1 matched pair) EF86 Telefunken Germany <> bottom gray shield 1972 NOS in white boxes, in white boxes, tubes came from bulk case of 100

1 tube) 2.9ma Gm=2100

1 tube) 2.9ma Gm=2000

Good Ma range 2.8-3.5ma

Good Gm range 1800-2200

Recommended for

– Microtek Gefell UM92S
– Eastern Electric M520 amp
– VOX AC10
– Soundelux U99 [ LUCKY DEVIL SOUND (Oakland, CA) ]
– Neumann U47, U48, U67
– Manley Baby Tube mic
– Lawson L47MP
– Microtek UM92.1S mic [ CATFISH STUDIO (Lombard, IL) ]
– U67 [Sugar Hill Recording Studios (Houston, TX) “”Abbey Road of the South”” ]
– U67 (Bucbonera Records SL, Spain)
– U67 [ Retromedia Sound Studios (Red Bank, NJ)]
– Blue Bottle [Vertigo Sound Lab (Boulder, CO)]
– U47 [ Kyle Homme (Orange, CA)]
– Shindo Monbrison Phono preamp
– JADIS JP80MC preamp