N° d'article : UF89 / Modèle : UF89
Tube électronique UF89
The UF89 is an internally screened variable mu pentode designed for VHF applications in band 1 and band 3 televisions. It is a low impedance device and may have found application in receiver front ends.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A pins is 52 mm long.
Heater : indirect; Uf = 12V; If = 0.1A;Ufk = 150V
Maximum Ratings : Ua = 250V;Pa = 2.25W;Ug2 = 250V
Pg2 = 0.45W;Ik = 16.5mA
Measured Data: Ua = 170V;Ug3 = 0V;Ug2 = 100V;Ug1 =-1V
Ia = 12mA;Ig2 = 4.4mA;S = 4.4mA/V
typical Characteristics : RF Amplifier
Ua = 200V;Ug3 = 0V;Rg2 = 24kOhm;Rk = 130 Ohm
Ug1 =-2V;Ia = 11mA;Ig2 = 3.8mA;S = 3.85mA/V
Ug1 =-20V;Ia = 0mA;Ig2 = 0mA;S = 0.16mA/V
applications : pentode for regulated rf and if-amplifiers in serial heated devices, similar to EF89
Equivalences : 12DA6
Socle : B9A