SOWTER Type U079

COST/PERFORMANCE PUSH-PULL OUTPUT TRANSFORMER 
FOR 300B

PACKAGE DIMENSIONS STYLE /SIZE REF
Fully Shrouded SM
Drop Through TM
Open Frame OM
APPLICATION A low priced high performance output transformer for push-pull 300B or similar valves.
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.  Other secondary configurations available at time of order. Various package options.
  Impedance  DC Resistance Inductance 
PRIMARY  5000 ohms 123 ohms 87 H
SECONDARY   16/8/4 ohms 0.4 ohms
(8 ohm config)
0.139 H
(8 ohm config)
LEAKAGE INDUCTANCE referred to primary 3.0 mH
VOLTAGE RATIO (8 ohm config) 25:1
POWER (For 0.5 % Distortion at 20 Hz) 30 W
DISTORTION (30 Watts at 1000Hz) 0.05 %
DC QUIESCENT CURRENT 150 mA max.
FREQUENCY RESPONSE (Typical) 
5 ohm source (+/- 1.5 dB)
5 Hz to 70 kHz
SHIPPING WEIGHT (SIZE CODE M) 3.6 kg
E A Sowter Ltd
The Boatyard Cullingham Road
IPSWICH IP1 2EG England
Tel: +44(0)1473 252794
Fax: +44(0)1473 236188