PACKAGE PACKAGE OPTIONS PART NUMBER

SOWTER TYPE U061

EXCEPTIONALLY HIGH BANDWIDTH
PUSH-PULL OUTPUT TRANSFORMER
for 3 pairs EL34 etc. Rl = 2200 Ohms
SIZE "P"

6.4 Kg

 Fully shrouded U061-S
Drop through U061-T
Open frame U061-O
Encapsulated U061-P+
APPLICATION A generously designed Push-Pull output transformer for use with 3 parallel pairs of EL34 valves in Triode or Ultra Linear 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 an unusually wide bandwidth. 6 dB per octave roll off at 100 kHz ensures faithful transient response and absence of ringing. Complete absence of resonance effects up to 120 kHz to ensure unconditional stability of the negative feedback can easily be achieved. Two chamber bobbin ensures full capacity and resistance balance to eliminate distortion caused by transformer unbalance. Configurable secondary windings for 4/8/16 ohms
  Primary Secondary
Nominal winding impedance 2200 ohms 4/8/16 ohms
Inductance 60 H 440 mH
DC Resistance 46 ohms 0.58 ohms
Leakage inductance referred to primary 1.62 mH
DC current per side 250 mA max
Ratio 11.73 :1
UL taps 43%
Bandwidth 5 Hz to 80 KHz (-3 dB points typical)
Total Harmonic Distortion (THD) 0.05 % at 1 kHz full power
Power rating for 0.5% THD at 22 Hz 100 Watts at 22 Hz. 
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