SOWTER AUDIO TRANSFORMERS
REDD47 REPLACEMENT INPUT TRANSFORMER

SOWTER TYPE 9970 - BUY

1:7 Exceptional performance Microphone input transformer. For REDD47, Drip "Four Seven" etc

9970 frequency response
TRIAD HS-29 replacement

APPLICATION. Recording quality microphone transformer designed for this excellent amplifier originally used by the Beatles at Abbey Road.  Ratio 1:7 with 35% secondary tap. Very large 100% Mumetal core and thick Mumetal can. Colour coded leads.Threaded grommet and M3 fixing screws options.

FEATURES Mumetal core for minimal harmonic distortion and exceptional bandwidth. Very high primary inductance for minimal loading on a source up to 600 Ohms. Multiple interleaved windings ensuring exceptionally high frequency response. Very low phase shift ensures excellent transient response. Mumetal can for magnetic shielding. A relatively large core ensures high level capability. Threaded grommet and M3 fixing screws options. For dimensions click HERE
RATIO
1:7 with 35% secondary tap
FREQUENCY RESPONSE (Typical) 600 Ohm source 50 K Ohm load
3 dB 5 Hz and 50 kHz
PRIMARY INDUCTANCE (Typical)
15 H
DC RESISTANCE (Primary typical)
26.3 Ohms
DC RESISTANCE (Secondary typical)
1.62 K Ohms
MAX LEVEL at 50 Hz
+24.4 dBu
Sowter Phase splitterr
9970 connections