Description
OEP’s A187A14C microphone input transformer – ideal for high-impedance amplifiers, this input transformer is enclosed in a mu-metal shielding can, offering an impressive 30dBs of magnetic shielding. It features multiple electrostatic screens and dual primary windings, allowing for matching with 150 or 600 ohms to 10k.
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Electrical characteristics
- Winding ratio: 1+1: 8
- Primary impedance (Ω) (secondary loaded with 7360Ω): 150 parallel / 600 series
- DC resistance (Ω +/-15%):
- Primaries: 38 (per winding)
- Secondary: 1085
- Voltage Gain @ 1kHz, -10dBu: 15.6dBu (typ.) (primaries in parallel)
- Maximum input at 20Hz for <1% THD: -6dBu (primaries in parallel)
- Interwinding capacitance @ 20kHz (core grounded):
- Primary 1 to screens: 44pF
- Primary 2 to screens: 64pF
- Secondary to screens: 109pF
- Primaries to secondary: 12pF (primaries in series)
- Proof voltage:
- windings to screens: 250Vrms
- primaries to secondary: 250Vrms
- Operating temperature range: 0 to +70 C.
- Dimensions: Depth 24.2mm, Length 29.4mm, Width 25mm
- Weight: 56g
- 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.
