Hammond Mfg. Co. Ltd., Electronics Division
www.hammfg.com
1760J
•
•
•
•
•
•
PRIMARY
SECONDARY
BRN
TUBE GUITAR AMPLIFIER - OUTPUT TRANSFORMER
BLK
COM
GRN
4 Ohm
YEL
8 Ohm
4000 CT
Ohm
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/-1.5dB reference @ 1KHz)
Distortion is less than 1% @ 70Hz
RED
WHT 16 Ohm
BLU
70Hz - 15kHz
40 WATTS
BLK
ELECTRICAL SPECIFICATIONS
Characteristics
Input Impedance
Output Impedance
Output Power
DCR
Primary Brown-Blue
Secondary Black-Green
Secondary Black-Yellow
Secondary Black-White
Inductance Impedance
Primary Brown-Blue
Leakage Inductance
Brown-Blue
Dielectric Strength
Temperature Range
GRN
Typical
4000 Ohms
4, 8 & 16 Ohms
40W
185.0 Ohms
0.356 Ohm
0.502 Ohm
0.910 Ohm
@ 1.0 kHz, 1.0 V OC
19.5H
124KOhm
@ 1.0 kHz, 1.0 V SC
35.93mH
1500VRMS
-40 to 105 degC
B
DA LK/G B
TE
R N R N 40 W
/YE - R AT
L/W ED TS
M A H T - BL 70
DE : C U: Hz
IN OM 400 - 15
CA /4 0 kH
NA
z
DA /8 /1C T
6
17
C
HA
MA MM O
NU ND
FA
CT
U
RIN
60
J
YEL
WHT
B
G
BLU
RED
A
D
G
BRN
NOTE: ALL LEADS 9" LONG MIN.
Dimensions
A 4.000” ±0.063
B 2.80" REF
C 2.63" MAX
D
G
3.560” ±0.063
0.187” ±0.015
TYPICAL TEST CIRCUIT
TEST CONDITIONS
Measurement instruments:
D scope series iii audio analyzer
Wayne Kerr 3255B with a 3265B
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.
PRIMARY
R S/
SECONDARY
2
RL
R S/
OUT
2
Release 2: 03.03.2021
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
