Microphone bridging transformer is designed to be driven from a 150ohms microphone source and for each secondary to be loaded by the 1kohms input impedance typical of microphone preamps. The use of individual Faraday shields on each winding produces excellent RF attenuation. A 30dB magnetic shield package is standard.
Provides 3 additional, isolated balanced outputs as mic splitter
Stops ground loop problems when a mic feeds multiple preamps
High common-mode rejection 120dB at 60Hz
Excellent frequency response and time domain performance
Low insertion loss 2.2dB typical
Audio Transformer Type - Isolation Transformer
Spec Sheet available - Yes
Input Impedance:
423 ohms (1kHz, -20dBu, test circuit 1)
Voltage Gain:
-2.2 dB (1kHz, -20dBu, test circuit 1)
Deviation from linear phase (DLP):
+0.9/-0 ° (20Hz to 20kHz, -20dBu, test circuit 1)
Distortion (THD):
0.022 % (20Hz, -20dBu, test circuit 1)
Maximum 20Hz input level:
-11 dBu (1% THD, test circuit 1)
Common-mode Rejection Ratio (CMRR) 150ohms Balanced Source:
120 dB (60Hz, test circuit 2)
Output Impedance:
285 ohms (1kHz, test circuit 1)
Primary DC resistances:
71 ohms
Secondary DC resistances:
320/400/380 ohms (1 (ORG/YEL)/2 (GRN/BLU)/3 (VIO/GRY))
Capacitances at 1kHz:
320/400/380 pF (secondary 1/2/3 to respective shield and case)
Turns Ratio:
1:10.0
Breakdown Voltage:
250 Vrms (primary or secondary to shield and case, 60Hz, 1 minute test duration)