SOWTER Type 8950

PUSH-PULL OUTPUT TRANSFORMER FOR WILLIAMSON AMPLIFIER

 

PACKAGE OPTIONS STYLE CODE
Fully Shrouded S
Encapsulated P+
Drop Through T
APPLICATION our interpretation of the original Williamson design using more modern materials.  This means a higher grade of core material, better copper and inter-winding insulation. Lower distortion and longer life.
FEATURES Highest grade low loss (M6) grain oriented silicon iron core for minimal distortion. 14 interleaved winding sections to maximize bandwidth and ensure clean transient response. Two chamber bobbin to ensure full geometric balance. Low copper resistance to minimize losses and maximize loudspeaker damping. 4 separate secondary windings (See below) for optimum matching to load without the use of tapped windings which can reduce HF response.
  Impedance  DC Resistance Inductance 
PRIMARY  10000 ohms 132 ohms 117 H
SECONDARY   16/8/4 ohms 0.3/0.22/0.15 ohms 118 mH (16 ohm config)
Leakage inductance referred to primary 2.7 mH
POWER (For 0.5 % Distortion at 20 Hz) 30 W
DISTORTION (30 Watts at 1000Hz) 0.05 %
DC QUIESCENT CURRENT 100-150 mA
FREQUENCY RESPONSE 5K0 ohm source (+/- 1.5 dB) 5 Hz to 70 kHz

E A Sowter Ltd
The Boatyard Cullingham Road
IPSWICH IP1 2EG England
Tel: +44(0)1473 252794
Fax: +44(0)1473 236188