This product is a set of three NOS (New Old Stock) Philips Mullard EL34/6CA7 xf2 vacuum tubes with dual halo getters, specifically tested on a rebuilt and calibrated B&K 707 tube tester for mutual conductance (Gm) see photos for extra strong test results. These vintage Mullard xf2 EL34 tubes are known for their quality and reliability, making them a valuable addition for all collectors or enthusiasts of vintage audio equipment. The Mullard brand is well-respected in the vintage electronics community, and the EL34 model is often sought after for its desirable sound quality and compatibility with a wide range of audio devices.
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