{"type_number":"7105","canonical_url":"https://tubeofile.com/tubes/7105","manufacturer":null,"tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Octal","description":"Medium-mu dual triode designed for series voltage regulator applications. Indirectly heated with 12.6V heater. Similar in function to the 6080 but with different ratings and construction.","is_directly_heated":false,"completeness":"high","notes":["Valve Equivalents reference lists this as a double triode with 12.6V heater on an I/O (International Octal) base.","RCA interchange guide lists 6080 as a similar type.","Designed primarily for voltage regulator service — may be encountered in laboratory power supply equipment."],"references":["https://frank.pocnet.net/sheets/127/7/7105.pdf"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_7105.html"},"raw_equivalents":[],"equivalents":[],"similar":[{"type_number":"6080","reason":"RCA interchange lists 6080 as similar — both designed for regulator service but different ratings","has_detail_page":true},{"type_number":"6533","reason":"Similar regulator-service dual triode but different base and ratings","has_detail_page":true}],"pins":[{"pin_number":"1","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Anode (section 1)","function_code":"a1","notes":null},{"pin_number":"4","function":"Control Grid (section 1)","function_code":"g1_1","notes":null},{"pin_number":"5","function":"Anode (section 2)","function_code":"a2","notes":null},{"pin_number":"6","function":"Control Grid (section 2)","function_code":"g1_2","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Cathode (both sections)","function_code":"k","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"12.6","numeric_value":"12.6","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.6","numeric_value":"0.6","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode (each section)","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"3.5","numeric_value":"3.5","unit":"W","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":"-5","numeric_value":"-5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"20","numeric_value":"20","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"280","numeric_value":"280","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"7.0","numeric_value":"7","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"2","numeric_value":"2","unit":"—","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:30:47.275Z"}