Hammond Mfg. Co. Ltd., Electronics Division
www.hammondmfg.com
1750R
PRIMARY
TUBE GUITAR AMPLIFIER - OUTPUT TRANSFORMER
•
•
•
•
•
•
SECONDARY
ORG
COM
BRN
Designed for drop in replacement of original
2000
Ohm
units such as Yorkville/Traynor 1 98694 (A1301)
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 50Hz - 12KHz
(0/-1dB reference @ 1KHz)
Distortion is less than 1% @ 50Hz
CT
YEL
4 Ohm
RED
GRN 8 Ohm
BLU
BLK
16 Ohm
50Hz-12kHz
100 W
B
R
50 2kHz C T
17 50H z - 21000
ELECTRICAL SPECIFICATIONS
Characteristics
Input Impedance
Output Impedance
Output Power
Typical
2000 Ohms
4, 8 & 16 Ohms
100 W
Y EL
DA
TE
GRN
C
DCR
Primary Blue-Brown
Secondary Black-Orange
25.72 Ohms
0.222 Ohm
Inductance Impedance
Primary Blue-Brown
Secondary Black-Green
Secondary Black-Yellow
Secondary Black-Orange
@ 1.0 kHz, 1.0 V OC
4.84H
31.2K Ohm
16.20mH
117.05 Ohm
31.28mH
219.30 Ohm
58.48mH
400.60 Ohm
Leakage Inductance
Primary Blue-Brown
@ 1.0 kHz, 1.0 V SC
11.37 mH
Dielectric Strength
Temperature Range
2250VRMS
-40 to 105 degC
TEST CONDITIONS
Measurement instruments:
D scope series iii audio analyzer
Wayne Kerr 3255B with a 3265B
:
TS - BR NN: 4 6
AT
R :1 A
0W ED , G
1 0 - R O M , O RG NA D
U
C
A
B L LK : : 8 I N C
B EL
DE
Y
MA
ORG
BLK
BLU
E
D
Dimensions
A 3.750” ±0.063
B 3.936” ±0.125
C
D
4.560" MAX
3.000” ±0.063
E
G
1
BRN
2.813” ±0.063
0.203 X 0.375 ” ±0.015
TYPICAL TEST CIRCUIT
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.
RED
G
NOTE: ALL LEADS 9" OUT MIN., STRIPPED .5"
PRIMARY
Keithley 2010 DVM
Hp4192a impedance analyzer
A
R S/
OUT
2
DISCLAIMER: Hammond Mfg. is not affiliated with Fender Musical Instruments Corp., Marshall Amplification, Yorkville/Traynor, AMPEG or VOX Amplification companies.
Amplifier model names are trademarks of the amplifier companies and are just listed here for reference purpose only.
www.hammondmfg.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.hammondmfg.com
