Single Ended Audiophile - Tube Output (1627-1642 Series) Tube Audio SINGLE-ENDED "CLASSIC" TUBE OUTPUT - ULTRA-LINEAR • "Over designed" for high-fidelity, single ended, Class-A, tube output circuits (triode, tetrode or pentode tubes). • Enclosed (shielded), four slot, chassis Type "X" mounting. • Frequency response at least 20 Hz. to 20 KHz. at full rated power (+/- 1 db max., ref. 1 Khz.) • Units are designed to provide ample "headroom" at bass frequencies (note the weight of each transformer). • All models have a secondary tapped for 4, 8 or 16 ohm outputs. • Insulated flexible leads 8" min. • For maximum versatility, all units (except the 1642SE & 1638SEA) include a 40% screen tap for Ultra-Linear, tetrode/pentode operation (if desired). • The 1642SE & 1638SEA do NOT include a screen tap as they were designed principally for high impedance triode tubes. • High quality laminations, (M6) grain oriented silicon steel. • Core is gapped to reduce core saturation in Class-A, tube amplifier circuits. • For general purpose or replacement use in single ended, tube output circuits see our 125 "SE" series. Primary Part Number Audio Watts Impedance 1640SEA 1627SEA 1630SEA 1628SEA 1642SE 1629SEA 1638SEA 30 30 30 30 75 30 30 1,250 2,500 3,500 5,000 5,000 6,500 10,000 Max. DC Bias 200 ma. 160 ma. 135 ma. 120 ma. 300 ma. 100 ma. 90 ma. Inductance Henrys 14 20 42 48 53 55 88 Hipot Test (VRMS) A B C D E Yes Yes Yes Yes No Yes No 2,000 2,000 2,000 2,000 3,500 2,000 2,000 3.75 3.75 3.75 3.75 4.38 3.75 3.75 4.95 4.50 4.98 4.50 7.50 4.50 4.50 4.56 4.56 4.65 4.56 5.25 4.56 4.56 3.00 3.00 3.00 3.00 3.50 3.00 3.00 3.90 3.13 3.90 3.13 5.88 3.88 3.13 CANADA © Wt. G Lbs. Slot .203 x .375 11 .203 x .375 11 .203 x .375 11 .203 x .375 11 .203 x .375 28 .203 x .375 11 .203 x .375 11 EUROPE Guelph, Ontario (519) 822-2960 St. Laurent, Quebec (514) 343-9010 www.hammondmfg.com Cheektowaga, NY (716) 630-7030 86 USA Dimensions (Inches) Ultra-Linear 40% Primary Tap Basingstoke, UK 01256 812812 AUSTRALIA Queenstown, Australia 61-8-8240-2244 Single Ended Audiophile - Tube Output (1627-1642 Series) Suggested Tube Types Part No. Triodes 1640SEA Parallel - 2A3, 6A3, 6B4G, 300B, 572B, 811A Pentodes 1627SEA 2A3, 6A3, 6B4G, 300B 1630SEA 2A3, 6A3, 6B4G, 300B 1628SEA 211, 300B, 572B, 811A 1642SE Parallel - 211, 572, 811A, 845 1629SEA 211, 811A, 572B, 845 1638SEA 211, 845 Parallel - 6550, 6CA7 6CA7, 6L6, 807, 5881, 6550, Parallel - 6AQ5, 6V6, EL84 6CA7, 6L6, 807, 5881, 6550, Parallel - 6AQ5, 6V6, EL84 6AQ5, 6V6, 6L6, 807, 5881, 6550, EL84 6AQ5, 6V6, 6L6, 807, 5881, 6550, EL84 - Note: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. How you operate the tubes (ultra-linear, bias, plate voltage, operating points etc.) will change optimum plate load impedance. Only a few of the most popular tubes are shown. A tube manual or tube manufacturer's technical data sheets should be consulted first, before making a decision on a proper output transformer. Transformer Schematic Red (B+) Blue/Yell (Screen) Tube Audio White (16) Yellow (8) Green (4) Blue (Plate) Black (0) PRI SEC Notes: - The 1642SE and 1638SEA do not include a primary screen tap (as they are designed for triode applications). - Red wire connects to B+ - Blue/Yell wire connects to screen (optional use) - Blue wire connects to tube plate EUROPE Basingstoke, UK 01256 812812 AUSTRALIA Queenstown, Australia 61-8-8240-2244 CANADA www.hammondmfg.com Guelph, Ontario (519) 822-2960 St. Laurent, Quebec (514) 343-9010 87 Cheektowaga, NY (716) 630-7030 USA ©