Up for sale is 1 piece ultra-rare vintage Mullard EL35 power output pentode tube, brand new in its original Mullard box. Made in Great Britain, this legendary audio tube features classic grey coated glass (smoked envelope) construction, a sturdy black base, and original crisp Mullard BVA markings. Renowned among audiophiles as Mullard’s iconic British pentode answer to the 6L6/KT66 class, offering legendary midrange warmth, dynamic impact, and rich harmonic detail.

As shown, the tube has been thoroughly tested on our laboratory-grade Amplitrex AT1000 tester. The measured plate current (Ip) and transconductance (uMhos) results are calculated against standard factory specifications (72.0 mA / 5500 uMhos) and detailed in the table below.