(!) 12AU7A Hitachi JAPAN branded Realistic Lifetime NOS ribbed plates 1960 era (9.2/12.2ma)

1 low noise tube) 12AU7A Hitachi JAPAN branded Realistic Lifetime NOS ribbed plates 1960 era gold plated pins - copper grid posts

1 section) 9.2ma Gm=2100

1 section) 12.2ma Gm=2400

Amplitrex Test Data

Good Ma range 8-10ma

Good Gm range 1800-2200