6J4WA

Ruggedized miniature 7-pin high-transconductance UHF triode utilizing internal dual grid leads specifically designed for low-noise grounded-grid RF amplifier applications up to 500 MHz. Equivalents: 6J4, 6J4WB, 8532, CV858, 6С2П. Real-Life Examples: HP 410B Vacuum Tube Voltmeter, Tektronix 517 oscilloscope, General Radio 1209-B UHF power oscillator, military radar receiver front-ends.