1620

Hammond Mfg. Co. Ltd., Electronics Division www.hammondmfg.com 1620 "CLASSIC" PUSH-PULL TUBE TYPE ULTRA-LINEAR OUTPUT TRANSFORMERS         Designed for push-pull tube output circuits. Enclosed (shielded), 4 slot, above chassis Type "X" mounting. Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. - ref. 1 Khz) minimum. Insulated flexible leads 9" min. Manufactured with plastic coil forms for coil support and insulation. Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output. Due to the unique interleaving of the windings BOTH secondary windings must be engaged to meet specifications (see hook-up diagrams below). Suggested tube types: 6AQ5, 6L6, 6V6 ELECTRICAL SPECIFICATIONS Characteristic Input Impedance Output Impedance Output Power Typical 6600 Ohms 4, 8 & 16 Ohms 20 Watts DCR Primary Brown-Red Primary Red-Blue Secondary Black-Green Secondary Black/Yel-Yel 65.40 Ohms 74.60 Ohms 0.310 Ohm 0.500 Ohm Inductance | Impedance Primary Brown-Red @ 60Hz, 10.0V OC 212H 93KOhm Leakage Inductance Primary Brown-Red @ 60Hz, 10.0V SC 9.20mH Dielectric Strength Temperature Range 2000Vrms -40 To 105C LABEL: 1620 M a d e In C a n a d a 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 BRN BLU BRN/YEL RED BLU/YEL 2.000in ±0.063 Ø0.203 x 0.375 2.500in ±0.063 3.060in ±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. 3.500in 2.488in ±0.063 ±0.063 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 use d 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