Pushpull

Part No. Primary Secondary DC ma
Audio Watts
Wt. Lbs.
Price
125A 1K2-25K 1R5-15
25
3
0.19
12.90
125B 1K2-25K 1R5-15
45
5
0.30
12.90
125C 1K2-25K 1R5-15
60
8
0.50
12.90
125D 1K2-25K 1R5-15
70
10
1.00
13.30
125E 1K2-25K 1R5-15
80
15
1.50
18.40
125H 10K 02/04/08
60
8
0.55
15.00
125J 2K5/4K 3R2/4/6/8
80
8
1.00
13.30
GENERAL PURPOSE PUSH-PULL (C CLAMP)
Part No. Primary Secondary
Audio Watts
Wt.Lbs.
 Price
1608 8Kct 04/08/16
10
2.5
36.00
1609 10Kct 04/08/16
10
2.5
35.50
1615 5Kct 04/08/16
15
3.25
37.50
1650E 8Kct 04/08/16
15
3.5
46.50
1620 6K6ct 04/08/16
20
3.5
46.50
1650F 7K6ct 04/08/16
25
4
46.50
1645 5Kct 4/8/16/70V
30
4.5
50.00
1650G 6K6ct 3R5/8/16/250/500
35
5
41.50
1650H 6K6ct 04/08/16
40
6.5
50.00
1650K 3K4ct 04/08/16
50
7
58.30
1650N 4K3ct 04/08/16
60
8
58.30
1650P 6K6ct 04/08/16
60
8
58.30
1650R 5Kct 04/08/16
100
12
58.30
1650T 1K9ct 04/08/16
120
14
58.30
1650W 1K9ct 04/08/16
280
28
136.00
CLASSIC PUSH-PULL (SHROUDED)
Part No. Primary Secondary
Audio Watts
Wt. Lbs.
Price
1650KP 3K4ct 04/08/16
50
9
125.00
1650PP 6K6ct 04/08/16
60
10
133.00
1650RP 5Kct 04/08/16
100
13
200.00
PUSH-PULL (POTTED)
Push pull shrouded output transformer
Potted push pull output transformer
back to top
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, pentode and tetrode connected audio output. The 1650G does NOT have primary screen taps and will not support "Ultra-Linear" applications.
Designed for push-pull tube output circuits.
Enclosed in a drawn steel case, the transformer is completely potted in epoxy.
Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. ref. 1 Khz) minimum.
Lead connection is via 10 bottom mounted lugs.
All units include 40% screen taps for Ultra-Linear operation (if desired).
Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output.
Single ended/push pull output transformer
Designed for general purpose or replacement use in push-pull tube output circuits.
Frequency response: 150 Hz. - 15 Khz (+/- 1db max. ref. 1 Khz)
Open style with minimum 5" long primary leads, secondary solder lugs for convenient secondary connections.
Tables provided with each transformer listing 90 pre-calculated impedance ratios.
Primary impedances from 1,200 to 25,000 Ohms.
Secondary impedances from 1.5 to 15 Ohms.
125A-H Mech diagram
Mechanical Data (125A - H):
Part No
Dimensions (Inches)
G Mtg. Hole
A
B
C
D
125A
2.06
1.25
1.19
1.75
0.187
125B
2.38
1.38
1.38
2.00
0.187
125C
2.81
1.50
1.69
2.38
0.187
125D
3.25
1.75
2.00
2.81
0.187
125E
3.69
2.00
2.31
3.13
0.187
125H
2.81
1.40
1.70
2.36
0.187
Mechanical Data (125J):
125J Mech diagram
Schematic & Hook Up Data(125A - E):
Schematic & Hook Up Data (125H):
125A-E Hook up
PRIMARY
IMPEDANCE
Plate to Plate
Brown to Blue
(Ohms)
SECONDARY
IMPEDANCE
(Ohms)
SECONDARY
LEAD
CONNECTIONS
4,000
6 / 8
WHT - GRN
4,000
3.2 / 4
WHT -YEL
2,500
6 / 8
BLK - GRN
2,500
3.2 / 4
BLK - YEL
125H Hook up
Mechanical Data:
Schematic & Hook Up Data (125J):
125J Hookup
Schematic & Hook Up Data (except 1650E, 1645 & 1650G):
1608 Hook up
Part No.
Dimensions (Inches)
G. Slot
A
B
C
D
E
+/- 1/16"
1608
2.5
2.75
3.06
2
1.69
.203 x .38
1609
2.5
2.75
3.06
2
1.69
.203 x .38
1615
2.5
3.25
3.06
2
2.19
.203 x .38
1650E
2.5
3.25
3.06
2
2.50
.203 x .38
1620
2.5
3.50
3.06
2
2.44
.203 x .38
1650F
2.5
3.50
3.06
2
2.44
.203 x .38
1645
2.5
3.75
3.06
2
2.69
.203 x .38
1650G
3.13
3.75
3.81
2.5
2.50
.203 x .38
1650H
3.13
4.00
3.81
2.5
2.69
.203 x .38
1650K
3.13
4.00
3.81
2.5
2.69
.203 x .38
1650N
3.13
4.25
3.81
2.5
2.94
.203 x .38
1650P
3.13
4.25
3.81
2.5
2.94
.203 x .38
1650R
3.75
4.25
4.56
3
3.06
.203 x .38
1650T
3.75
4.50
4.56
3
3.31
.203 x .38
1650W
4.38
7.50
5.25
3.5
5.88
.203 x .38
1627 Mech diagram
Sec 1
NOTE:
Primary & secondary connections above, do NOT include the 1650G.
The primary of (only) the 1650G does not include screen taps (see below).
The 1650G has a single secondary winding, tapped at each impedance point.

Secondary Connections
Sec 3
Sec 2
Schematic & Hook Up Data (1650G only):
Pot Mech diagram 1
Mechanical Data:
Part No.
Dimensions (Inches)
A
B
C
D
E
F
G
1650KP
3.31
3.88
4.25
2.50
3.00
3.31
2.56
1650PP
3.31
3.88
4.25
2.50
3.00
3.31
2.56
1650RP
4.25
5.00
4.50
3.38
4.25
4.50
3.75
1650G Hook up
To hook up secondary loads simply use Com (Common wire - Blk) and the corresponding wire for the secondary load required (ie...for an 8 Ohm load use the Blk and Grn wire).


Sec 2 Potted
Pot Meck diagram 2
Sec 1 Potted
Schematic & Hook Up Data:
Secondary Connections
Pot Hook up
Sec 3 Potted
To hook up 4/8/16 ohm secondary loads - see "Secondary Connections" data above.
To hook up secondary to 70V loads, jumper Blk/Yel wire to Grn wire. Connect load to Blk and White wires.
Schematic & Hook Up Data (1645 only):
Finish: Fully shrouded, black powder coat finish.
1650E Hook up
To hook up secondary loads simply use Com (Common wire - Blk) and the corresponding wire for the secondary load required (ie...for an 8 Ohm load use the Blk and Blk/Grn wire)
Schematic & Hook Up Data (1650E only):
[Power] [Choke] [Single.ended] [Push.pull] [Line/mic/interstage] [Filament/heater]
1645 Hook up