{"type_number":"6GF7","canonical_url":"https://tubeofile.com/tubes/6GF7","manufacturer":"RCA","tube_type_key":"compound","tube_type_display_name":"Compound (multi-section)","base_name":"Novar","description":"Dual triode with high-mu and low-mu sections in Novar 9-pin construction. Unit No.1 (high-mu) is intended for use as a vertical deflection oscillator. Unit No.2 (low-mu) is designed for use as a vertical deflection amplifier in television receivers.","is_directly_heated":false,"completeness":"high","notes":["Dissimilar dual triode: Unit No.1 (high-mu, pins 8/9/1) is a small-signal triode (mu=64, ra=40 kohm); Unit No.2 (low-mu, pins 2/3/6) is a power triode (mu=5.4, ra=750 ohm, Pa_max=11W).","Novar base (Small-Button Novar 9-Pin, JEDEC No. E9-75). Not to be confused with Noval or Octal base types.","13GF7 is the series-string heater equivalent (13V heater). Not interchangeable without heater supply modification.","The heater current is 0.985A, slightly higher than the 0.9A or 0.925A of similar types.","Pin 7 has no internal connection.","Peak heater-cathode voltage must not exceed 200V. The DC component must not exceed 100V."],"references":["https://frank.pocnet.net/sheets/049/6/6GF7.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6GF7","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6gf7.html"},"raw_equivalents":["13GF7","6GF7A"],"equivalents":[],"similar":[{"type_number":"6DE7","reason":"Brans cross-lists. Noval base. Section 1 has much lower mu (17.5 vs 64). Not a substitute.","has_detail_page":true},{"type_number":"6DR7","reason":"Brans cross-lists in same group. Noval (9HF) vs Novar (E9-75) base. Similar high-mu Section 1 (mu=68 vs 64) but different base.","has_detail_page":true},{"type_number":"6EM7","reason":"Brans cross-lists in same group. Similar Section 1 (mu=64 vs 68) and Section 2 (mu=5.4, ra=750). Octal (8BD) vs Novar (E9-75) base -- different pin topology, not a drop-in.","has_detail_page":true},{"type_number":"6EW7","reason":"Brans cross-lists. Noval base. Section 1 has much lower mu (17.5 vs 64). Not a substitute.","has_detail_page":true},{"type_number":"6FD7","reason":"Brans cross-lists. Noval base. Similar high-mu/low-mu structure. Different base topology.","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Cathode (Unit No.1 - High-Mu Triode)","function_code":"k1","notes":null},{"pin_number":"2","function":"Grid (Unit No.2 - Low-Mu Triode)","function_code":"g1_2","notes":null},{"pin_number":"3","function":"Cathode (Unit No.2 - Low-Mu Triode)","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":"Plate (Unit No.2 - Low-Mu Triode)","function_code":"a2","notes":null},{"pin_number":"7","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"8","function":"Plate (Unit No.1 - High-Mu Triode)","function_code":"a1","notes":null},{"pin_number":"9","function":"Grid (Unit No.1 - High-Mu Triode)","function_code":"g1_1","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":"0.985","numeric_value":"0.985","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"High-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":"-3","numeric_value":"-3","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"1.4","numeric_value":"1.4","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"40000","numeric_value":"40000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"1.6","numeric_value":"1.6","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"64","numeric_value":"64","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"4.6","numeric_value":"4.6","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"2.4","numeric_value":"2.4","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"0.26","numeric_value":"0.26","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":"11","numeric_value":"11","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":"-20","numeric_value":"-20","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"50","numeric_value":"50","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"750","numeric_value":"750","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"7.2","numeric_value":"7.2","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"5.4","numeric_value":"5.4","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":"6.5","numeric_value":"6.5","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"1.4","numeric_value":"1.4","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:24:15.979Z"}