Description

Microphone Input Transformer VTX-MIC12

1 CT : 2+2 150Ω 8dBu

Microphone Input Transformer VTXMIC12 – 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

Microphone Input Transformer VTXMIC12 Applications:

• Applications:
  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
  Storage temperature range: -25 C to +120 C
• Mass = 0.11kg
  Tolerance on can dimensions: +/- 0.5mm

Electrical characteristics

Specification (test circuit 1):
Turns ratio: 1 C.T. to 4
DC resistance (Ω+/-15%)
Primary (5 – 1): 24
Secondary (6 – 10): 506 (7+9 linked)
Input impedance (Ω): 1.47kΩ (typ.) @ 1kHz
Output impedance (Ω): 3.28kΩ (typ.) @ 1kHz
Voltage gain @ 1kHz, 0dBu: 10.84dBu (typ.)
Maximum input @ 20Hz,<1% THD: 8dBu (typ.)
Insertion loss: 0.3dB (typ.)
Leakage inductance (6 – 10) @ 1kHz: = 9.7mH (typ.)
Capacitance @ 10kHz, 0.1V:
Cp-s: 225pF (typ.) or 5pF (typ.) with screen earthed
Cp-scr: 100pF (typ.)
Cs-scr: 170pF (typ.)

Specification (test circuit 2)
Turns ratio: 1 C.T. to 2
DC resistance (Ω+/-15%)
Primary (5 – 1): 24
Secondary(6+7) – (9+10): 127 (windings in parallel)
Input impedance (Ω): 1.50k (typ.) @ 1kHz
Output impedance (Ω): 821Ω (typ.) @ 1kHz
Voltage gain @ 1kHz, 0dBu: 4.9Bu (typ.)
Maximum input @ 20Hz, <1% THD: +8dBu
Insertion loss: 0.8dB (typ.)
Leakage inductance (6 – 10) @ 1kHz: 9.7mH (typ.)
(6+7) – (9+10): 2.4mH (typ.)
Capacitance @ 10kHz, 0.1V:
Cp-s: 225pF (typ.) or 5pF (typ.) with screen earthed
Cp-scr: 100pF (typ.)
Cs-scr: 170pF (typ.)