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(sold) EL37 Mullard England NOS black plate 1955-1957 (83ma and 85.5ma)

(sold) EL37 Mullard England NOS black plate 1955-1957 (83ma and 85.5ma)

$ 0.00

Sorry, this product is sold out!

1 pair) EL37 Mullard England NOS black plate 1955-1957 

1 tube) 85.5ma Gm=9700 (2 upside-down "cup shape" getter halos)

(R61-B7A=1957), good getter (ON RIGHT)

1 tube) 83ma Gm=10,000 (1 upside-down "cup shape" getter halo)

(1281-K1) date code is from 1955 era, good getter, (ON LEFT)

TUBES PLUGGED INTO OCTAL SOCKETS IN PICTURE

 

Matched on Amplitrex:

Vplate=250V

Screen=250V

Vgrid=-13.5V 

Good Ma range = 70-90ma

 

Recommended for

- CARR MERCURY 2003

- Fisher 80-AZ

- Dared

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