SKU: 8963897866

Universal Filament Regulator

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Description

Universal Filament RegulatorThe Universal Filament Regulator is a power supply that features ultra low output noise. It is intended for powering heaters and filaments in vacuum tube amplifiers but it also serves in other applications where a low noise power supply is needed. Such applications include high end DACs and Raspberry Pi media streamers. A regulated filament supply results in a dramatic reduction in mains hum in tube amps. The result is complete silence between tracks

The Universal Filament Regulator is a power supply that features ultra-low output noise. It is intended for powering heaters and filaments in vacuum tube amplifiers but it also serves in other applications where a low-noise power supply is needed. Such applications include high-end DACs and Raspberry Pi media streamers.

A regulated filament supply results in a dramatic reduction in mains hum in tube amps. The result is complete silence between tracks and a much cleaner tone. This is especially true when used in combination with the 21st Century Maida Regulator.

Technical Documentation

  • Description
  • Specifications
  • Performance Graphs

  • This sixth revision of the Universal Filament Regulator takes an 8-17 AC input from a transformer and provides a DC output voltage in the range of 0.8-21 V, selectable in 0.1 V increments by rotary switches. It can also operate with a DC input voltage (8.0-24 V).

    The Regulator can provide up to 6 A of output current and up to 70 W of output power. The output current can be limited to 3 A by fitting a jumper. The built-in soft start ensures a gentle startup suitable even for fragile directly heated triode (DHT) filaments.

    The Universal Filament Regulator is a buck/boost regulator, which means it can provide the full output voltage range as long as its input voltage is within the specified range. That said, the best noise performance is obtained when the input voltage is higher than the output voltage.

    The Universal Filament Regulator is a high-efficiency, switching power supply. The switching frequency is 400 kHz – well above the audio band. Furthermore, it uses spread spectrum dithering to further minimize switching noise and EMI. It offers the same sonic benefits as linear regulators, including constant current regulators, without any of the bulk.

    The four-layer circuit board with 2 oz (70 µm) copper thickness requires no heat sink and will fit just about anywhere with its diminutive size (76.5 x 45.0 x 24.0 mm).

    The Universal Filament Regulator is Made in Canada.

  • The specifications for the Universal Filament Regulator Rev. 6.0 are tabulated below.

    Parameter Value Notes
    Absolute max. input voltage 17.6 V RMS, AC
    Input voltage range 8.0 - 17 V RMS, AC
    Input voltage range 8.0 - 24 V DC
    Output voltage range 0.8 - 21 V Selectable by rotary switch
    Output voltage tolerance ±2 %
    Output current limiter 3 A, 6 A Typical, jumper selectable
    Minimum load current 0 A
    Max. output power 70 W
    Output noise 3.0 mV, RMS Vin > Vout, 800 kHz BW
    Output impedance 1.2 mΩ
    		 Vin < Vout, DC
    Output impedance 1.7 mΩ
    		 Vin > Vout, DC
    Line Regulation 68 dB Vin < Vout, DC
    Line Regulation 78 dB Vin > Vout, DC
    Switching frequency
    		 400 kHz
    		 Spread-spectrum
    Dimensions & weight

    76.5 x 45.0 x 24.0 mm

    55 g

  • The Universal Filament Regulator Rev. 6.0 operates with very high efficiency, especially at the higher output power levels. The graph below shows the efficiency vs output power for both boost (Vout > Vin) and buck (Vout < Vin) mode.

    The Regulator provides the lowest output noise when its input voltage is higher than its output voltage. This is shown below.

    The output noise is a bit higher when the Regulator operates in boost mode as seen below.

    Note, however, that the output noise is actually quite low - only a few mV - in either operating mode.

    The measurement below shows the change in output voltage as the load current is changed from 0.5 A to 1 A in boost and buck mode, respectively. As seen, the regulator responds to the changing load very quickly and without tendency to overshoot.

