{"type_number":"6065","canonical_url":"https://tubeofile.com/tubes/6065","manufacturer":"Brimar","tube_type_key":"ss_pentode","tube_type_display_name":"Small Signal Pentode","base_name":"B7G","description":"Indirectly-heated variable-mu (remote-cutoff) RF pentode on a 7-pin miniature base (B7G). Designed for use in RF and IF stages of compact radio equipment, suitable for operation under adverse vibration and mechanical shock conditions. Brimar/STC design, registered with RTMA in 1951.","is_directly_heated":false,"completeness":"high","notes":["Variable-mu (remote cutoff) characteristic for AGC-controlled RF/IF stages.","CV4015 is the military designation; M8161 is the Mullard special quality equivalent.","External shield connected to Pin 2 (cathode).","Two sets of typical operating conditions: Vg2=150V and Vg2=200V."],"references":["https://frank.pocnet.net/sheets/201/6/6065.pdf"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6065.html"},"raw_equivalents":["CV4015","M8161"],"equivalents":[{"type_number":"CV4015","equivalence_type":"direct","notes":null},{"type_number":"M8161","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"EF85","reason":"Similar variable-mu RF pentode on B9A base — not pin-compatible","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Control Grid (g1)","function_code":"g1","notes":null},{"pin_number":"2","function":"Cathode (and internal shield)","function_code":"k","notes":null},{"pin_number":"3","function":"Heater","function_code":"h","notes":null},{"pin_number":"4","function":"Heater","function_code":"h","notes":null},{"pin_number":"5","function":"Anode","function_code":"a","notes":null},{"pin_number":"6","function":"Screen Grid (g2) and Suppressor Grid (g3, internal shield)","function_code":"g2","notes":null},{"pin_number":"7","function":"Screen Grid (g2)","function_code":"g2","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":"0.2","numeric_value":"0.2","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Pentode","tube_type_key":"ss_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"250","numeric_value":"250","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"250","numeric_value":"250","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"2.5","numeric_value":"2.5","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"0.6","numeric_value":"0.6","unit":"W","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"90","numeric_value":"90","unit":"V","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"200","numeric_value":"200","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-2.5","numeric_value":"-2.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"8","numeric_value":"8","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"2.1","numeric_value":"2.1","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"1000000","numeric_value":"1000000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"2.5","numeric_value":"2.5","unit":"mA/V","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.007","numeric_value":"0.007","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:13:34.342Z"}