90
EUROPE
Basingstoke, UK 01256 812812
AUSTRALIA
Queenstown, Australia 61-8-8240-2244
CANADA
Guelph, Ontario (519) 822-2960
St. Laurent, Quebec (514) 343-9010
USA
Cheektowaga, NY (716) 630-7030
©
www.hammondmfg.com
PUSH - PULL
"CLASSIC" TUBE TYPE - ULTRA-LINEAR
OUTPUT TRANSFORMERS
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exibleleads8"min.•
Due to the unique interleaving of the windings BOTH secondary windings must be engaged to meet •
specications(seehook-upschematics).
Negative feedback circuits can be utilized by connecting to the Green & Black wires - 4 Ohm secondary (this •
windingisalwaysengagedonallloadcongurations).
All units include 40% screen taps for Ultra-Linear operation (if desired). •
Typical applications - Push-Pull: triode, Ultra-Linear pentode, and tetrode connected audio output.•
For our NEW improved "easy hook-up" secondary series - see our 1608-1650 "A" series.•
For the "ultimate" in Push-Pull output see our line of epoxy potted output transformers (1650 potted series).•
Push - Pull Audiophile - Output (1608-1650 Series)
Part
Number
Audio
Watts
(RMS)
Primary
Impedance
Max. DC
Per Side
Secondary
Impedance
Dimensions (Inches) Wt.
Lbs.
A B C D E
+/- 1/16”
G
Slot
1608 10 8,000 C.T. 100 ma. 4-8-16 2.50 2.75 3.06 2.00 1.69 .203 x .38 2.5
1609 10 10,000 C.T. 100 ma. 4-8-16 2.50 2.75 3.06 2.00 1.69 .203 x .38 2.5
1615 15 5,000 C.T. 100 ma. 4-8-16 2.50 3.25 3.06 2.00 2.19 .203 x .38 3.25
1620 20 6,600 C.T. 158 ma. 4-8-16 2.50 3.50 3.06 2.00 2.44 .203 x .38 3.5
1650F 25 7,600 C.T. 128 ma. 4-8-16 2.50 3.50 3.06 2.00 2.44 .203 x .38 4
1645 30 5,000 C.T. 128 ma. 4-8-16-70 V 2.50 3.75 3.06 2.00 2.69 .203 x .38 4.5
1650H 40 6,600 C.T. 200 ma. 4-8-16 3.13 4.00 3.81 2.50 2.69 .203 x .38 6.5
1650K 50 3,400 C.T. 318 ma. 4-8-16 3.13 4.00 3.81 2.50 2.69 .203 x .38 7
1650N 60 4,300 C.T. 318 ma. 4-8-16 3.13 4.25 3.81 2.50 2.94 .203 x .38 8
1650P 60 6,600 C.T. 200 ma. 4-8-16 3.13 4.25 3.81 2.50 2.94 .203 x .38 8
1650R 100 5,000 C.T. 318 ma. 4-8-16 3.75 4.25 4.56 3.00 3.06 .203 x .38 12
1650T 120 1,900 C.T. 403 ma. 4-8-16 3.75 4.50 4.56 3.00 3.31 .203 x .38 14
1650W 280 1,900 C.T. 806 ma. 4-8-16 4.38 7.50 5.25 3.50 5.88 .203 x .38 28
Tube Audio
91
EUROPE
Basingstoke, UK 01256 812812
AUSTRALIA
Queenstown, Australia 61-8-8240-2244
CANADA
Guelph, Ontario (519) 822-2960
St. Laurent, Quebec (514) 343-9010
USA
Cheektowaga, NY (716) 630-7030 ©
www.hammondmfg.com
Suggested Tube Types
Push - Pull Audiophile - Output (1608-1650 Series)
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rst,beforemakingadecisiononaproperoutputtransformer.
