Up for sale is a rare and highly sought-after matched pair of Mullard EF86 mesh plate pentodes. These British-made tubes are legendary for their low-noise performance and lush, detailed sonic character. Both tubes feature the D24 date code, signifying production at the Mitcham factory in 1962.

Precision tested on our Amplitrex AT1000 digital laboratory system, the results below utilize the Percentage Method against original factory design-center specifications (Ip = 3.0 mA / Gm = 2200 µMhos). This pair is perfectly matched for mutual conductance at over 86% of new specifications.