SHANDOR Ltd.  Plovdiv, Bulgaria

TB4/1250 / ТВ4/1250     MECHANICAL DATA Dimensions in mm Socket : 2422 512 00001 Anode connector: 40626 Net mass : 420 g     CAPACITANCES Anode to all other elements except grid Ca 0.17 pF Grid to all other elements except anode Cg 8.0 pF Anode to grid Cag 7.0 pF TYPICAL CHARACTERISTICS Amplification factor  m 28 Mutual conductance S (Ia 125 mA) 4.5 mA/V TEMPERATURE LIMITS (Absolute limits) Temperature of anode seal   max. 220 °C    Bulb temperature   max. 250 °C   COOLING In general cooling of the tube is not necessary at normal ambient temperature at frequencies below 50 MHz. When the tube is used at or near the limiting values at frequencies above 50 Mc/s, it will be necessary to direct a low-velocity air flow on the anode seal and the bottom of the envelope. RF CLASS C TELEGRAPHY LIMITING VALUES (Absolute limits) Frequency f up to 100 MHz Anode voltage Va max. 4000 V Anode dissipation Wa max. 450 W Grid dissipation Wg max. 50 W Grid current Ig max. 115 mA Cathode current Ik max. 650 mA

   

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     SHANDOR Ltd.  Plovdiv, Bulgaria                                                                 GSM: +359 898 528828

     E-mail: alex_lysenko2000@mail.ru                                                             Phone/Fax: + 359 32 644878

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