EC90=6C4 Mullard branded Philips UK box plate NOS 1967 Mitcham plant

11ma

Gm=2200

SINGLE TUBE, NOT A PAIR 

Tested on Amplitrex

Vplate=250V

Vgrid=-8.5V

Good Ma range 8-10ma

Good Gm range 1800-2200

Recommended for

- Conrad Johnson PV14L2, PV15 preamp
- Conrad Johnson MET1 (6 Channel preamp)
- Conrad Johnson Classic preamp 2010
- Conrad Jognson Classic SE 2011
- Conrad Johnson ET-2 preamp
- Heathkit amp
- Supratek Chenin phono pre