Yel
Grn/Yel
Blk/Yel
Grn
Blk
4 Ohm
Yel
Grn/Yel
Blk/Yel
Grn
Blk
8 Ohm
Yel
Grn/Yel
Blk/Yel
Grn
Blk
16 Ohm
Part
Number
Audio Watts
(RMS)
Primary
Impedance Operation Tube Types
1608 10 8,000 C.T. Push-Pull (2 Tubes) 6AQ5, 6V6, 6BQ5, EL84, SV83
1609 10 10,000 C.T. Push-Pull (2 Tubes) 6AQ5, 6V6, 6BQ5, EL84, SV83
1615 15 5,000 C.T. Push-Pull (2 Tubes) 2A3, 6A3, 6AQ5, 6B4G, 6L6, 6V6
1620 20 6,600 C.T. Push-Pull (2 Tubes) 6AQ5, 6L6, 6V6
1650F 25 7,600 C.T. Push-Pull (2 Tubes) 6L6GC, 6V6, 807, 5881, EL34
1645 30 5,000 C.T. Push-Pull (2 Tubes) 6L6GC, 6V6, 807, 5881, EL34
1650H 40 6,600 C.T. Push-Pull (2 Tubes) 6L6GC, 807, 5881, EL34
1650K 50 3,400 C.T. Push-Pull Par. (4 Tubes) 6L6GC, 807, 5881, EL34, 6146B, 6550B
1650N 60 4,300 C.T. Push-Pull Par. (2 or 4 Tubes) 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88
1650P 60 6,600 C.T. Push-Pull (2 Tubes) 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88
1650R 100 5,000 C.T. Push-Pull Par. (2 or 4 Tubes) 807, 5881, EL34, 6146B, 6550B, KT88
1650T 120 1,900 C.T. Push-Pull Par. (4 or 6 Tubes) 6L6GC, 5881, EL34, 6550B, KT88
1650W 280 1,900 C.T. Push-Pull Par. (6 or 8 Tubes) 6L6GC, 5881, EL34, 6550B, KT88
Note: To hook up 4/8/16 ohm secondary loads, see "Sec-
ondary Hook-Up Data" below. To hook up secondary to
70V loads, jumper Blk/Yel wire to Grn wire. Connect load
to Blk and White wires.
Brn
(Plate)
Blu/Yel
(Screen Gr)
Brn/Yel
(Screen Gr)
Blu
(Plate)
Blk (0 Ohm)
Grn (4 Ohm)
Blk/Yel (0 Ohm)
Yel (8 Ohm)
PRI SEC
Red B+
Grn/Yel (4 Ohm)
Secondary Hook-Up Data
NOTE:DuetotheuniqueinterleavingofthewindingsBOTHsecondarywindingsmustbeengaged(asshown)tomeetspecications
Brn
(Plate)
Blu/Yel
(Screen Gr)
Brn/Yel
(Screen Gr)
Blu
(Plate)
Blk (0 Ohm)
Grn (4 Ohm)
Blk/Yel (0 Ohm)
White (70 V)
PRI SEC
Red B+
Grn/Yel (4 Ohm)
Yel (8 Ohm)
Schematic - All Parts Except 1645 Schematic - 1645 Only
Tube Audio
92
EUROPE
Basingstoke, UK 01256 812812
AUSTRALIA
Queenstown, Australia 61-8-8240-2244
CANADA
Guelph, Ontario (519) 822-2960
St. Laurent, Quebec (514) 343-9010
USA
Cheektowaga, NY (716) 630-7030
©
www.hammondmfg.com
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exible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
Audio
Watts
(RMS)
Primary
Impedance
Max. DC
Per Side
Secondary
Impedance
Dimensions (Inches) Wt.
Lbs.
A B C D E
+/- 1/16”
G
Slot
1608A 10 8,000 C.T. 100 ma. 4-8-16 2.50 2.75 3.06 2.00 1.69 .203 x .38 2.5
1609A 10 10,000 C.T. 100 ma. 4-8-16 2.50 2.75 3.06 2.00 1.69 .203 x .38 2.5
1615A 15 5,000 C.T. 100 ma. 4-8-16 2.50 3.25 3.06 2.00 2.19 .203 x .38 3.25
1650E 15 8,000 C.T. 100 ma. 4-8-16 2.50 3.25 3.06 2.00 2.50 .203 x .38 3.5
1620A 20 6,600 C.T. 158 ma. 4-8-16 2.50 3.50 3.06 2.00 2.44 .203 x .38 3.5
1650FA 25 7,600 C.T. 128 ma. 4-8-16 2.50 3.50 3.06 2.00 2.44 .203 x .38 4
1645A 30 5,000 C.T. 128 ma. 4-8-16-70 V 2.50 3.75 3.06 2.00 2.69 .203 x .38 4.5
1650G 35 6,600 C.T. 200 ma. 3.5/8/16/250/500 3.13 3.75 3.81 2.50 2.25 .203 x .38 5
1650HA 40 6,600 C.T. 200 ma. 4-8-16 3.13 4.00 3.81 2.50 2.69 .203 x .38 6.5
1650KA 50 3,400 C.T. 318 ma. 4-8-16 3.13 4.00 3.81 2.50 2.69 .203 x .38 7
1650NA 60 4,300 C.T. 318 ma. 4-8-16 3.13 4.25 3.81 2.50 2.94 .203 x .38 8
1650PA 60 6,600 C.T. 200 ma. 4-8-16 3.13 4.25 3.81 2.50 2.94 .203 x .38 8
1650RA 100 5,000 C.T. 318 ma. 4-8-16 3.75 4.25 4.56 3.00 3.06 .203 x .38 12
1650TA 120 1,900 C.T. 403 ma. 4-8-16 3.75 4.50 4.56 3.00 3.31 .203 x .38 14
1650WA 280 1,900 C.T. 806 ma. 4-8-16 4.38 7.50 5.25 3.50 5.88 .203 x .38 28
Tube Audio
93
EUROPE
Basingstoke, UK 01256 812812
AUSTRALIA
Queenstown, Australia 61-8-8240-2244
CANADA
Guelph, Ontario (519) 822-2960
St. Laurent, Quebec (514) 343-9010
USA
Cheektowaga, NY (716) 630-7030 ©
www.hammondmfg.com
Push - Pull Audiophile - Output (1608-1650 "A" Series)
Schematic - 1650G Only
Suggested Tube Types
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rst,beforemakingadecisiononaproperoutputtransformer.
