TubePad 6.0 Tube Chart

Quick Reference Data

Name: 45
Use:
Glass tube type used in output stage of radio receivers.
Notes: Requires a four-pin socket and should be mounted in vertical position. Horizontal operation is permissible if pins 1 and 4 are in vertical plane.


 45
Power Triode

Data Source= R-10 & RC-15
Heater or Filament Voltage= 2.5 volts
Heater or Filament Current= 1.5 amperes
EIA Base= 4D
Substitutes. . . . . . . . . None


Capacitances and Design Maximum Values:

C/in. . . . . . . . . . . .        5 pf
C/out . . . . . . . . . . .        3 pf
C/gp. . . . . . . . . . . .        8 pf
Maximum Plate Voltage . . .      275 volts


Typical Operation as a Receiving Tube                   

Description         Ep    Eg   Es  Is  Ip IpMax   Rp    TC   AF    Zl   PO
---------------------------------------------------------------------------
Class A Amplifier  275   -56   -   -  36     -  1670  2100  3.5  4600    2
Class A Amplifier  250   -50   -   -  34     -  1750  2000  3.5  3900  1.6
Class A Amplifier  180 -34.5   -   -  27     -  1900  1850  3.5  3500 0.78
PP Class AB2 Amp   275   -68   -   -  28   138     -     -    -  3200   18
PP Class AB2 Amp   275  775*   -   -  36    90     -     -    -  5060   12

* = Value of cathode bias resistor