SOWTER AUDIO TRANSFORMERS
75 YEARS OF AUDIO TRANSFORMERS

Type 9540 Microphone Isolator (Identical to type 7026. Option for Soundcraft desks)

9540 connections
Sowter 3575 isolator Mumetal can

APPLICATIONS

For reduction of most kinds of noise on microphone cables. This transformer is identical to type 7025 which was designed for Soundcraft. Pprovide a balanced, isolated line input which will then accept balanced or unbalanced sources. Unbalanced to balanced conversion and vice versa. For helping to ensure Electromagnetic Compatibility (EMC) compliance.

FEATURES

High impedance presents minimal load to source even at 15 Hz. Mumetal core for minimal harmonic distortion. Internal electrostatic shield for high common mode noise rejection. Mumetal can for magnetic shielding. Secondary centre tap for phase splitting etc. Various package options.

This transformer is identical to type 7025 which was designed for Soundcraft.

RATIO 1:1
MAXIMUM LEVEL 0.5 % THD at 50 Hz (40 ohm source) +10 dBu
DISTORTION at 50 Hz (Source 40 ohms) 0.05% at +10 dBu
PRIMARY INDUCTANCE 5H
TOTAL DCR (Referred to primary) 40 Ohms
INSERTION LOSS 200 Ohm source 200 Ohm load 1.3 dB
INPUT/OUTPUT BALANCE >60 dB
FREQUENCY RESPONSE 6k4 ohm source 10k ohm load +/- 1.5 dB 15 Hz to 50 kHz