Description
DK91 Mullard OS Vacuum Tube – Compact Pentagrid Converter for Vintage Radios
The DK91 Mullard OS is a miniature pentagrid converter vacuum tube designed for use in vintage battery-operated AM radios. As a new old stock (NOS) component, this tube delivers dependable performance with low power consumption, making it ideal for restoring classic portable and tabletop radios from the 1940s and 1950s.
Manufactured by Mullard, a trusted name in British electronics, the DK91 features a durable construction that ensures long-term reliability. It performs dual functions in radio circuits—serving as both oscillator and mixer—which simplifies circuit design and maintains signal clarity across the medium and shortwave bands.
Its compatibility with various vintage radio models makes the DK91 Mullard OS a valuable addition for collectors, hobbyists, and technicians seeking authentic period-correct components. Whether you’re repairing a classic receiver or completing a restoration project, this tube provides consistent, stable operation in low-voltage environments.
Key Features:
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NOS DK91 pentagrid converter tube by Mullard
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Ideal for vintage AM radios and battery-powered receivers
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Combines oscillator and mixer functions in one compact design
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Efficient low-power operation for extended tube life
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Trusted Mullard quality and performance
Rediscover classic radio sound with the device—engineered for enduring precision and vintage audio charm.
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