Valvola 6CG7Zoccolo Noval, 9 pin miniature (USA pico-9) B9A Utilizzata per Radio/TV-reception etc. Filamento Vf 6.3 Volt / If 0.6 Ampere / Indirect / Specified voltage AND current AC/DC Descrizione Advertised by RCA as miniature version of 6SN7GT in 4th cover of Electronics, January 1955.