Push - Pull
Audiophile - Output (1608-1650 "A" Series)
PUSH - PULL "EASY HOOK-UP"
"CLASSIC" TUBE TYPE - ULTRA-LINEAR
OUTPUT TRANSFORMERS
•
NEW & Improved version of our 1608-1650 series output transformers (re-designed secondaries for easy hook-
up of secondary loads)
•
Designed for push-pull tube output circuits.
•
Enclosed (shielded), 4 slot, above chassis Type "X" mounting.
•
Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. - ref. 1 Khz) minimum. Except the
1650E (70 Hz. to 30 Khz. +/- 1 db max. - ref. 1 Khz.)
• Insulated flexible leads 8" min.
•
All units (except the 1650G) include 40% screen taps for Ultra-Linear operation (if desired).
•
Typical applications - Push-Pull: triode, Ultra-Linear pentode, and tetrode connected audio output. The 1650G
does NOT have primary screen taps and will not support "Ultra-Linear" applications.
Part
Number
1608A
1609A
1615A
1650E
1620A
1650FA
1645A
1650G
1650HA
1650KA
1650NA
1650PA
1650RA
1650TA
1650WA
Audio
Watts
(RMS)
10
10
15
15
20
25
30
35
40
50
60
60
100
120
280
Primary
Max. DC
Impedance Per Side
8,000 C.T.
10,000 C.T.
5,000 C.T.
8,000 C.T.
6,600 C.T.
7,600 C.T.
5,000 C.T.
6,600 C.T.
6,600 C.T.
3,400 C.T.
4,300 C.T.
6,600 C.T.
5,000 C.T.
1,900 C.T.
1,900 C.T.
100 ma.
100 ma.
100 ma.
100 ma.
158 ma.
128 ma.
128 ma.
200 ma.
200 ma.
318 ma.
318 ma.
200 ma.
318 ma.
403 ma.
806 ma.
Secondary
Impedance
4-8-16
4-8-16
4-8-16
4-8-16
4-8-16
4-8-16
4-8-16-70 V
3.5/8/16/250/500
4-8-16
4-8-16
4-8-16
4-8-16
4-8-16
4-8-16
4-8-16
Dimensions (Inches)
A
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.13
3.13
3.13
3.13
3.13
3.75
3.75
4.38
B
2.75
2.75
3.25
3.25
3.50
3.50
3.75
3.75
4.00
4.00
4.25
4.25
4.25
4.50
7.50
C
3.06
3.06
3.06
3.06
3.06
3.06
3.06
3.81
3.81
3.81
3.81
3.81
4.56
4.56
5.25
D
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.50
E
+/- 1/16”
G
Slot
Tube Audio
Wt.
Lbs.
2.5
2.5
3.25
3.5
3.5
4
4.5
5
6.5
7
8
8
12
14
28
1.69
1.69
2.19
2.50
2.44
2.44
2.69
2.25
2.69
2.69
2.94
2.94
3.06
3.31
5.88
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
.203 x .38
Guelph, Ontario (519) 822-2960
St. Laurent, Quebec (514) 343-9010
©
Cheektowaga, NY (716) 630-7030
CANADA
USA
www.hammondmfg.com
Basingstoke, UK 01256 812812
Queenstown, Australia 61-8-8240-2244
EUROPE
92
AUSTRALIA
Push - Pull
Audiophile - Output (1608-1650 "A" Series)
Suggested Tube Types
Part
Number
1608A
1609A
1615A
1650E
1620A
1650FA
1645A
1650G
1650HA
1650KA
1650NA
1650PA
1650RA
1650TA
1650WA
Audio Watts
(RMS)
10
10
15
15
20
25
30
35
40
50
60
60
100
120
280
Primary
Impedance
8,000 C.T.
10,000 C.T.
5,000 C.T.
8,000 C.T.
6,600 C.T.
7,600 C.T.
5,000 C.T.
6,600 C.T.
6,600 C.T.
3,400 C.T.
4,300 C.T.
6,600 C.T.
5,000 C.T.
1,900 C.T.
1,900 C.T.
Operation
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull (2 Tubes)
Push-Pull Par. (4 Tubes)
Push-Pull Par. (2 or 4 Tubes)
Push-Pull (2 Tubes)
Push-Pull Par. (2 or 4 Tubes)
Push-Pull Par. (4 or 6 Tubes)
Push-Pull Par. (6 or 8 Tubes)
Tube Types
6AQ5, 6V6, 6BQ5, EL84, SV83
6AQ5, 6V6, 6BQ5, EL84, SV83
2A3, 6A3, 6AQ5, 6B4G, 6L6, 6V6
6AQ5, 6V6, 6BQ5, EL84, SV83
6AQ5, 6L6, 6V6
6L6GC, 6V6, 807, 5881, EL34
6L6GC, 6V6, 807, 5881, EL34
6L6GC, 807, 5881, EL34
6L6GC, 807, 5881, EL34
6L6GC, 807, 5881, EL34, 6146B, 6550B
6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88
6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88
807, 5881, EL34, 6146B, 6550B, KT88
6L6GC, 5881, EL34, 6550B, KT88
6L6GC, 5881, EL34, 6550B, KT88
Note: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. How
you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc.) will change optimum plate to plate load
impedance. Only a few of the most popular tubes are shown. As more tubes become available we will add them to the list. A tube manual or tube
manufacturer's technical data sheets should be consulted first, before making a decision on a proper output transformer.
Schematic
All Parts Except 1645A, 1650E & 1650G
Blu
(Plate)
Blu/Yel
(Screen Gr)
Red B+
Brn/Yel
(Screen Gr)
Brn
(Plate)
Grn (4 Ohm)
White (16 Ohm)
Blu
(Plate)
Blu/Yel
(Screen Gr)
Red B+
Brn/Yel
(Screen Gr)
Brn
(Plate)
Schematic
1645A Only
Org (70 V)
Tube Audio
Yel (8 Ohm)
White (16 Ohm)
Yel (8 Ohm)
Grn (4 Ohm)
Blk (0 Ohm)
Black (0 Ohm)
PRI
SEC
PRI
SEC
Schematic - 1650E Only
Blu
(Plate)
Blu/Yel
(Screen Gr)
Red B+
Brn/Yel
(Screen Gr)
Brn
(Plate)
Blk/Red (4 Ohm)
Green (16 Ohm)
Blu
(Plate)
Red B+
Brn
(Plate)
Schematic - 1650G Only
Red/Yel (500 Ohm)
Blk/Yel (250 Ohm)
Yel (16 Ohm)
Grn (8 Ohm)
Org (3.5 Ohm)
Blk/Grn (8 Ohm)
Blk (0 Ohm)
Black (0 Ohm)
PRI
EUROPE
SEC
PRI
www.hammondmfg.com
SEC
Guelph, Ontario (519) 822-2960
St. Laurent, Quebec (514) 343-9010
Cheektowaga, NY (716) 630-7030
Basingstoke, UK 01256 812812
Queenstown, Australia 61-8-8240-2244
CANADA
USA
AUSTRALIA
93
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