{"type_number":"6AG5","canonical_url":"https://tubeofile.com/tubes/6AG5","manufacturer":"RCA","tube_type_key":"sharp_cutoff_pentode","tube_type_display_name":"Sharp Cutoff Pentode","base_name":"B7G","description":"Sharp-cutoff RF pentode, miniature 7-pin type. Designed for wideband RF and IF amplifier service at frequencies up to 400 MHz. Indirectly heated cathode.","is_directly_heated":false,"completeness":"high","notes":["The 6AG5 was widely used in early television receivers as an RF amplifier and IF amplifier. The 6186/6AG5-WA is the ruggedised military version.","In pentode connection: at Va=250V, Vg2=150V, Vg1=-5.5V, Ia=5.5mA, Rp=10kΩ (approx), Gm=3800 umhos. At Va=100V, Vg2=100V, Ia=4.5mA, Gm=4500 umhos.","In triode connection (g2 tied to plate): at Va=180V, Rk=330Ω, Rp=8000Ω (approx), mu=45, Gm=5700 umhos. At Va=250V, Rk=820Ω, Rp=8000Ω (approx), mu=42, Gm=3800 umhos.","Capacitances vary depending on presence of external shield (pin 7). With external shield: Cgp=0.020 max pF. Without shield: Cgp=0.030 max pF."],"references":["https://frank.pocnet.net/sheets/049/6/6AG5.pdf","https://tdsl.duncanamps.com/show.php?des=6AG5"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6AG5","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6ag5.html"},"raw_equivalents":["6AG5WA","6186","EF96","CV2280"],"equivalents":[],"similar":[{"type_number":"6BC5","reason":"Similar sharp-cutoff pentode on B7G base but higher Gm (4700 vs 5000 umhos) — not identical operating points","has_detail_page":true},{"type_number":"6CE5","reason":"Similar sharp-cutoff pentode on B7G base — different operating points","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Control Grid (g1)","function_code":"g1","notes":null},{"pin_number":"2","function":"Cathode","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":"Plate","function_code":"a","notes":null},{"pin_number":"6","function":"Screen Grid (g2)","function_code":"g2","notes":null},{"pin_number":"7","function":"Cathode, Internal Shield","function_code":"k","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":"0.3","numeric_value":"0.3","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Pentode","tube_type_key":"sharp_cutoff_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"2.0","numeric_value":"2","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":"150","numeric_value":"150","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-5.5","numeric_value":"-5.5","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":"10000","numeric_value":"10000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"5.0","numeric_value":"5","unit":"mA/V","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.03","numeric_value":"0.03","unit":"pF","param_group":"capacitances"},{"key":"Cgk","display_name":"Grid-to-Cathode Capacitance","value":"6.5","numeric_value":"6.5","unit":"pF","param_group":"capacitances"},{"key":"Cak","display_name":"Anode-to-Cathode Capacitance","value":"1.8","numeric_value":"1.8","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:15:14.658Z"}