{"type_number":"6F23","canonical_url":"https://tubeofile.com/tubes/6F23","manufacturer":"Ediswan Mazda","tube_type_key":"ss_pentode","tube_type_display_name":"Small Signal Pentode","base_name":"Noval","description":"High slope screened H.F. pentode, intended for use as a straight television pentode, suitable for AC or AC/DC operation.","is_directly_heated":false,"completeness":"high","notes":["Pa_max of 3W applies with a grid-cathode resistance not exceeding 10,000 ohms. With max anode dissipation of 2W and max screen dissipation of 0.5W, and a common anode and screen decoupling resistance of not less than 2,200 ohms, the limits are +/-10%.","Ps_max of 1W applies with the same grid-cathode resistance constraint of 10,000 ohms.","Vhk_max of 200V is measured from cathode to the higher-potential heater pin.","Two cathode pins (pins 1 and 3) are provided to minimise lead inductance for RF applications.","Datasheet is marked TENTATIVE (September 1959)."],"references":["https://frank.pocnet.net/sheets/147/6/6F23.pdf","https://frank.pocnet.net/sheets/201/6/6EL7.pdf"],"source_urls":{"r_type":"http://www.r-type.org/exhib/aai0035.htm","tdsl":"https://tdsl.duncanamps.com/show.php?des=6F23","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6f23.html"},"raw_equivalents":["EF812","6EL7","Z749"],"equivalents":[],"similar":[],"pins":[{"pin_number":"1","function":"Cathode","function_code":"k","notes":null},{"pin_number":"2","function":"Control Grid","function_code":"g1","notes":null},{"pin_number":"3","function":"Cathode","function_code":"k","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":"Shield (Internal)","function_code":"ia","notes":null},{"pin_number":"7","function":"Anode","function_code":"a","notes":null},{"pin_number":"8","function":"Screen Grid","function_code":"g2","notes":null},{"pin_number":"9","function":"Suppressor Grid","function_code":"g3","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":"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":"3","numeric_value":"3","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"1","numeric_value":"1","unit":"W","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":"0.6","numeric_value":"0.6","unit":"MΩ","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"170","numeric_value":"170","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"170","numeric_value":"170","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-1.9","numeric_value":"-1.9","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"10","numeric_value":"10","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"2.6","numeric_value":"2.6","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"7000","numeric_value":"7000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"9.2","numeric_value":"9.2","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":"Rk","display_name":"Cathode Resistor (self-bias)","value":"150","numeric_value":"150","unit":"Ω","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.008","numeric_value":"0.008","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"9.0","numeric_value":"9","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"4.0","numeric_value":"4","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T19:03:35.251Z"}