Description

Microphone Input Transformer VTX-MIC15

1 CT : 5+5 150Ω 8dBu

Microphone Input Transformer VTXMIC15 – designed specifically for impedance matching with the input stage. I.E. interfaces microphone with the input stage of mixing consoles, pre-amps, and recording devices

• for mic pre-amp input circuits to match microphones to pre-amp
• in tube microphones for matching high impedance tube circuits to normal output impedance
• in 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

High performance microphone input transformer
Input +8dBu max (20Hz) <1%THD

• Fitted with multiple electrostatic screens
  Low distortion Mu-metal core
• Mu-metal screening can reduces electrical noise
  by up to 30dB
• Hi-pot, primary to secondaries: 500VDC
  Windings to screens+can: 500VDC
• Operating temperature range: 0 to +70 C
• Mass = 0.11kg
  Tolerance on can dimensions: +/- 0.5mm

Electrical characteristics

Specification (test circuit 1):
Turns ratio: 1 C.T. to 10 C.T.
Optimum source impedance:150W
DC resistance (W+/-15%)
Primary: 23
Secondary (1+2): 1745
Input impedance (W): 1.46k (typ.) @ 1kHz
Output impedance (W): 20k (typ.) @ 1kHz (150W load)
Voltage gain @ 1kHz, 0dBu: 18.95dBu (typ.)
Maximum input @ 20Hz, 150W, <1% THD: +8dBu
Insertion loss: 0.3dB (typ.)
Leakage inductance (6 – 10) @ 1kHz: 60mH (typ.)
Capacitance @ 10kHz, 0.1V:
Cp-s: 110pF (typ.) or 5pF (typ.) with screen earthed
Cp-scr: 230pF (typ.)
Cs-scr: 190pF (typ.)

Specification (test circuit 2)
Turns ratio: 1 C.T. to 5
Optimum source impedance:150W
DC resistance (W+/-15%)
Primary: 23
Secondary: 433
Input impedance (W): 1.47k (typ.) @ 1kHz
Output impedance (W): 4.9k (typ.) @ 1kHz (150W load)
Voltage gain @ 1kHz, 0dBu: 12.9dBu (typ.)
Maximum input @ 20Hz, 150W, <1% THD: +8dBu
Insertion loss: 0.3dB (typ.)
Leakage inductance (6/7 – 9/10) @ 1kHz: 16mH (typ.)
Capacitance @ 10kHz, 0.1V:
Cp-s: 110pF (typ.) or 5pF (typ.) with screen earthed
Cp-scr: 230pF (typ.)
Cs-scr: 190pF (typ.)