1650WA

Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com 1650WA HI-FI AUDIO OUTPUT MULTIPLE SECONDARY TRANSFORMER           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). 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. Included 40% screen taps for Ultra-Linear operation (if desired). Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output. Suggested tube types: 6L6GC, 5881, EL34, 6550B, KT88 ELECTRICAL SPECIFICATIONS Characteristic Input Impedance Output Impedance Output Power Typical 1900 Ohms 4, 8 & 16 Ohms 280 Watts DCR Primary Blue-Red Primary Red-Brown Secondary Black-Green Secondary Black-Yellow Secondary Black-White 15.65 Ohms 17.19 Ohms 0.135 Ohm 0.176 Ohm 0.203 Ohm Inductance | Impedance Primary Brown-Red @ 60Hz, 10.0V OC 156H 76KOhm Leakage Inductance Primary Brown-Red @ 60Hz, 10.0V SC 3.66mH Dielectric Strength Temperature Range 3535VDC -40 To 105C 1650WA Made In Canada DATE 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 (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc.) will change optimum plate to plate load impedance. Only a few of the most popular tubes are shown. As more tubes become available we will add them to the list. A tube manual or tube manufacturer's technical data sheets should be consulted first, before making a decision on a proper output transformer. Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com DIMENSIONAL DETAILS: YEL GRN/YEL BLK/YEL GRN BLK BLU BLU/YEL RED BRN/YEL BRN 3.500in ±0.063 Ø0.275 x 0.615 4.375in ±0.063 7.500in ±0.125 5.875in ±0.063 5.300in ±0.063 TEST CONDITIONS Measurement Instruments: dScope Series III Audio Analyzer Wayne Kerr 3255B with a 3265B Inductance Analyzer HP 4192a LF Impedance Analyzer Keithley 2010 DVM * All graphs input level 27dBu @1.0KHz reference. **The results are typical and are subject to normal manufacturing and electrical tolerances. TYPICAL TEST CIRCUIT PRIMARY R S/ SECONDARY 2 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 used in any manner whatsoever without the written permission of Hammond Manufacturing. Data subject to change without notice. Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com