{"type_number":"6BJ6","canonical_url":"https://tubeofile.com/tubes/6BJ6","manufacturer":"Tung-Sol","tube_type_key":"ss_pentode","tube_type_display_name":"Small Signal Pentode","base_name":"B7G","description":"Remote-cutoff (variable-mu) RF pentode in a miniature B7G envelope. Designed for RF and IF amplifier stages with AGC control. Indirectly heated. Brimar classifies as a vari-mu RF pentode.","is_directly_heated":false,"completeness":"high","notes":["Brimar data: at Va=250V, Vg2=100V: Ia=9.2mA, gm=3.8 mA/V, ra=1.3 MΩ. Va_max=300V, Pa_max=3W, Vg2_max=125V.","GE Essential Characteristics lists two entries: one as 'Remote-Cutoff R-F Pentode' (B7G, 7CM base) and one as 'Power Amplifier Pentode' (6CH base). The B7G miniature version is the standard 6BJ6.","Philips interchange lists 7694/E99F as replacement.","Predecessor models include 7A7, 7B7, 6SS7GT."],"references":["https://frank.pocnet.net/sheets/049/6/6BJ6.pdf","https://frank.pocnet.net/sheets/127/6/6BJ6.pdf"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6bj6.html"},"raw_equivalents":["6BJ6A","CV3909"],"equivalents":[],"similar":[{"type_number":"6662","reason":"Sams lists as substitute — same remote-cutoff pentode type","has_detail_page":false},{"type_number":"7694","reason":"Sams and Philips list as replacement — ruggedised variant","has_detail_page":false},{"type_number":"E99F","reason":"European equivalent — Brans and Sams list as substitute","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Control Grid (g1)","function_code":"g1","notes":null},{"pin_number":"2","function":"Cathode, Suppressor Grid (g3)","function_code":"k","notes":null},{"pin_number":"3","function":"Heater","function_code":"h","notes":null},{"pin_number":"4","function":"Heater","function_code":"h","notes":null},{"pin_number":"5","function":"Plate","function_code":"a","notes":null},{"pin_number":"6","function":"Screen Grid (g2)","function_code":"g2","notes":null},{"pin_number":"7","function":"Cathode","function_code":"k","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"6.3","numeric_value":"6.3","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.15","numeric_value":"0.15","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Pentode","tube_type_key":"ss_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"125","numeric_value":"125","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"3.0","numeric_value":"3","unit":"W","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"100","numeric_value":"100","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-3","numeric_value":"-3","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"9.2","numeric_value":"9.2","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"1300000","numeric_value":"1300000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"3.8","numeric_value":"3.8","unit":"mA/V","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:18:19.238Z"}