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Transformer - One Electron, Output, 4800 Ω to 16/8/4 Ω
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.
| 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 Dimensions | 5.75 in. × 4 in. × 3 in. | |
| Weight (Packaging) | 5.607 lbs. |
 Specification Sheet | All Models |
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