1750C

Hammond Mfg. Co. Ltd., Electronics Division 1750C PRIMARY TUBE GUITAR AMPLIFIER - OUTPUT TRANSFORMER RED • 50 mADC • • • • • 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/-1.0dB reference @ 1KHz) Distortion is less than 1% @ 70Hz SECONDARY BLK COM 5000 Ohm BRN 8000 Ohm BLU YEL 3.2 Ohm 5 WATTS 70Hz - 15kHz BLK ELECTRICAL SPECIFICATIONS Characteristics Input Impedance Output Impedance Output Power Max PRI DC Typical 5000/8000 Ohms 3.2 Ohms 5W 50mA DCR Primary Red-Brown Primary Brown-Blue Secondary Black-Yellow 255.84 Ohms 73.89 Ohms 0.295 Ohm Inductance Impedance Primary Red-Brown Primary Red-Blue Secondary Black-Yellow @ 1.0 kHz, 1.0 V OC 14.25H 84.12 KOhm 20.42H 122.68 KOhm 64.53 mH 154.90 Ohm RE DA TE C DB 5 BL RN - WA K - B TT YE LU: S L: 7 5 3.2 000 0Hz /8 -1 MA 0 5 DE  00  kHz 50 IN mA CA DC NA DA 17 50 C YEL B RED BRN A BLU D G NOTE: ALL LEADS 9" LONG MIN. Leakage Inductance Primary Red-Brown Primary Red-Blue @ 1.0 kHz, 1.0 V SC 54.28 mH 74.48 mH Dielectric Strength Temperature Range 1500VRMS -40 to 105 degC Dimensions A 2.813” ±0.063 B 1.560” ±0.125 C D 1.683” ±0.063 2.375” ±0.063 G 0.187” ±0.015 TYPICAL TEST CIRCUIT Measurement instruments: D scope series iii audio analyzer Wayne Kerr 3255B with a 3265B TEST CONDITIONS PRIMARY R S/ 2 Keithley 2010 DVM Hp4192a impedance analyzer * All graphs input level 27dBu @1.0KHz reference. **The results are typical and are subject to normal manufacturing and electrical tolerances. SECONDARY RL R S/ OUT 2 Release 2: 02.12.2021 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