(!!!!) (Recommended Single 1957) 12AX7 BRIMAR England NOS gray ribbed plates "O" getter 1957 (1.3/1.2ma) (Gm=1700/1900)

1 low noise tube) 12AX7 BRIMAR England NOS gray ribbed plates "O" getter 1957 - in white box - copper grid posts - in white box

1 section) Gm=1700 (1.3ma)

1 section) Gm=1900 (1.2ma)

NOS Gm = 1600+

NOS mA = 1.0ma+

recommended for:

 - ORANGE AD30HTC

- MARSHALL

- BELLARI PHONO

- EAR

- McIntosh

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