{"type_number":"6BY6","canonical_url":"https://tubeofile.com/tubes/6BY6","manufacturer":"GE","tube_type_key":"hexode","tube_type_display_name":"Hexode","base_name":"B7G","description":"Dual-control heptode in a miniature B7G envelope. Designed as a gated amplifier for television sync separator and AGC keying applications. Both control grids have sharp-cutoff characteristics, making it suitable as an AM modulator and logic switching device. Indirectly heated.","is_directly_heated":false,"completeness":"high","notes":["GE Essential Characteristics: Dual-Control Heptode, B7G (7CH) base. Va=10V, Vg2=25V, Vg=-2.5V, Pa_max=2W, Va_max=300V, Vg2_max=150V, Rp=1900Ω.","Sams lists 6H31, EH90 as substitutes.","Can function as a logic switching device: both control grids at 0V allow conduction, negative voltage on either grid blocks operation.","Muiderkring Handbook page 152 lists this type."],"references":["https://frank.pocnet.net/sheets/127/6/6BY6.pdf"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6by6.html"},"raw_equivalents":[],"equivalents":[],"similar":[{"type_number":"6BE6","reason":"Similar heptode on B7G base but designed as pentagrid converter, not gated amp","has_detail_page":true},{"type_number":"6CS6","reason":"Similar dual-control heptode on B7G base — same gated amplifier application","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Signal Grid (g1)","function_code":"g1","notes":null},{"pin_number":"2","function":"Cathode, Suppressor Grid (g5)","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+g4)","function_code":"g2","notes":null},{"pin_number":"7","function":"Control Grid (g3)","function_code":"g3","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":"0.3","numeric_value":"0.3","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Heptode","tube_type_key":"hexode","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":"150","numeric_value":"150","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"2.0","numeric_value":"2","unit":"W","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"10","numeric_value":"10","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"25","numeric_value":"25","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-2.5","numeric_value":"-2.5","unit":"V","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"1900","numeric_value":"1900","unit":"Ω","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:19:09.112Z"}