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Transformer - One Electron, Output, 4800 Ω to 16/8/4 Ω

Customer image:<br/>"Vogel Instrument Company Class A Special"

Customer image:<br/>"3C24 SE Amp with UBT-2"

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Customer Images:

Customer image: "Vogel Instrument Company Class A Special"

Customer image: "3C24 SE Amp with UBT-2"


SKU:	P-TUBT-2
Item ID:	003629

Price: $129^.95

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The UBT-2 from One Electron is the same size and power (15 watts) as the UBT-1, but has a higher primary impedance suitable for single tubes running at B+ voltages of 400 to 500 volts, such as: 50, WE 300B,etc. It features a paper bobbin. The trade-off of a higher impedance transformer is worse bandwidth, but additional interleaving was added in the UBT-2 to extend the frequency range from 10 Hz to over 55 KHz (at 1 watt). The UBT-2 has also been successfully used as a choke load for shunt-feed output stages. Plate supply voltages over 600 volts are not recommended. 6.0 lbs.

UPC/EAN: 841358110627

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Specifications, Files, and Documents

Specification Sheet

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Product Measurements by Type (click to expand)

Product Measurements by Type
D.C. Primary Current, maximum		110 mA
Item Height		3.75 in.
Item Length		2.85 in.
Item Width		4.25 in.
Mounting Hole Center to Center A		2.25 in.
Mounting Hole Center to Center B		3 in.
Mounting Hole Diameter		0.186 in.
Output Power, maximum		13 W - 18 W
Primary Impedance		4.8 kΩ
Primary Inductance		29 H nominal @ 160 mA
Primary Resistance		432 Ω nominal @ 25°C
Secondary Impedance		4 Ω / 8 Ω / 16 Ω

Packaging Information
Packaging Dimensions		5.75 in. × 4 in. × 3 in.
Weight (Packaging)		5.607 lbs.

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Product Reviews

5.00 out of 5 based on 3 reviews

5 out of 5

Highest quality excellent performance.It works great for my amplifers.

Chang Fu Chien - June 21st, 2020

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5 out of 5

This has to be one of the best transformers made. I was originally experimenting with OTL amplifiers, which are known for their clarity and detailed sound. I decided, though, to go with something simpler, and so bought the UBT3. I was blown away! It sounded better than the several OTLs I experimented with! Clear, detailed, superb bass... what's not to like? I'd strongly recommend this to anyone wanting a output transformer for their amplifier.Great product! Thanks!

Yours Truly - May 1st, 2016