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(!!!!!) (BEST OVERALL PAIR) EL37 Mullard NOS black base and brown base gray plate same build NOS 1962-1966 (90.5ma and 91.5ma)
(!!!!!) (BEST OVERALL PAIR) EL37 Mullard NOS black base and brown base gray plate same build NOS 1962-1966 (90.5ma and 91.5ma)
$ 399.99
1 matched pair) EL37 Mullard NOS gray plate, 2 round getter halos, excellent printing, in white boxes
1 tube) 91.5ma Gm=10,200 (black base) 1962 date code wiped off glass
1 tube) 90.5ma Gm=9800 (brown base) 1966 date code wiped off glass
Good NOS range 80-90ma
Good NOS Gm = 10,000
Recommended for
- CARR MERCURY 2003
- Fisher 80-AZ
See more: vacuum tube