Radio valve ECL86 with strong emissions both on triode and pentode.
Sound and Vision:Home Audio and HiFi Separates:Amplifiers and Pre-Amps – Radio valve ECL86 with strong emissions both on triode and pentode.
pentode
Vintage tubes valves 2 X EF86 Mullard BVA British made low noise pentode #10
Electronics:Home Audio Stereos, Components:Amplifiers and Preamps – Vintage tubes valves 2 X EF86 Mullard BVA British made low noise pentode #10