A-107 Interstage Driver Transformer

The Hashimoto A-107 is a very versatile interstage driver transformer with the possibility of using both the primary and the secondary for series or parallel connection.  The primary impedance of the A-107 (with the primary series connection) is 7K Ohms that is suitable for a triode driver stage with the maximum of 10 mA primary current (20 mA with the primary parallel connection).  The secondary of the A107 can be used for series, parallel, or Push-Pull connection with 1:2, 1:1, or 1:1+1 primary to secondary ratio, respectably.  When the secondary is connected as the Push-Pull arrangement, the A-107 can be used as a phase splitter.  Because of its wide frequency response range (25 to 25,000 Hz +-2dB - please click the right thumbnail to see the actual chart), the A-107 virtually eliminates the weakness of interstage driver transformers with the incredible mid range sound that you can not simply experience through CR couplings.              

The A-107 measures 52 (W) x 58 (D) x 85 (H) mm, and weighs 0.8Kg (1.8 LB).  The Primary Inductance is 70H (under the primary series connection, Ib=5mA, 5V, 50Hz).

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Last changed: 02/01/15