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Universal Push-Pull Tube Output

125E Photo 

 

Key Features

  • Designed for general purpose or replacement use in push-pull tube output circuits.
  • Frequency response: 150 Hz. - 15 Khz at full rated power (+/- 1db max. ref. 1 Khz)
  • Open style with minimum 5" long primary leads.
  • Secondary solder lugs for convenient secondary connections (except 125B - uses minimum 5" secondary leads).
  • Tables provided with each transformer listing 90 pre-calculated impedance ratios (see below).
  • Primary impedances from 1,200 to 25,000 Ohms.
  • Secondary impedances from 1.5 to 15 Ohms.

 

Part Number

(click for price

or to order)

Thumbnail
Photo

Audio
Watts

Max. D.C. Bias
(ma)

Primary
Inductance
Data Sheet

Reader File

Weight
(lbs.)

125A
Click Here To Enlarge
3 25 14.94 H PDF Download 0.19
125B
Click Here To Enlarge
5 45 8.97 H PDF Download

0.3
125C
Click Here To Enlarge
8 60 5.60 H PDF Download 0.5
125D
Click Here To Enlarge
10 70 4.48 H - 1
125E
Click Here To Enlarge
15 80 2.99 H - 1.5
 

 90 Pre-Calculated Impedance Ratios 125 Schematic

 

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
8,500
11,000
18,000
22,000
-
-
-
-
1 & 3
5,400
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 

 

MECHANICAL DATA 

 

125 Line Art

 

Part Number

Dimensions
(Inches)

A

B

C

D

G Mtg. Hole

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

 

 

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