Microphone Input Transformer OEP J30A03C (1+1 : 1+1 | 150 Ohm)

Description

OEP’s J30A03C Microphone Input Transformer ensures a flat frequency response extending below 10Hz. This versatile transformer can be configured for 1 to 1, 1 to 2, or 2 to 1 setups, accommodating various audio needs. With a maximum drive level of +5dBu, it offers galvanic and ground loop isolation. The low distortion mu-metal core, encapsulated within a mu-metal shielding can, provides up to 30dBs of magnetic shielding, complemented by multiple electrostatic screens for enhanced performance.

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Applications

• Microphone input
• Input signal
  • +6dBu max (20Hz)
  • +12dBu max (30Hz)
• Provides galvanic isolation
• DAC output
• Ground loop isolation

Electrical characteristics

• • Ratio:1+1 to 1+1
  • Impedance: 150Ω (primaries in parallel), 600Ω (primaries in series)
  • Voltage gain @1kHz, 0dBu:
    • source 150Ω: +5dBu (wired 1 to 2)
    • source 600Ω: -0.96dBu (wired 1 to 1)

• • Max input @ 20Hz (1% max. THD):
    • +0.5dBu, primaries in parallel
    • +6dBu, primaries in series

• • Common mode rejection ratio: >60dB @ 10kHz
  • Primary DC resistance (connected in series): 34.5Ω +/-15%
  • Secondary DC resistance (connected in series): 40.5Ω +/-15%

• • Leakage inductance (primaries in series) @ 1kHz, 1V: 690uH (typ.)
  • Interwinding capacitance (10kHz-300kHz): 5pF max. (can & screens grounded)

• • Hi-Pot tests:
    • Primaries to secondaries: 500VAC for 2 seconds
    • Windings to screens/core: 250VAC for 2 seconds

• Fitted with multiple electrostatic screens
• Low distortion Mu-metal core
• Mu-metal screening can reduces electrical noise by up to 30dB

• N.B. Do not pass DC through windings.

OEP’s microphone input transformers encompass a variety of specialised audio transformers meticulously designed and manufactured at OEP’s factory facilities in Oxford. The combination of design and manufacturing proficiency enables OEP to exercise precise control over the production process, guaranteeing that each microphone input transformer adheres to the stringent specifications set by its designer. This commitment to build quality directly influences the transformer’s efficiency, resulting in outstanding sound quality and reliability.

• Brand: Oxford Electrical Products (CARNHILL GROUP)
• OEP: founded in 1982
• Made in BRITAIN (Oxford)

Oxford Electrical Products has established itself as a globally trusted brand for the design and manufacture of transformers and power supplies.