SUPPLY HY5003D 50V 3A

VOLTEQ REGULATED VARIABLE DC POWER SUPPLY HY5003D 50V 3A

$220.00 $109.95

VOLTEQ HY5003D is a lab grade linear DC regulated power supply, an improved version of the HY5003D we carry for yea…

Mastech VARIABLE LINEAR DC POWER SUPPLY 30V 6A HY3006D

Mastech VARIABLE LINEAR DC POWER SUPPLY 30V 6A HY3006D

$230.00 $119.95

This model is out of stock, please see our updated model HY3006D. Mastech power supply HY3006D is a high quality …

MASTECH VARIABLE REGULATED LINEAR DC POWER SUPPLY 60V 3A HY6003D

MASTECH VARIABLE REGULATED LINEAR DC POWER SUPPLY 60V 3A HY6003D

$245.00 $119.95

Mastech HY6003D is a variable regulated DC power supply. This highly stable, high quality bench power supply has ou…

Improved! Regulated Linear DC POWER SUPPLY HY3006D 30V 6A Over-voltage Protection

Improved! Regulated Linear DC POWER SUPPLY HY3006D 30V 6A Over-voltage Protection

$220.00 $119.95

VOLTEQ HY3006D is a lab grade regulated linear DC power supply, an improved version of the HY3006D we carry for yea…

REGULATED VARIABLE DC POWER SUPPLY HY6003D 60V 3A New Model

REGULATED VARIABLE DC POWER SUPPLY HY6003D 60V 3A New Model

$240.00 $119.95

VOLTEQ HY6003D is a lab grade DC regulated linear power supply, an improved version of the HY6003D we carried for y…

VOLTEQ REGULATED VARIABLE DC POWER SUPPLY HY5005D 50V 5A

VOLTEQ REGULATED VARIABLE DC POWER SUPPLY HY5005D 50V 5A

$260.00 $129.95

VOLTEQ HY5005D is a lab grade linear DC regulated power supply with up to 50V and up to 5A output. This highly stab…

Variable Linear Power Supply GPR-1810HD 0-18V 0-10A

Variable Linear Power Supply GPR-1810HD 0-18V 0-10A

$250.00 $139.95

VOLTEQ GPR-1810HD is a lab grade DC regulated linear power supply. This highly stable, high quality linear DC power…

Programmable Regulated DC Power Supply 30V 5A HY3005P with Output Switch

Programmable Regulated DC Power Supply 30V 5A HY3005P with Output Switch

$300.00 $149.95

For sale is a nice lab grade regulated programmable DC power supply from Quakko, Model number HY3005P. The output o…

Mastech VARIABLE DC POWER SUPPLY 30 V 3A HY3003D-3 TRIPLE OUTPUTS

Mastech VARIABLE DC POWER SUPPLY 30 V 3A HY3003D-3 TRIPLE OUTPUTS

$300.00 $169.95

Note: this product is temporarily out of stock, please check our new model Volteq HY3003D-3. Mastech HY3003…

VARIABLE LINEAR DC POWER SUPPLY GPC-3030D TRIPLE OUTPUTS 30 V 3A

VARIABLE LINEAR DC POWER SUPPLY GPC-3030D TRIPLE OUTPUTS 30 V 3A

$300.00 $169.95

VOLTEQ GPC-3030D is a triple output variable regulated power supply. This linear power supply has three outputs: tw…

REGULATED VARIABLE LINEAR DC POWER SUPPLY HY3010D 30V 10A New Model

REGULATED VARIABLE LINEAR DC POWER SUPPLY HY3010D 30V 10A New Model

$350.00 $169.95

VOLTEQ HY3010D is a lab grade DC regulated linear power supply, an improved version of the HY3010D we carry for yea…

New Model! VOLTEQ VARIABLE DC POWER SUPPLY HY3003D-3 TRIPLE OUTPUTS 30 V 3A

New Model! VOLTEQ VARIABLE DC POWER SUPPLY HY3003D-3 TRIPLE OUTPUTS 30 V 3A

$300.00 $169.95

VOLTEQ HY3003D-3 is the newest update to our triple output variable regulated DC power supply. This linear power su…

Mastech LINEAR DC POWER SUPPLY 30V 5A HY3005F-3 TRIPLE OUTPUTS

Mastech LINEAR DC POWER SUPPLY 30V 5A HY3005F-3 TRIPLE OUTPUTS

$400.00 $199.95

This model is temporarily out of stock, please check out our equivalent model HY3005D-3. Mastech Power Supply …

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