Description

Microphone Input Transformer VTX-MIC1

1 CT :0.5+0.5 150(Ω) 0dBu

Microphone Input Transformer VTXMIC1 – designed specifically for impedance matching with the pre-amplifier stage

• for microphone pre-amp input circuits, to match microphones to pre-amp
• in tube microphones, for matching high impedance tube circuits to normal output impedance
• for ribbon microphones, to transform very low voltage, very low impedance ribbon motors to normal microphone output levels

Transformer Data Sheet – Click to open and DOWNLOAD

Microphone Input Transformer VTXMIC1

• Microphone input transformer / isolation transformer
  Input impedance: 150 (Ω)
  Input 0dBu max. (@ 20Hz) <1%THD
  Frequency response +/-0.2dB (16Hz – 35kHz)
  Hi-pot, primary to secondaries: 500VDC
  Windings to screens+can: 500VDC
• Fitted with multiple electrostatic screens
  Low distortion Mu-metal core
  Mu-metal screening can reduces electrical noise by up to 30dB
  Operating temperature range: 0 to +70 C
  Storage temperature range: -25 C to +120 C
  Mass = 0.055kg

Electrical characteristics

Specification (test circuit 1):
Turns ratio: 1 to 1 C.T. (series)
DC resistance (W+/-15%)
Primary (8 – 5): 24
Secondary (1 – 4): 22.5
Input impedance (Ω): 2.83k(Ω) (typ.) @ 1kHz
Output impedance(Ω): 194(Ω) (typ.) @ 1kHz
Voltage gain @ 1kHz, -0.59dBu (typ.)
Maximum input @ 20Hz, <1% THD: 0dBu
Insertion loss: 2.3dB (typ.)
Leakage inductance @ 1kHz: (8 – 5) (1/2/3/4 S/C) 1.2mH (typ.)
Capacitance @ 10kHz, 0.1V:
Cp-s: 45pF (typ.) or 5pF (typ.) with screen earthed
Cp-scr: 80pF (typ.)
Cs-scr: 85pF (typ.)

Specification (test circuit 2):
Turns ratio: 1 to 0.5 (parallel wired)
DC resistance (Ω)+/-15%)
Primary (8 – 5): 24
Secondary (parallel) ((1+2) – (3+4)): 5.75
Input impedance(Ω) : 2.83k(Ω) (typ.) @ 1kHz
Output impedance(Ω): 63(Ω) (typ.) @ 1kHz
Voltage gain @ 1kHz, -12.9dBu (typ.)
Maximum input @ 20Hz, <1% THD: 0dBu
Insertion loss: 2.3dB (typ.)
Leakage inductance @ 1kHz: (8 – 5) (1/2/3/4 S/C) 1.2mH (typ.)
Capacitance @ 10kHz, 0.1V:
Cp-s: 45pF (typ.) or 5pF (typ.) with screen earthed
Cp-scr: 80pF (typ.)
Cs-scr: 85pF (typ.)