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(Best Overall Pair) M-4242A=242A Standard Electrica Spain NOS 1940's shiney nickel bases original boxes (117ma and 126ma) (FREE UPS EXPEDITED SHIPPING)
(Best Overall Pair) M-4242A=242A Standard Electrica Spain NOS 1940's shiney nickel bases original boxes (117ma and 126ma) (FREE UPS EXPEDITED SHIPPING)
$ 1,999.99
1 PAIR with FREE UPS EXPEDITED SHIPPING
M-4242A=242A Standard Electrica Spain NOS 1940's original boxes
Same build 4242A STC England
bright shiney nickel bases - metal plate - "D" getters
4242A=242A Western Electric
similar to RS-237 Telefunken
Test Data
1 tube) 117ma Gm=4450
1 tube) 126ma Gm=4650
Good mA range 100-120ma
Good Gm = 3600-4000
Technical Data
4242A=242A:
Vplate=1000V max
Iplate=90ma max
Mu=12.5
Work best at 900Vplate and 55ma in SE amp
4242 will work in PP amp at 1100V and low plate current of 10-15ma
See more: vacuum tube
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