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SKU: 8963897866

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Effective for dry mouth
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I love this. It’s great for dry mouth and it makes your breath smell good too
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Reviewed in the United States on May 31, 2026
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Pricey but great for people who need something gently on the tongue or mouth
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Great alternative to traditional Toothpaste. Its a bit pricey but if you are like me you dont have to share it with anyone else because they can use regular toothpaste. The minty flavor is subtle but does not cause irritation. Easy to just just like regular toothpaste. it doesnt have any whitening in it but is a comfort for those that need a toothpaste gently on the tongue or mouth. Still does the job
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Barbmom
Los Angeles, US
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Wonderful book
Format: Hardcover
Alan Schore is a gifted reseacher and this book is a great addition to the field espeically for those of us that work with non verbal treatment.
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Reviewed in the United States on July 11, 2019
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Fr. Charles Erlandson
West Palm Beach, US
★★★★★ 5
Possibly the Most Important Theological Work of the 20th Century
Format: Paperback
Pope John Paul II's "Man and Woman He Created Them," popularly known as "A Theology of the Body" may be the most important theological work of the 20th century. I say this because John Paul II is not only a first-rate theologian but also because "Theology of the Body" strikes at the heart of a series of related issues that desperately need addressing today. "Theology of the Body" begins with the Pope's Trinitarianism, a fundamental doctrine that Christians often don't know what to do with. At the heart of his thinking, and all true Christian thinking, is God's self-giving love that is rooted in the Trinity. "Theology of the Body" also explores the nature of what it means to be human and made in the image of God. The book is titled "Man and Woman He Created Them" because it is especially in the relationship between a man and his wife that the relational and loving identity of God is revealed in humanity. Throughout, the Pope reaffirms the essential goodness of the human body. "Theology of the Body" is thus a profound theological work that I highly recommend to pastors, teachers, and educated laymen. Be aware: it's not an easy read! But a patient and thoughtful reading of "Theology of the Body" will, in time, become a blessing to the reader. One of the reasons it remains such a timely work is that it confronts some of the Gnostic tendencies in the Church today that spiritualize things and tend to downplay the significance and basic goodness of the body. At a time when humanistic and distorted views of human sexuality and identity abound, "Theology of the Body" provides an intelligent and profound rationale for the biblical, Christian meaning of sex, the body, and being made in the image of God. While Protestants may think that a work written by a Pope would be too Roman Catholic for them, in reality "Theology of the Body" is a work for the whole Church and all Christians. The book is filled with profound and rare insight into who God is and who man is. It will help to complete the theology of most Christian readers and also has important practical implications. Because the book was originally an extended series of lectures at times it can be unwieldy and difficult to comprehend. Sometimes it's difficult to understand what the Pope means in certain sections, since his writing is often dense. In spite of the difficulty in reading, it's well worth the effort. Because of the depth and difficulty of the work, some have found it beneficial to also read "Theology of the Body for Beginners" by Christopher West.
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Daniel Francis Good
Whiting, US
★★★★★ 5
Excellent
Format: Paperback
While some readers may find John Paul II's writing style a bit circular or highly philosophical, the message presented in this text will change your life. Still, it is not easy reading. It is a collection of 129 audiences given by John Paul II commonly called the Theology of the Body. The audiences are based on Sacred Scripture. In this new translation audiences that were not delivered are now included. The Theology of the Body treats sexuality, marriage, celibacy, anthropology, family life, responsible parenthood, the wound of sin, redemption, and the resurrection of the body. This book is in my top five of best books. I have read both translations and Michael Waldstein's is much easier to read than the first edition. The new headers at the beginning of each section that directly indicate what is being dealt with in the text. The introduction that Waldstein provides gives a theological and philosophical vision for understanding the text. This book is worth your time. It stands against the culture of death and promotes the Gospel of Jesus Christ. It holds the answers the hunger that society is so desperately grasping at. If you don't know much about the Theology of Body it would prove useful to read an introductory text by West, Hogan, or Percy & Schmitz. Christopher West, who is properly described as a catechist, has excellent presentations on the Theology of the Body in DVD and CD format that could prove helpful to a first time reader. On a personal note: The Theology of the Body has helped me so much. I am in Holy Orders and I don't think I would be where I am except for this message (and God's grace and His will). This isn't some message that you can simply read and understand - it is something that you have to approach with an open heart and mind with prayer. I really hope you read this book and promote it's message.
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Reviewed in the United States on September 28, 2009

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