{"type_number":"6DA7","canonical_url":"https://tubeofile.com/tubes/6DA7","manufacturer":"Tung-Sol","tube_type_key":"compound","tube_type_display_name":"Compound (multi-section)","base_name":"Noval","description":"Dissimilar double triode in miniature Noval envelope. Section 1 is a medium-mu triode for vertical oscillator service. Section 2 is a low-mu, high-dissipation triode for vertical amplifier service. Combines oscillator and output amplifier for vertical sweep of large 90-degree picture tubes.","is_directly_heated":false,"completeness":"high","notes":["Section 1 (oscillator): medium-mu triode (mu=20), Va max 300V, Pa max 2W. Section 2 (amplifier): low-mu triode (mu=6.3), Va max 500V, Pa max 6W, Ik max 40mA.","Controlled heater warm-up time of approximately 11 seconds. Maximum heater-cathode voltage 200V.","Maximum control-grid voltage: -400V (peak negative pulse) for both sections. Maximum DC control-grid voltage: -50V."],"references":["https://frank.pocnet.net/sheets/127/6/6DA7.pdf","https://tdsl.duncanamps.com/show.php?des=6DA7"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6DA7","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6da7.html"},"raw_equivalents":["6DR7","6DE7","6EM7","6EA7","6FD7","6BN7"],"equivalents":[{"type_number":"6DE7","equivalence_type":"direct","notes":null},{"type_number":"6DR7","equivalence_type":"direct","notes":null},{"type_number":"6EM7","equivalence_type":"direct","notes":null},{"type_number":"6FD7","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"10AD7","reason":"Datasheet states identical except for heater ratings and warm-up time","has_detail_page":true},{"type_number":"6EW7","reason":"Brans lists as related dissimilar dual triode for vertical deflection — check pinout before substituting","has_detail_page":true},{"type_number":"6GF7","reason":"Similar dissimilar dual triode for vertical circuits","has_detail_page":true},{"type_number":"8CY7","reason":"Similar dissimilar dual triode but 8.4V heater — not directly interchangeable","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Grid (section 2)","function_code":"g1_2","notes":null},{"pin_number":"2","function":"Anode (section 2)","function_code":"a2","notes":null},{"pin_number":"3","function":"Cathode (section 2)","function_code":"k2","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":"Anode (section 1)","function_code":"a1","notes":null},{"pin_number":"7","function":"Grid (section 1)","function_code":"g1_1","notes":null},{"pin_number":"8","function":"Cathode (section 1)","function_code":"k1","notes":null},{"pin_number":"9","function":"Internal connection (shield)","function_code":"ic","notes":null}],"specs":[{"key":"Vh","display_name":"Heater 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