6DX8=ECL84 GE Hitachi JAPAN 1972 (5.1mA and 13mA) (Shindo)
6DX8=ECL84 GE Hitachi JAPAN 1978 (3.0mA and 14mA) (Shindo)
6DX8=ECL84 Motorola Toshiba JAPAN used/good 1960's (3.3mA and 12.5mA) (Shindo)
6DX8=ECL84 RCA Mullard UK NOS 1976 (3.1ma and 18ma) (Shindo Monbrison)
6DX8=ECL84 Zenith Sylvania NOS 1962 (3.7mA and 20mA) (Shindo)
