(!!!) (Best Mullard Single) ECF80=6BL8 IEC Mullard UK NOS 1966 (16ma/12ma) (Highest mA and Gm) Title: ECF80=6BL8 IEC Mullard UK NOS 1966

ECF80=6BL8 IEC Mullard UK NOS 1966

Triode = 16ma Gm=6000

Pentode = 12ma Gm=6900

Tested on Amplitrex

Good Triode Ma/Gm=12-14ma Gm=4500-5000

Good Pentode Ma/Gm=8-10ma Gm=5500-6000

– Klein + Hummel Telewatt Stereo-N.o.v.a VS-70 1962

– Scott 222B

– Scott 299B/C

– Scott 350B

– Graaf

– McIntosh