1645A

Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com 1645A TUBE OUTPUT (30 WATTS) EASY WIRE SECONDARY – ULTRA LINEAR           NEW & improved version of our 1608-1650 Series multiple secondary output transformers (re-designed secondaries for easy hook-up of secondary loads). Designed for push-pull tube output circuits. 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. Enclosed (shielded), 4 slot, above chassis Type "X" mounting. Manufactured with plastic coil forms for coil support and insulation. Frequency response 30Hz. to 30Khz. at full rated power (+/- 1db max. - ref. 1Khz) minimum. Insulated flexible leads 8" min. All units (except the 1650G) include 40% screen taps for Ultra-Linear operation (if desired). Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output. ORN WHT YEL GRN BLK BRN BLU *For Full Dimensional Details see page 4 BRN/YEL RED BLU/YEL Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com 1645A ELECTRICAL SPECIFICATIONS** Schematic and Hook Up Data Characteristic Input Impedance Output Impedance Output Power Typical 5000 4/8/16/70V 30Watts PRIMARY Primary - DCR Blue – Brown Secondary DCR Black – Green Black – Yellow Black – White Black – Orange 276m 391m 464m 9.3 Leakage Inductance Primary – Blue – Brown @ 1.0kHz, 1.0V SC 355.3mH Inductance Primary – Blue – Brown Black – Green Black – Yellow Black – White Black – Orange @ 1.0kHz, 1.0V OC 10.6Hy 135.8mH 219.7mH 322.6mH 759.2mH Impedance Primary – Blue – Brown Black – Green Black – Yellow Black – White Black – Orange @ 1.0kHz, 1.0V OC 65K 246 461 850 3.93K Frequency Response Dielectric Strength Temperature Range See graphs for specific response, Typ. 1.0db from 30Hz to 30KHz 2000Vrms -40 To 105C 167 BLU (PLATE) SCHEMATIC SECONDARY ORN 70V WHT - 16  BLU/YEL (SCREEN Gr) RED B+ BRN/YEL (SCREEN Gr) BRN (PLATE) YEL - 8  GRN - 4  BLK - COM Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com Dimensional Details: Label: 1645A 30WATTS 30Hz - 30KHz BLK - GRN - YEL - WHT - ORN COM - 4OHM - 8OHM - 16OHM - 70V BLU - RED - BRN: 5000 OHMS CT BRN/YEL & BLU/YEL SCREEN TAPS 40% OF PRI VOLTS DATE Made In Canada TYPICAL TEST CIRCUIT PRIMARY R S/ 2 Measurement instruments Hp4192a impedance analyzer Hp3456a DVM Keithley 2002 DVM D scope series iii audio analyzer Wayne Kerr 3255B with a 3265B * All graphs input level 20dbu. ** The results are typical and are subject to normal manufacturing and electrical tolerances. SECONDARY RL R S/ OUT 2 This drawing and the information in it is the property of Hammond Manufacturing. It may not be reproduced, transmitted or use d in any manner whatsoever without the written permission of Hammond Manufacturing. Data subject to change without notice.