The Audio Type Transformers 125SE series. "Classic"  Universal single ended tube Output audio transformers.

 

125ESE Photo

 

Key Features:

  • Designed for general purpose or replacement use (not Hi-Fi), in single ended, tube output circuits.

  • Frequency response: 100 Hz. - 15 Khz (+/- 1db max. - ref. 1 Khz).

  • For full frequency response (20 Hz. to 20 Khz.) - see our 1627-1642 series.

  • For push-pull output use, see our 125 series - optimized for push-pull tube output circuits.

  • Open style with minimum 12" long primary & secondary leads leads.

  • All sizes use butt stacked cores (using 29M6 steel) with an air gap, to reduce D.C. core saturation.

  • Primary impedance range from 2,500 to 10,000 Ohms.

  • Secondary impedance range from 4 to 32 Ohms.

P#

Audio Watts

Max. D.C. Bias
(ma)

Wt. Lbs.

EID-125ASE

3

25

0.5

EID-125BSE

5

45

1.1

EID-125CSE

8

60

1.3

EID-125DSE

10

70

2

EID-125ESE

15

80

3

EID-125FSE

20

90

4.5

EID-125GSE

25

100

6.5

 

Test Data:

P#

Primary Winding Data

Inductance
(Minimum)

DC Resistance
(+/- 20%)

EID-125ESE

9.58 H

90.6 Ohms

 

Mechanical Data:

 

EID-125ASE to EID-125ESE

 

125SE Dwg

 

P#

Dimensions (Inches)

A

B

C

D

G
Mtg. Hole

EID-125ASE

2.81

1.35

1.69

2.38

0.187

EID-125BSE

3.25

1.63

2.00

2.81

0.187

EID-125CSE

3.69

1.86

2.31

3.13

0.187

EID-125DSE

4.00

2.10

2.63

3.56

0.187

EID-125ESE

4.50

2.36

2.94

4.00

0.187

EID-125FSE to EID-125GSE

 

Cat. No.

Dimensions (Inches)

A

B

C

D

E

G
Mtg. Hole

EID-125FSE

3.76

2.52

3.15

3.13

2.25

0.2 x 0.38

EID-125GSE

4.15

2.88

3.46

3.45

2.5

0.2 x 0.38

 

Schematic & Hook Up Data:

125SE Schematic

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