Philips model 2531
General
features
Radio type |
Early mains powered table radio with separate loudspeaker. |
Circuit type |
Single stage tuned radio frequency, reactive detector |
Dimensions |
|
Cabinets |
Bakelite, with cloth and metal grille |
Loudspeaker |
200mm, moving iron, permanent magnet |
Main controls |
Primary and secondary tuning, reaction, grid bias (volume), waveband switch, power |
Extra controls |
Loudspeaker on/off |
Connections |
Antenna, ground, PU, extra loudspeaker |
Power |
AC, 103-253V in 12 steps |
Wave
bands
Lower band |
950-400m |
Higher band |
400-250m |
Circuits
and Tubes
RF amplifier |
E442 sharp cutoff tetrode |
Reactive detector |
E424N triode |
Audio power amplifier |
C443 directly heated pentode |
Rectifier |
506 directly heated power dual diode |