Schematic
All Parts Except 1645A, 1650E & 1650G
Part
Number
Audio Watts
(RMS)
Primary
Impedance Operation Tube Types
1608A 10 8,000 C.T. Push-Pull (2 Tubes) 6AQ5, 6V6, 6BQ5, EL84, SV83
1609A 10 10,000 C.T. Push-Pull (2 Tubes) 6AQ5, 6V6, 6BQ5, EL84, SV83
1615A 15 5,000 C.T. Push-Pull (2 Tubes) 2A3, 6A3, 6AQ5, 6B4G, 6L6, 6V6
1650E 15 8,000 C.T. Push-Pull (2 Tubes) 6AQ5, 6V6, 6BQ5, EL84, SV83
1620A 20 6,600 C.T. Push-Pull (2 Tubes) 6AQ5, 6L6, 6V6
1650FA 25 7,600 C.T. Push-Pull (2 Tubes) 6L6GC, 6V6, 807, 5881, EL34
1645A 30 5,000 C.T. Push-Pull (2 Tubes) 6L6GC, 6V6, 807, 5881, EL34
1650G 35 6,600 C.T. Push-Pull (2 Tubes) 6L6GC, 807, 5881, EL34
1650HA 40 6,600 C.T. Push-Pull (2 Tubes) 6L6GC, 807, 5881, EL34
1650KA 50 3,400 C.T. Push-Pull Par. (4 Tubes) 6L6GC, 807, 5881, EL34, 6146B, 6550B
1650NA 60 4,300 C.T. Push-Pull Par. (2 or 4 Tubes) 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88
1650PA 60 6,600 C.T. Push-Pull (2 Tubes) 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88
1650RA 100 5,000 C.T. Push-Pull Par. (2 or 4 Tubes) 807, 5881, EL34, 6146B, 6550B, KT88
1650TA 120 1,900 C.T. Push-Pull Par. (4 or 6 Tubes) 6L6GC, 5881, EL34, 6550B, KT88
1650WA 280 1,900 C.T. Push-Pull Par. (6 or 8 Tubes) 6L6GC, 5881, EL34, 6550B, KT88
Brn
(Plate)
Blu/Yel
(Screen Gr)
Brn/Yel
(Screen Gr)
Blu
(Plate)
Blk (0 Ohm)
Grn (4 Ohm)
Yel (8 Ohm)
White (16 Ohm)
PRI SEC
Red B+
Schematic - 1650E Only
Brn
(Plate)
Blu/Yel
(Screen Gr)
Brn/Yel
(Screen Gr)
Blu
(Plate)
Black (0 Ohm)
Grn (4 Ohm)
White (16 Ohm)
Org (70 V)
PRI SEC
Red B+ Yel (8 Ohm)
Schematic
1645A Only
Brn
(Plate)
Blu/Yel
(Screen Gr)
Brn/Yel
(Screen Gr)
Blu
(Plate)
Blk (0 Ohm)
Blk/Red (4 Ohm)
Blk/Grn (8 Ohm)
Green (16 Ohm)
PRI SEC
Red B+
Brn
(Plate)
Blu
(Plate)
Black (0 Ohm)
Org (3.5 Ohm)
Yel (16 Ohm)
Red/Yel (500 Ohm)
PRI SEC
Red B+
Blk/Yel (250 Ohm)
Grn (8 Ohm)
Tube Audio
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Hammond:
1608 1620 1645 1609 1615 1650F 1650P 1650T 1650N 1650R 1650H 1650K 1650W 1650G