General features
Philips 171A
|
Circuit type |
Superheterodyne, 452kHz IF with delayed AVC |
|
Dimensions |
555x360x225mm, 12kg |
|
Cabinet |
Bakelite, cloth grille, printed glass dial |
|
Loudspeaker |
200mm, moving coil, permanent magnet |
|
Main controls |
Tone, volume/on-off, tuning and waveband switch |
|
Extra controls |
Radio/PU switch |
|
Connections |
Antenna, ground, PU, external loudspeaker |
|
Power |
AC, 110-245V in 6 steps, 50W |
Wave
bands
|
MW |
192-580m |
|
SW 1 |
40.5-120m |
|
SW 2 |
13-38.5m |
Circuits
and Tubes
|
RF preamplifier |
EF39 remote cutoff pentode |
|
Oscillator and mixer |
ECH35 triode-hexode |
|
IF amplifier |
EF39 remote cutoff pentode |
|
Audio power amplifier and detector |
EBL31 9W pentode-duodiode |
|
Rectifier |
AZ31 dual power diode |
|
Tuning indicator |
EM34 dual sensitivity fluorescent tube-triode |