1 matched pair) 211=VT-4-C GE NOS 1943 with tube data sheets

1 tube) 108.2ma Gm=4240 JAN-211 no factory code but from 1943 - on left

1 tube) 108.4ma Gm=4200 (66B4) 211

Good NOS range 100-120ma

Good Gm range = 3600-4000 

Recommended for

Air Tight ATM-211

Cary 805

Navison

Cyber Consanance

Ongaku

Tektron

Tron

Jolida JD-3000A

NAT Audio Se1, Se2Se, Se3 (Serbia)

Wyetech