{"type_number":"6GW8","canonical_url":"https://tubeofile.com/tubes/6GW8","manufacturer":null,"tube_type_key":"triode_pentode","tube_type_display_name":"Triode-Pentode","base_name":"Noval","description":"High-Mu Triode, Sharp-Cutoff Pentode. Compound tube containing a high-mu triode section and a sharp-cutoff power pentode section in a single 9-pin miniature envelope, designed for audio frequency amplifier applications in radio and TV receivers.","is_directly_heated":false,"completeness":"high","notes":["Triode section Rg1 max is 1 MOhm; pentode section Rg1 max is 0.5 MOhm (fixed bias) or 1 MOhm (cathode bias, typical).","PCL86 (14GW8) is the series-heater equivalent (14.5V/0.3A heater) — not pin-compatible without heater circuit changes.","Inter-electrode capacitance between triode grid and pentode plate can be reduced below 0.002 pF using a shielding ring (22.5 mm diameter, 15 mm height).","Pentode mu of 21 is measured from grid No.1 to grid No.2, not grid-to-anode."],"references":["https://frank.pocnet.net/sheets/049/6/6GW8.pdf","https://www.drtube.com/datasheets/6gw8-rca1965.pdf","https://ozvalveamps.org/6gw8generic.html"],"source_urls":{"r_type":"https://www.r-type.org/exhib/aaa0034.htm","tdsl":"https://tdsl.duncanamps.com/show.php?des=6GW8","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6gw8.html"},"raw_equivalents":["ECL86","CV8297"],"equivalents":[],"similar":[{"type_number":"6F5P","reason":"Soviet triode-pentode (6Ф5П) listed as Russian substitute for ECL86 — similar application but verify pin compatibility and characteristics","has_detail_page":true},{"type_number":"PCL86","reason":"Series-heater equivalent (14.5V/0.3A) — not compatible with 6.3V parallel heater circuits","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Triode Grid","function_code":"g1_1","notes":null},{"pin_number":"2","function":"Triode Cathode","function_code":"k1","notes":null},{"pin_number":"3","function":"Pentode Screen Grid (G2)","function_code":"g2","notes":null},{"pin_number":"4","function":"Heater","function_code":"h","notes":null},{"pin_number":"5","function":"Heater","function_code":"h","notes":null},{"pin_number":"6","function":"Pentode Anode","function_code":"a2","notes":null},{"pin_number":"7","function":"Pentode Cathode, Suppressor Grid (G3), Internal Shield","function_code":"k2","notes":null},{"pin_number":"8","function":"Pentode Control Grid (G1)","function_code":"g1_2","notes":null},{"pin_number":"9","function":"Triode Anode","function_code":"a1","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":"0.66","numeric_value":"0.66","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage 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