PACKAGE PACKAGE OPTIONS PART NUMBER

SOWTER TYPE U072


PUSH-PULL OUTPUT TRANSFORMER
for KT88,6650 FIVE PAIRS FIXED BIAS 
 Rl = 1000 Ohms

SIZE "Q"

8.8 Kg

Fully shrouded U072-S
Drop through U072-T
Open frame U072-O
APPLICATION A generously designed Push-Pull output transformer for use with five parallel pairs of KT88 or similar valves in fixed bias mode with or without overall negative feedback.
FEATURES 3 inch Grain Oriented (M6) laminated core for minimal losses and distortion. 14 section interleaved primary and secondary windings to give excellent bandwidth.  Two chamber bobbin ensures full capacity and resistance balance to eliminate distortion caused by transformer unbalance.  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 can be selected at time of order.
POWER RATING 400 Watts at 40 Hz. 
  Primary Secondary
Nominal winding impedance 1000 ohms 16/8/4 ohms
Inductance 22 H 0.35 H
DC Resistance 15 ohms 0.35 ohms
Leakage inductance 0.32 mH ref primary
DC current per side 300 mA max
Ratio (16 ohm configuration) 7.9 :1
UL taps 40%
Bandwidth 5 Hz to 100 KHz (-3 dB points typical)
Total Harmonic Distortion 0.05 % at 1 kHz full power
CONNECTIONS
E A Sowter Ltd
The Boatyard, Cullingham Road
IPSWICH IP1 2EG England
Tel: +44(0)1473 252794
Fax: +44(0)1473 236188
E-Mail sales@sowter.co.uk