{"type_number":"6J6","canonical_url":"https://tubeofile.com/tubes/6J6","manufacturer":"Tung-Sol","tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"B7G","description":"Medium-mu twin triode in miniature 7-pin (B7G) envelope. Two identical triode sections with common cathode. Particularly suitable for push-pull operation and as mixers at frequencies up to 600 MHz.","is_directly_heated":false,"completeness":"high","notes":["The 6J6 features a common cathode for both sections, making it ideal for push-pull circuits. Controlled heater warm-up time on the 6J6A variant (approx. 11 seconds).","Class A1 amplifier (each section): Va=100V, cathode bias 50Ω, mu=38, Rp=7100Ω, gm=5300 umhos, Ia=8.5mA.","Maximum ratings per section: Va=300V, Pa=1.5W (AF amp) or 4.5W (RF amp), Ik=15mA (AF) or 8mA (RF)."],"references":["https://frank.pocnet.net/sheets/127/6/6J6.pdf","https://tdsl.duncanamps.com/show.php?des=6J6"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6J6","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6j6.html"},"raw_equivalents":["6J6A","6J6W","ECC91","CV858","6CC31","6N15P"],"equivalents":[{"type_number":"6N15P","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"12AT7","reason":"Similar medium-mu dual triode but Noval base with separate cathodes — not pin-compatible","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Anode (section 1)","function_code":"a1","notes":null},{"pin_number":"2","function":"Grid (section 1)","function_code":"g1_1","notes":null},{"pin_number":"3","function":"Cathode (common)","function_code":"k","notes":null},{"pin_number":"4","function":"Heater","function_code":"h","notes":null},{"pin_number":"5","function":"Anode (section 2)","function_code":"a2","notes":null},{"pin_number":"6","function":"Grid (section 2)","function_code":"g1_2","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","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":"0.45","numeric_value":"0.45","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode (each section, common cathode)","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"1.5","numeric_value":"1.5","unit":"W","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"100","numeric_value":"100","unit":"V","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"100","numeric_value":"100","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"0","numeric_value":"0","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"8.5","numeric_value":"8.5","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"7100","numeric_value":"7100","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"5.3","numeric_value":"5.3","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"38","numeric_value":"38","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"1.5","numeric_value":"1.5","unit":"pF","param_group":"capacitances"},{"key":"Cgk","display_name":"Grid-to-Cathode Capacitance","value":"2.6","numeric_value":"2.6","unit":"pF","param_group":"capacitances"},{"key":"Cak","display_name":"Anode-to-Cathode Capacitance","value":"1.6","numeric_value":"1.6","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T19:04:22.183Z"}