{"type_number":"6EW7","canonical_url":"https://tubeofile.com/tubes/6EW7","manufacturer":"Tung-Sol","tube_type_key":"compound","tube_type_display_name":"Compound (multi-section)","base_name":"Noval","description":"Dissimilar double triode utilizing the 9T9 bulb and pin configuration. Section #1 (medium-mu) serves as vertical deflection oscillator. Section #2 (low-mu) serves as vertical deflection amplifier in television receivers.","is_directly_heated":false,"completeness":"high","notes":["Dissimilar dual triode: Section #1 (medium-mu, pins 5/6/7/8) serves as vertical deflection oscillator; Section #2 (low-mu, pins 1/2/3/9) serves as vertical deflection amplifier.","The 9T9 design utilizes a T-9 (1-1/8\" diam.) bulb based to fit most standard 9-pin miniature sockets.","Except for heater characteristics and heater warm-up time, the 6EW7 is identical to the 10EW7 (Tung-Sol datasheet).","Section #1 connects to pins 6, 7 and 8. Section #2 connects to pins 1, 2, 3 and 9.","Heater positive with respect to cathode must not exceed 100V DC component."],"references":["https://frank.pocnet.net/sheets/127/6/6EW7.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6EW7","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6ew7.html"},"raw_equivalents":["10EW7"],"equivalents":[],"similar":[{"type_number":"6DE7","reason":"Same Noval 9HF pinout and identical Section 1 (mu=17.5). Section 2 differs: 6DE7 has lower gm (6.5 vs 7.5 mA/V), higher ra (925 vs 800 ohms), and lower Pa_max (7W vs 10W).","has_detail_page":true},{"type_number":"6DR7","reason":"Same Noval 9HF pinout but Section 1 has much higher mu (68 vs 17.5). Section 2 similar. Brans cross-lists in same group.","has_detail_page":true},{"type_number":"6EM7","reason":"Brans cross-lists in same group. Octal (8BD) vs Noval (9HF) base. Section 1 has much higher mu (68 vs 17.5).","has_detail_page":true},{"type_number":"6FD7","reason":"Same Noval 9HF pinout. Section 1 mu=64 vs 17.5. Section 2 similar (gm=7.5 mA/V, Pa_max=10W). Brans cross-lists.","has_detail_page":true},{"type_number":"6GF7","reason":"Brans cross-lists in same group. Novar base. Section 1 has much higher mu (64 vs 17.5). Different base and pin topology.","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Plate (Unit No.2)","function_code":"a2","notes":null},{"pin_number":"2","function":"Grid (Unit No.2)","function_code":"g1_2","notes":null},{"pin_number":"3","function":"Grid (Unit No.2)","function_code":"g1_2","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":"Plate (Unit No.1)","function_code":"a1","notes":null},{"pin_number":"7","function":"Grid (Unit No.1)","function_code":"g1_1","notes":null},{"pin_number":"8","function":"Cathode (Unit No.1)","function_code":"k1","notes":null},{"pin_number":"9","function":"Cathode (Unit No.2)","function_code":"k2","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":"0.9","numeric_value":"0.9","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Medium-Mu Triode","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"330","numeric_value":"330","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":"Ik_max","display_name":"Cathode Current (max)","value":"22","numeric_value":"22","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"200","numeric_value":"200","unit":"V","param_group":"absolute_max"},{"key":"Rg_max","display_name":"Max Grid Resistor","value":"2.2","numeric_value":"2.2","unit":"MΩ","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":"-11","numeric_value":"-11","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"5.5","numeric_value":"5.5","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"8750","numeric_value":"8750","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"2.0","numeric_value":"2","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"17.5","numeric_value":"17.5","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"4.2","numeric_value":"4.2","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"2.2","numeric_value":"2.2","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"0.4","numeric_value":"0.4","unit":"pF","param_group":"capacitances"}]},{"section_number":2,"section_label":"Low-Mu Triode","tube_type_key":"power_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"330","numeric_value":"330","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"10","numeric_value":"10","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"50","numeric_value":"50","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"200","numeric_value":"200","unit":"V","param_group":"absolute_max"},{"key":"Rg_max","display_name":"Max Grid Resistor","value":"2.2","numeric_value":"2.2","unit":"MΩ","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"150","numeric_value":"150","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-17.5","numeric_value":"-17.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"45","numeric_value":"45","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"800","numeric_value":"800","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"7.5","numeric_value":"7.5","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"6.0","numeric_value":"6","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"9.0","numeric_value":"9","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"7.0","numeric_value":"7","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"1.2","numeric_value":"1.2","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:22:33.447Z"}