Minimum Good consider replace when tested on a TV7 is 32/32 = 800 uMhos. Ink Dated ’59’, 1959 NEC JAPAN 12AD7 – 2x Thick Spiked Mica Wafer/Spacers. – Re-Tested against the 12AD7 Engineering Data Sheet Release Specs for Gm & mA .
Minimum Good consider replace when tested on a TV7 is 32/32 = 800 uMhos. Ink Dated ’59’, 1959 NEC JAPAN 12AD7 – 2x Thick Spiked Mica Wafer/Spacers. – Re-Tested against the 12AD7 Engineering Data Sheet Release Specs for Gm & mA .