Description
OEP’s Microphone Matching Transformer X187B – Designed 50 years ago, this microphone transformer produces a ‘warm’ sound and is ideal for vacuum tube amplifiers. Encapsulated in a mu-metal shielding can that provides up to 30dBs of magnetic shielding.
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Electrical characteristics
- Description: microphone matching transformer
- Turns ratio: 1 CT to 9.13
- Impedance ratio: 200 Ohm to 600 Ohm CT to 50k Ohm
- DC resistance (Ω to +/- 15%)
- Primary: 30.9 (total)
- Secondary: 1520
- Leakage Inductance: 135mH (typ.) @ 1kHz, 0dBu, (red/white/blue S/C)
- Interwinding capacitance @ 10kHz: 18.34dBu (typ.)
- Voltage gain @ 1kHz, 0dBu: 18.34dBu (typ.)
- Proof Voltages
- Primary to secondary: 500VDC
- Windings to screening can: 500VDC
- Screening Can: mu-metal
- Dimensions: Length 31mm can and 43mm overall with threaded mounting bush (3/8″)
- Diameter 34mm
- Lead length: 185mm
- Weight: 104g
- 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.
