SOWTER AUDIO TRANSFORMERS
LOW DCR MUMETAL LINE OUTPUT TRANSFORMER

Sowter Type 8940 - BUY

5k to 600 ohm Line Output Transformer for Altec 1566a, Drip OPTO 4 ac coupled cathode follower etc

Size k open frand U-Clamp style

APPLICATION

For use in a high performance valve compressor/amplifier etc. Designed for use with a cathode follower or other low impedance source ideally 600 Ohms or less driving a nominal 600 ohm line. A good quality capacitor must be used to isolate the transformer from the dc voltage of the driving stage..  No dc is permitted in the primary winding.

For use with Drip Opto 4. Link to SCHEMATIC

FEATURES

Combination core using High grade Grain Oriented Silicon Iron (M6) and Mumetal (76% Nickel). This provides minimal harmonic distortion, a high level capability, exceptional bandwidth and transient response which is maintained over a dynamic range of 100 dB or more. Internal electrostatic shields to maximise output balance and noise immunityMimimal low frequency phase shift. Low dc resistance ensures the possibility of a pre amp with a very low output impedance.
RATIO 3:1
MAXIMUM LEVEL 0.5 % THD at 50 Hz (40 ohm source) +28 dBu
DISTORTION at 50 Hz (Source 40 ohms) 0.05% at +20 dBu
PRIMARY INDUCTANCE 25 H approx
DCR Primary 58 Ohms approx
DCR Secondary 10 Ohms approx