(!!) (BEST OVERALL SINGLE) 7730=12AU7 Raytheon gold plated pins NOS 1960's (10/11ma)

$ 0.00

1 low noise tube) 7730=12AU7 Raytheon gold plated pins NOS 1960's some small scrapes on pins from testing tube

10ma Gm=2100

11ma Gm=2200

PAIRS SOLD OUT

Good Ma range 8-10ma

Good Gm range 1800-2200

7728=12AT7

7729=12AX7

7730=12AU7

made by Raytheon and CBS

for super-critical instrumention purposes in the early 1960's