{"type_number":"6BD6","canonical_url":"https://tubeofile.com/tubes/6BD6","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 miniature 7-pin (B7G) envelope. Designed for radio-frequency or intermediate-frequency amplifier service with AGC. Miniature replacement for 6SK7.","is_directly_heated":false,"completeness":"medium","notes":["The 6BD6 is the miniature (B7G) replacement for the 6SK7 Octal remote-cutoff pentode. Designed for RF/IF amplifier service with AGC.","Three operating conditions on datasheet: (1) Eb=100V Ec2=100V Vg=-1V Ia=13mA gm=2550; (2) Eb=125V Ec2=125V; (3) Eb=250V Ec2=100V Vg=-3V Ia=9mA gm=2000.","Maximum ratings: Va=300V, Vg2=125V, Pa=3W, Pg2=0.4W, Ik=14mA."],"references":["https://frank.pocnet.net/sheets/127/6/6BD6.pdf","https://tdsl.duncanamps.com/show.php?des=6BD6"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6BD6","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6bd6.html"},"raw_equivalents":["6BA6","EF93","CV2127","6CG6"],"equivalents":[{"type_number":"6BA6","equivalence_type":"direct","notes":null},{"type_number":"6CG6","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"6BH5","reason":"Brans lists as related remote-cutoff pentode on B7G base","has_detail_page":true},{"type_number":"6SK7","reason":"Electrically similar remote-cutoff pentode but Octal base — not pin-compatible","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Grid 1 (Control Grid)","function_code":"g1","notes":null},{"pin_number":"2","function":"Cathode, Grid 3 (Suppressor)","function_code":"k_g3","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":"Anode","function_code":"a","notes":null},{"pin_number":"6","function":"Grid 2 (Screen)","function_code":"g2","notes":null},{"pin_number":"7","function":"Shield (Internal)","function_code":"shell","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":"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":"Vg2_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","numeric_value":"3","unit":"W","param_group":"absolute_max"},{"key":"Pg2_max","display_name":"Screen Dissipation (max)","value":"0.4","numeric_value":"0.4","unit":"W","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"90","numeric_value":"90","unit":"V","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"250","numeric_value":"250","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","numeric_value":"9","unit":"mA","param_group":"typical_operating"},{"key":"Vg2","display_name":"Screen Voltage","value":"100","numeric_value":"100","unit":"V","param_group":"typical_operating"},{"key":"mAg2","display_name":"Screen Current","value":"3","numeric_value":"3","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"800000","numeric_value":"800000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"2","numeric_value":"2","unit":"mA/V","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.005","numeric_value":"0.005","unit":"pF","param_group":"capacitances"},{"key":"Cgk","display_name":"Grid-to-Cathode Capacitance","value":"4.3","numeric_value":"4.3","unit":"pF","param_group":"capacitances"},{"key":"Cak","display_name":"Anode-to-Cathode Capacitance","value":"5","numeric_value":"5","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T19:02:39.625Z"}