The UBT-1 from One Electron is a low-impedance single-ended output transformer intended for parallel combinations of tubes running a B+ voltages of 250 to 325 volts, such as: two or three EL34s (triode connected), three 2A3s, two 300Bs, two 6AS7s, etc., as well as single sweep tubes run in 'enhanced-triode' mode, resulting in 10 to 15 watts of output power.
Custom manufactured to replace most 6 and 7 tube sets of the early 1930s. Supplied with vertical mounting shells. Provides a seperate filament winding for audio output stages. Specifications Rating: 350-0-350 V, 70 or 90 mA (if 5 V winding is used with 2 A rectifier) Windings: 5 V, 3 A; 2.5 V, 7.5 A; 2.5 VCT, 3.5 A Mounting Centers:2 x 2.625" Weight: 4.2 lbs. Overall Height: 3.12"
Universal primary with taps for 100, 120, 220 or 240 VAC, 50 / 60 Hz. (Except the 260A6 which is 117V, 50/60 Hz only)
Designed for preamps, low power amps, general replacement, test equipment, etc.
Economical, open frame, chassis mount - two hole (.187 dia. = G) channel bracket (figure #1) or four hole mounting (figure #2).
Units include a Faraday shield between the primary and secondary windings. Our electrostatic shield reduces the capacitive coupling from the primary - greatly attenuating higher frequency current coupling to the secondaries.
Minimum 5" long leads.
For more selection check out our P-T300-X series of universal plate & filament transformers.
Studio Grade Impedance Matching, 1140 Series. Designed with Nickel alloy cores for high performance and Wide Bandwidth. Frequency Response: 20 Hz – 20 kHz ±0.35 dB, (ref. @ 1 kHz). Low distortion at levels up to +27 dBu @ 20 Hz. Excellent Shielding – Mu Metal enclosures
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