Pushpull
     
Open frame
         
Shrouded            
Potted            

 

GENERAL PURPOSE PUSH-PULL (C CLAMP)

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.
 

 

Part No. Primary Secondary
DC ma
Audio Watts
Wt. Lbs.
Price
125A 1K2-25K 1R5-15
25
3
0.19
16.70
125B 1K2-25K 1R5-15
45
5
0.30
16.70
125C 1K2-25K 1R5-15
60
8
0.50
16.70
125D 1K2-25K 1R5-15
70
10
1.00
17.25
125E 1K2-25K 1R5-15
80
15
1.50
23.91
125H 10K 02/04/08
60
8
0.55
19.41
125J 2K5/4K 3R2/4/6/8
80
8
1.00
17.25

 

Mechanical Data (125A - J):  
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
125J
3.25
1.50
1.94
2.81
0.187
125A-H Mech diagram

 

 

Schematic & Hook Up Data(125A - E):
 
125A-E Hook up
Connect Speaker
To
(Secondary Lugs)
Voice Coil Impedance (Ohms)
1.5
2
3 .2
4
6
8
12
15
Resulting Total Primary Impedance (Below),
Blue Wire to Brown Wire

1 & 2
27,000
-
-
-
-
-
-
-
2 & 3
18,000
24,000
-
-
-
-
-
-
3 & 4
16,500
22,000
-
-
-
-
-
-
4 & 5
10,000
13,500
21,600
27,000
-
-
-
-
5 & 6
8,5000
11,000
18,000
22,000
-
-
-
-
1 & 3
5,4000
7,200
11,500
15,000
21,600
-
-
-
2 & 4
4,200
5,600
9,000
11,200
16,800
22,500
-
-
3 & 5
3,300
4,400
7,000
8,800
13,200
17,600
26,400
-
4 & 6
2,400
3,200
5,100
6,400
9,600
12,800
19,200
24,000
1 & 4
2,150
2,900
4,600
5,800
8,700
11,600
17,400
21,500
2 & 5
1,550
2,050
3,300
4,100
6,150
8,200
12,300
15,500
3 & 6
1,300
1,700
2,700
3,400
5,100
6,800
10,200
12,800
1 & 5
-
1,400
2,200
2,800
4,200
5,600
8,400
10,200
2 & 6
-
-
1,700
2,100
3,150
4,200
6,300
8,000
1 & 6
-
-
1,200
1,500
2,300
3,000
4,500
5,600

 

 

Schematic & Hook Up Data (125H):
 
125H Hook up

 

 

Schematic & Hook Up Data (125J):
 
125J Hookup
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

 

 

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CLASSIC PUSH-PULL (SHROUDED)

Push pull shrouded output  transformer

  Finish: Fully shrouded, black powder coat finish.  
  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.
 

 

Part No. Primary Secondary
Audio Watts
Wt.Lbs.

Dim. Ref.

Price
1608A 8Kct 04/08/16
10
2.5
55.03
1609A 10Kct 04/08/16
10
2.5
52.48
1615A 5Kct 04/08/16
15
3.25
59.37
1650E 8Kct 04/08/16
15
3.5
60.40
1620A 6K6ct 04/08/16
20
3.5
65.25
1650FA 7K6ct 04/08/16
25
4
67.45
1645A 5Kct 4/8/16/70V
30
4.5
68.69
1650G 6K6ct 3R5/8/16/250/500
35
5
53.91
1650HA 6K6ct 04/08/16
40
6.5
75.30
1650KA 3K4ct 04/08/16
50
7
75.73
1650NA 4K3ct 04/08/16
60
8
82.21
1650PA 6K6ct 04/08/16
60
8
78.23
1650RA 5Kct 04/08/16
100
12
93.78
1650TA 1K9ct 04/08/16
120
14
98.17
1650WA 1K9ct 04/08/16
280
28
229.56

 

 

 

Schematic & Hook Up Data (except 1645A, 1650E & 1650G):
Schematic & Hook Up Data (1645A only):
   
   
Schematic & Hook Up Data (1650E only):
Schematic & Hook Up Data (1650G only):

 

 

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PUSH-PULL (POTTED)

  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.
 

 

Part No. Primary Secondary
Audio Watts
Wt. Lbs.
Price
1650KP 3K4ct 04/08/16
50
9
147.50
1650PP 6K6ct 04/08/16
60
10
157.30
1650RP 5Kct 04/08/16
100
13
218.50

Mechanical Data:  
   
Pot Mech diagram 1
Pot Meck diagram 2
 
   
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

 

Schematic & Hook Up Data:
Pot Hook up

 

Secondary Connections:
Sec 1  Potted
Sec 2 Potted
Sec 3 Potted

 

 

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