1 matched pair) EF86 ADZAM made by Valvo Germany NOS 1970 (D) Hamburg plant
1 tube) 3.1ma Gm=2200
1 tube) 2.9ma Gm=2100

SWEET SOUND

Matched on Amplitrex

Vplate=250V

Vscreen=140V

Vgrid=-2V

Good mA = 2.5-3.5mA

Good Gm=1800-2200

Recommended for

– Vox AC10, AC30
– Dr. Z Z-28
– Vox AC15HTVH head (install all Mullard tubes: EF86, 12AX7, EZ81, EL84)
– Eastern Electric M520
– Matchless C-30, SC30
– Bottlehead

– VOX AC30 Heritage
– Microtek UM92.1 mic [ MEYER SOUND LABS (Berkeley, CA) ]
– U67
– Luxman MQ-68C