Key Features:

• Designed for general purpose or replacement use in single ended or phase inverter tube driver circuits.
• Open style with minimum 5" long primary leads.
• Minimum frequency response 150 Hz. - 15 Khz (+/- 1db max. ref. 1 Khz.) at full rated power.
• Our part number 124B is the same as our 124A except for 49% Nickel laminations for greater fidelity.
• Our part number 124C (below) is the COIL ONLY (for those experimenters who want to use their own "iron").
• If you are looking to replace Radio III-A audio transformers, check out our
  universal replacement unit.

Cat. No.	Audio Watts	Primary Impedance (Ohms)	Secondary Impedance (Ohms)	Secondary Winding	Laminations	Dimensions (Inches)
						A	B	C	D	Price:
124A	5	10K	90K	C.T.	Grain Oriented Steel	2.38	1.35	1.43	2.00	$37.48
124B	5	10K	90K	C.T.	49% Nickel	2.38	1.35	1.43	2.00	$66.14
124C	5	10K	90K	C.T.	None	-	-	-	-	$28.65
124D	5	7K c.t.	15.8K c.t.	C.T.	Grain Oriented Steel	2.81	1.46	1.68	2.38	$52.88
124E	5	15K c.t.	33.8K/135K	Dual	Grain Oriented Steel	2.88	1.74	2.37	2.38	$63.93
124F	5	15K c.t.	3.75K/15K	Dual	Grain Oriented Steel	2.88	1.75	2.37	2.38	$66.66

NOTE:
Our 5C-00 catalog contains a misprint:
Audio Watts of 5 mw. is incorrectly listed, should be 5 watts (as above)

Mechanical Data:

Schematic & Hookup Data: (124E Only)

- For Parallel connected operation (33.8K Ohm Secondary): Connect the GRN/YEL wire to the GRN wire AND the BLK/YEL wire to the BLK wire.

- For Series connected operation (135K Ohm Secondary): Connect the BLK/YEL wire to the GRN (this becomes the center tap) - GRN/YEL and BLK wires are the output.

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126 Series

Key Features (126 Series):

• Designed for driver use ONLY in single ended tube output amplifiers. These units replace coupling
  capacitor circuits for improved sound.
• Closed style with minimum 8" long leads.
• All models use bifilar wound windings for exceptional coupling and bandwidth.
• Minimum frequency response 20 Hz. - 20 Khz (+/- 1db max. ref. 1 Khz.).
• The core is gapped to support the specified D.C. bias current.
• Core uses Hi grade silicon laminations (29M6).
• Units weight - 3 lbs. 2 oz.

Part No.	Audio Watts	Primary		Secondary		Inductance	Rated D.C. Bias Current	Dimensions (Inches)
		Impedance (Ohms)	D.C. Resistance (Ohms)	Impedance (Ohms)	D.C. Resistance (Ohms)			A	B	C	D	E	G - Mtg. Slot
126A $114.61	4	5K	178	5K	178	59 Henrys	15 ma.	2.50	3.12	3.12	2.0	2.25	.203 x .38
126B $114.61	4	5K	178	5K	178	44 Henries	30 ma.	2.50	3.12	3.12	2.0	2.25	.203 x .38
126C $114.61	4	10K	375	10K	375	106 Henrys	15 ma.	2.50	3.12	3.12	2.0	2.25	.203 x .38

 

Mechanical Data (126 Series):

Schematic & Hookup Data (126 Series):

 

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03-12-2024