124A Hammond

1 / 8 / 2 2 , 4 : 1 3 P M T u b e D r i v e r - I n t e r s t a g e ( 1 2 4 S e r i e s ) - H a m m o n d M f g . Quality Products. Service Excellence. Tube Driver - Interstage 124 Series Features Designed for general purpose or replacement use in push-pull or phase inverter tube driver circuits. Should not be used for single ended applications. They have no gap for DC bias current present in SE mode. Open style with minimum 5 long primary leads. Minimum frequency response 150 Hz. - 15 kHz (+1 /- 3db) 1 kHz. 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 owniro). If you are looking to replace Radiola III-A audio transformers, check out our universal radiola replacement unit. Hookup Data 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. Primary Secondary D.C. D.C. Dimensions Audio Impedance Resistance Impedance Resistance G Part No. Watts (Ohms) (Ohms) (Ohms) (Ohms) Winding Laminations A B C D Mtg Hole 124A 5 10K 403 90K C.T. 1524 C.T. Grain Oriented Steel 2.38 1.35 1.43 2.00 0.19 124B 5 10K 403 90K C.T. 1500 C.T. 49% Nickel 2.38 1.35 1.43 2.00 0.19 124C 5 10K 403 90K C.T. 1524 C.T. None-Coil Only - - - - - h t t p s : / / w w w . h a m m f g . c o m / e l e c t r o n i c s / t r a n s f o r m e r s / a u d i o / 1 2 4 1 / 21 / 8 / 2 2 , 4 : 1 3 P M T u b e D r i v e r - I n t e r s t a g e ( 1 2 4 S e r i e s ) - H a m m o n d M f g . Primary Secondary D.C. D.C. Dimensions Audio Impedance Resistance Impedance Resistance G Part No. Watts (Ohms) (Ohms) (Ohms) (Ohms) Winding Laminations A B C D Mtg Hole 124D 5 7K C.T. 454 15.8K C.T. 681 C.T. Grain Oriented Steel 2.81 1.46 1.68 2.38 0.19 124E 5 15K C.T. 728 33.8K/135K 3880 Dual Grain Oriented Steel 2.88 1.74 2.37 2.38 0.19 124F 5 15K C.T. 900 3.75K / 15K 899.6 Dual Grain Oriented Steel 2.88 1.75 2.37 2.38 0.19 Data subject to change without notice 2022. Hammond Manufacturing Ltd. All rights reserved. h t t p s : / / w w w . h a m m f g . c o m / e l e c t r o n i c s / t r a n s f o r m e r s / a u d i o / 1 2 4 2 / 2