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Mullard GZ34 f31 Valves/Tubes Mullard GZ34 Blackburn f31 double O getter. I do not have a tester to confirm value hence reduced price. I used for under 50 hours. It works and sounds as it should. It looks barely used. I have 2 different f31 (see my other listing) so will sale one and keep the other one whichever sell first. Pick up available at Ultimo NSW2007 office hours or Lindfield NSW2070 after hours. Postage $18 flat insured or $10 uninsured with tracking only. Condition: Used Payment Method: Cash on Pickup, Paypal F&F, PayID Region/State: (NSW) New South Wales/Australia By dwbasement 0
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Captain Stanley R. Mullard founded the Mullard Radio Valve Company in 1920 in the United Kingdom, initially to produce high-power transmitting valves for the British Admiralty. Drawing from his engineering background and passion for music, he expanded into audio components, creating vacuum tubes renowned for their reliability and superior sound quality. Acquired by Philips in the 1920s, the brand grew into a dominant force in valves and semiconductors, with production spanning facilities in Mitcham and Southampton.
Mullard focused primarily on vacuum tubes—or "valves"—that powered high-fidelity amplifiers and professional recording equipment, alongside early transistors and audio drivers. Historical products like the 1960s Mullard 510 valve amplifier exemplified their expertise in hi-fi amplification, while their hand-assembled valves became staples in studio and home systems. Though not a modern maker of speakers, turntables, DACs, or headphones, their components influenced entire audio chains.
Today, Mullard holds a revered position as a vintage high-end icon among audiophiles and collectors, celebrated for the "Mullard sound"—warm, detailed, and musical. Reissues and NOS tubes command premium prices in the boutique market, cementing its legacy over a century of craftsmanship amid technological shifts.
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