Hammond 1627SEA 30W Single-Ended Tube Output Transformer, 2500 Ohm

The 1627SEA is a 30 watt single ended output transformer with a 2500 ohm primary rated for 160 mA of DC bias. It targets hi-fi builders working with classic power triodes such as the 2A3, 6A3, 6B4G and 300B, or with pentodes and beam tubes including the 6CA7, 6L6, 807, 5881 and 6550, plus parallel 6AQ5, 6V6 or EL84.

The 1627-1642 Series is "over designed" for high fidelity, single ended, Class-A tube output circuits. Each transformer is enclosed (shielded) and uses high quality (M6) grain oriented silicon steel laminations, with a gapped core to reduce core saturation in Class-A amplifier circuits. Insulated flexible leads are 8" minimum, and the case uses four slot, chassis Type "X" mounting with 0.20 x 0.38 in (5 x 10 mm) slots.

The secondary offers 4, 8 and 16 ohm taps, and a 40% screen tap supports optional Ultra-Linear operation. Primary inductance is listed at 20 Henrys. Typical drawing values include 77.5 ohm primary DCR, 7.94 Hy primary inductance and 49.5 k primary impedance at 1 kHz, 1 V, with secondary DCR of 413, 517 and 724 milliohms. Frequency response is at least 20 Hz to 20 kHz at full rated power (+/- 1 dB max., ref. 1 kHz); hipot test is 2000 VRMS and the temperature range is -40 to 105C.

Overall dimensions are A 3.75 in (95 mm), B 4.94 in (125 mm), C 4.56 in (116 mm), D 3.00 in (76 mm) and E 3.81 in (97 mm), with a weight of 11 lbs (4.99 kg). Made in Canada. RED connects to B+, BLUE to the plate and BLUE/YELLOW to the screen. RoHS and REACH compliant, UPC 623980008363.