Hammond Mfg. Co. Ltd., Electronics Division
www.hammondmfg.com
1615A
HI-FI AUDIO OUTPUT MULTIPLE SECONDARY TRANSFORMER
NEW & improved version of our 1608-1650 Series multiple secondary output transformers
(Re-designed secondaries for easy hook-up of secondary loads).
Designed for push-pull tube output circuits.
Units are designed to provide ample "headroom" at bass frequencies
(Note the weight of each transformer).
All models have a secondary tapped for 4, 8 or 16 ohm outputs.
Enclosed (shielded), 4 slot, above chassis Type "X" mounting.
Manufactured with plastic coil forms for coil support and insulation.
Frequency response 30Hz. to 30Khz. at full rated power (+/- 1db max. - ref. 1Khz) minimum.
Insulated flexible leads 8" min.
Included 40% screen taps for Ultra-Linear operation (if desired).
Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output.
WHT
YEL
GRN
BLK
BRN
BRN/YEL
RED
BLU/YEL
BLU
*For Full Dimensional Details see page 4
Hammond Mfg. Co. Ltd., Electronics Division
www.hammondmfg.com
ELECTRICAL SPECIFICATIONS**
Schematic and Hook Up Data
Characteristic
Input Impedance
Output Impedance
Output Power
Primary - DCR
Blue – Brown
Secondary DCR
Black – Green
Black – Yellow
Black – White
Typical
5000
4/8/16
15Watts
PRIMARY
181.8
WHT - 16
193m
307m
379m
Inductance
Primary – Blue – Brown
Black – Green
Black – Yellow
Black – White
@ 1.0kHz, 1.0V OC
7.5Hy
70.2mH
125.9mH
210.4mH
Impedance
Primary – Blue – Brown
Black – Green
Black – Yellow
Black – White
@ 1.0kHz, 1.0V OC
46.6K
186.4
356.3
612.8
Frequency Response
Dielectric Strength
Temperature Range
BLU
(PLATE)
SCHEMATIC
SECONDARY
See graphs for specific
response, Typ. 1.0db from
30Hz to 30KHz
2000Vrms
-40 To 105C
BLU/YEL
(SCREEN Gr)
YEL - 8
RED B+
BRN/YEL
(SCREEN Gr)
BRN
(PLATE)
GRN - 4
BLK - COM
Hammond Mfg. Co. Ltd., Electronics Division
www.hammondmfg.com
Hammond Mfg. Co. Ltd., Electronics Division
www.hammondmfg.com
Dimensional Details:
Label:
1615A
15WATTS 30Hz - 30KHz
BLK - GRN - YEL - WHT
COM - 4OHM - 8OHM - 16OHM
BLU - RED - BRN: 5000 OHMS CT
BRN/YEL & BLU/YEL
SCREEN TAPS 40% OF PRI VOLTS
DATE
Made In Canada
TYPICAL TEST CIRCUIT
PRIMARY
R S/
2
Measurement instruments
Hp4192a impedance analyzer
Hp3456a DVM
Keithley 2002 DVM
D scope series iii audio analyzer
Wayne Kerr 3255B with a 3265B
* All graphs input level 20dbu.
** The results are typical and are subject to normal manufacturing and electrical tolerances.
SECONDARY
RL
R S/
OUT
2
This drawing and the information in it is the property of Hammond Manufacturing. It may not be reproduced, transmitted or use d in any manner whatsoever without the written permission of
Hammond Manufacturing. Data subject to change without notice.
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