Hammond Audio - Tube Driver Transformer

"CLASSIC" AUDIO
TUBE DRIVER
TRANSFORMERS

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 Radiola 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)
Cat. No.	Audio Watts	Primary Impedance (Ohms)	Secondary Impedance (Ohms)	Secondary Winding	Laminations	A	B	C	D	G Mtg Hole
124A	5	10K	90K	C.T.	Grain Oriented Steel	2.37	1.10	1.36	2.00	0.187
124B	5	10K	90K	C.T.	49% Nickel	2.37	1.10	1.36	2.00	0.187
124C	5	10K	90K	C.T.	None	-	-	-	-	-
124D	5	7K c.t.	15.8K c.t.	C.T.	Grain Oriented Steel	2.80	1.30	1.68	2.38	0.187
124E	5	15K c.t.	33.8K/135K	Dual	Grain Oriented Steel	2.87	1.50	2.35	2.38	0.187

Mechanical Data:

124 Dwg.

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.