Hammond Mfg. Co. Ltd., Electronics Division
www.hammondmfg.com
1750NA
PRIMARY
TUBE GUITAR AMPLIFIER - OUTPUT TRANSFORMER
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•
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Designed for drop in replacement of original
6000
Ohm
units such as Marshall1 JTM30/60 (Drake 292-772 )
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".
Frequency response 70Hz - 15KHz
(0/-1dB reference @ 1KHz)
Distortion is less than 1% @ 70Hz
CT
18
12
COM
17
10
8 Ohm
16 Ohm
8
14
50Hz-12kHz
30 WATT
A
H
17
50
NA
12
MA
D
P
Pinin 12 E IN
12 - P CAN
10
- P in 1
in 0: ADA
8:
16 8
8
ELECTRICAL SPECIFICATIONS
Characteristics
Input Impedance
Output Impedance
Output Power
SECONDARY
Typical
6000 Ohms
8 & 16 Ohms
30 W
TE
DA
7
D
J
C
B
13
DCR
Primary 18-14
Secondary 12-10 (8 Ohm)
Secondary 12-8 (16 Ohm)
Inductance Impedance
Primary 18-14
Secondary 12-10 (8 Ohm)
Secondary 12-8 (16 Ohm)
147.36 Ohms
0.580 Ohm
0.820 Ohm
E
E
@ 1.0 kHz, 1.0 V SC
10.26 mH
Dielectric Strength
Temperature Range
2500VRMS
-40 to 105 degC
TEST CONDITIONS
18
E
@ 1.0 kHz, 1.0 V OC
8.00H
49.78K Ohm
37.8mH
410.3 Ohm
76.64mH
716.6 Ohm
Leakage Inductance
Primary 18-14
Measurement instruments:
D scope series iii audio analyzer
Wayne Kerr 3255B with a 3265B
E
G
13
Pin
18
-P
14
in
17
-
BOTTOM LABEL
Pin
1
4:
17
60
00
18
CT
Dimensions
A
3.000” ±0.063 C
2.465” ±0.063 E
0.300” ±0.030 H
2.500” ±0.063
B
2.500” ±0.125 D
1.600” ±0.063 G
0.219” ±0.063 J
2.000” ±0.063
TYPICAL TEST CIRCUIT
PRIMARY
Keithley 2010 DVM
Hp4192a impedance analyzer
17
50
NA
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.
1
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
