The 211 tube, also known as UV-211 or VT-4B, is a directly heated audio triode mainly used as a power tube in high-fidelity audio amplifiers and radio transmitters. Introduced in the 1930s, it is prized for its ability to handle high anode voltages and cathode currents, delivering remarkable output power with low distortion. This high-quality tube is ideal for top-grade audio applications. In single-ended Class A1 it reaches about 20 W RMS, while in push-pull Class B it can deliver up to 260 W of output power.
Introducing the SE211-A1 Transformer:
We are pleased to present our SE211-A1 single-ended output transformer, specially designed for 211 / VT-4B tubes. With a primary impedance of 12 k? and secondary taps of 4/6/8 ?, it is rated for a maximum output of 20 W RMS.
Practical Experience:
To view detailed performance data of the SE211-A1 transformer, please refer to the attached bandwidth graph image. For optimal system configuration, we also recommend exploring our dedicated filament choke for 211 tubes, available on our product page.
Discover the power and versatility of the 211 tube with our SE211-A1 transformer. Thanks to its reliable performance and superb sound quality, it will turn your listening sessions into an unprecedented musical journey.
Images are for illustration only and may not exactly match the product. Items listed may benefit from quantity discounts. When ordering output transformers together with other components such as chokes or power transformers on this site, you can enjoy significant savings compared to the individual unit cost, as illustrated below.
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(*) This does not exclude use with other tubes. |
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Dimension guide
