Key Features:

• Designed for general purpose or replacement use, 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.

	Cat. No.	Photos	Audio Watts	Max. D.C. Bias (ma)	Wt. Lbs.
	125ASE	-	3	25	0.5
	125BSE	-	5	45	1.1
	125CSE	-	8	60	1.3
	125DSE	-	10	70	2
	125ESE	-	15	80	3
NEW!	125FSE		20	90	4.5
NEW!	125GSE		25	100	6

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Test Data (125ESE):

Cat. No.	Primary Winding Data
	Inductance (Minimum)	DC Resistance (+/- 20%)
125ESE	9.58 H	90.6 Ohms

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Mechanical Data (125ASE - 125ESE):

Cat. No. Dimensions (Inches) A B C D G Mtg. Hole 125ASE 2.81 1.35 1.69 2.38 0.187 125BSE 3.25 1.63 2.00 2.81 0.187 125CSE 3.69 1.86 2.31 3.13 0.187 125DSE 4.00 2.10 2.63 3.56 0.187 125ESE 4.50 2.36 2.94 4.00 0.187

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Mechanical Data (125FSE & 125GSE):

Cat. No. Dimensions (Inches) A B C D E G Mtg. Hole 125FSE 3.76 2.52 3.15 3.13 2.25 0.2 x 0.38 125GSE 4.15 2.88 3.46 3.45 2.5 0.2 x 0.38

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Schematic & Hook Up Data: