BBC Marconi AXBT microphone

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Marconi AXBT microphone

The BBC Marconi AXB pressure gradient microphone was introduced in 1934, reputedly as a means to avoid the cost of importing RCA44 microphones from the States.

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With its 2.5 inch ribbon and bass proximity boost, it became synonymous with the ‘voice of Aunty’ and an iconic symbol of the Corporation’s global reach.

bbc-axbt-chinese-sectionSubsequently improved with advances in magnetic materials, the T-painted AXBT (see top photo) with Ticonal magnet appeared in 1946 with an improved sensitivity for 6dB more output gain and better transient response.

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Whilst designed primarily for the speaking voice,  a fabulous microphone for ambient applications such as drum overhead with a tight angle of incidence and general room vibe in the modern music studio.

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STC 4038 microphone

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4038 employing the old BBC handkerchief trick

Iconic BBC ribbon design, commercially manufactured under licence by Standard Telephone & Cables using spider technology.

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Developed from the PGS, the 4038 was the BBC’s successful attempt at designing a general purpose pressure gradient microphone, with excellent linear performance at a reasonable size and cost compared to the AXBT.

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The red line is Cole’s master reference microphone, kept in their anaechoic cupboard

Two versions were produced, a 30 Ohm version for outside broadcast and television studios, a 300 Ohm version for the sound studio.

Used just about everywhere in the BBC.

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STC standard T-bar for 4038s, with debatable comb filtering effect

Wonderful on just about everything!