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General features
Philips model 522U
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to main radio page
General features
|
Radio type |
Mains powered table radio |
|
Circuit type |
Superheterodyne, 115kHz IF with simple AVC |
|
Dimensions |
|
|
Cabinet |
Wood, Bakelite bezel, cloth grille, celluloid dial |
|
Loudspeaker |
200mm, moving coil, permanent magnet |
|
Main controls |
Volume, tuning, waveband switch/on-off, tone |
|
Connections |
Antenna, ground |
|
Power |
AC or DC, 110 or 240V |
Wave bands
|
LW |
800-1900m |
|
MW |
200-550m |
Circuits and Tubes
|
Oscillator and mixer |
CK1 octode |
|
IF amplifier |
CF2 remote cutoff pentode |
|
Detector and AVC |
CB1 duodiode |
|
Audio amplifier |
CF1 sharp cutoff pentode |
|
Audio power amplifier |
CL2 power pentode |
|
Rectifier |
CY1 power diode |
|
Heater current regulator |
C1 or C9 resistance tube according to mains voltage |