{"type_number":"6CH6","canonical_url":"https://tubeofile.com/tubes/6CH6","manufacturer":"GE","tube_type_key":"power_pentode","tube_type_display_name":"Power Pentode","base_name":"Noval","description":"Power pentode designed for RF and AF power amplifier service. Noval base. High transconductance with relatively high anode dissipation for its size. Used in television deflection circuits and audio output stages.","is_directly_heated":false,"completeness":"medium","notes":["GE Essential Characteristics: Pa_max 12 W, Va_max 275 V, Vs_max 275 V, gm 11000 umhos, Rp 50000 ohms.","Philips interchange lists EL821 as the European equivalent, CV2127 as the British military designation.","Sams substitution guide lists 6132 and 7499 as substitutes.","High gm (11000 umhos) and 12 W anode dissipation — more of a power tube than small-signal type despite pentode construction."],"references":["https://tdsl.duncanamps.com/show.php?des=6CH6"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6CH6","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6ch6.html"},"raw_equivalents":["EL821","CV2127","6132","7499"],"equivalents":[],"similar":[{"type_number":"6AG7","reason":"Similar power pentode but Octal base — not pin-compatible","has_detail_page":true},{"type_number":"6CK6","reason":"Similar pentode on Noval base — verify pinout compatibility","has_detail_page":true},{"type_number":"6CL6","reason":"Similar power pentode on Noval base but different pinout and lower gm — not a drop-in","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Control Grid (g1)","function_code":"g1","notes":null},{"pin_number":"2","function":"Cathode","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":"Anode","function_code":"a","notes":null},{"pin_number":"6","function":"Screen Grid (g2)","function_code":"g2","notes":null},{"pin_number":"7","function":"Suppressor Grid (g3)","function_code":"g3","notes":null},{"pin_number":"8","function":"Cathode","function_code":"k","notes":null},{"pin_number":"9","function":"Internal Shield","function_code":"ia","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":"0.75","numeric_value":"0.75","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Power Pentode","tube_type_key":"power_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"275","numeric_value":"275","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"275","numeric_value":"275","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"12","numeric_value":"12","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":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-4.5","numeric_value":"-4.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"40","numeric_value":"40","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"6.0","numeric_value":"6","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"50000","numeric_value":"50000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"11.0","numeric_value":"11","unit":"mA/V","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:20:15.038Z"}