1760L

Hammond Mfg. Co. Ltd., Electronics Division www.hammfg.com 1760L PRIMARY TUBE GUITAR AMPLIFIER - OUTPUT TRANSFORMER • • • • • • Designed for drop in replacement of original units. Constructed to look similar to original factory units (where possible). Material used & design specifications were kept as close as possible to the original part to preserve the stock "tone". Open style with minimum 9" long primary and secondary leads Frequency response 70Hz - 15KHz (0/-1dB reference @ 1KHz) Distortion is less than 2% @ 70Hz SECONDARY WHT 16 Ohm BLU 4200 CT RED Ohm BRN YEL 8 Ohm BLK 4 Ohm GRN COM 70Hz - 15kHz 50/60 Watts ELECTRICAL SPECIFICATIONS Characteristics Input Impedance Output Impedance Output Power Typical 4200 Ohms 4, 8 & 16 Ohms 50/60W -1 5 46.48 Ohm 51.04 Ohm 0.238 Ohm 0.405 Ohm 0.578 Ohm B z 6  E /1 DAT T N: OM W A -B R : C / 6 0 E D HT 5 0 LU-R EL/W ADA B K/Y AN L C IN N/ B GR ADE M YEL DCR Primary Brown-Red Primary Red-Blue Secondary Green-Black Secondary Green-Yellow Secondary Green-White kH L z 60 70H CT /8 17 T S 4200 /4  WHT C BLK G RIN D ON CTU MM FA HA ANU M BLU RED GRN D E A BRN F Inductance Impedance Primary Brown-Blue Secondary Green-Black Secondary Green-Yellow Secondary Green-White @ 1.0 kHz, 1.0 V OC 5.72 H 36.4 KOhm 9.31 mH 66.26 Ohm 18.15 mH 126.85 Ohm 34.23 mH 233.5 Ohm Leakage Inductance Primary Brown-Blue @ 1.0 kHz, 1.0 V SC 3.506 mH Dielectric Strength Temperature Range 2828VDC -40 to 105 degC TEST CONDITIONS Measurement instruments: D scope series iii audio analyzer Wayne Kerr 3255B with a 3265B G NOTE: ALL LEADS 9.0" OUT MIN. Dimensions A 4.063” ±0.063 B 3.150” ±0.125 C 3.500” ±0.063 D 3.500” ±0.063 1.955” ±0.063 2.480” ±0.063 0.180” X 0.300" ±0.015 TYPICAL TEST CIRCUIT PRIMARY Keithley 2010 DVM Hp4192a impedance analyzer E F G R S/ SECONDARY 2 RL * All graphs input level 27dBu @1.0KHz reference. **The results are typical and are subject to normal manufacturing and electrical tolerances. R S/ OUT 2 www.hammfg.com 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. www.hammfg.com Release 2: 01.18.2022 www.hammfg.com