Philips
model BX765X
General features
|
Circuit type |
Superheterodyne, 452kHz variable
bandwidth IF with delayed AVC |
|
Dimensions |
67 x 39 x 26cm, 18kg |
|
Cabinet |
Wood, cloth grille behind Bakelite
ornaments, external printed glass dial. |
|
Loudspeaker |
250mm, moving coil, permanent
magnet |
|
Main controls |
Tone/bandwidth switch, volume,
on-off switch, tuning, waveband switch, PU switch. |
|
Connections |
Antenna, ground, PU, external
loudspeaker |
|
Power |
AC, 110 to 245V in 6 steps, 75W |
Wave
bands
|
MW |
175-560m |
|
SW |
50-155m |
|
SW |
30.4-51m |
|
SW |
19.4-31.6m |
|
SW |
13.3-20m |
Circuits
and Tubes
|
RF preamplifier |
EF22 remote cutoff pentode |
|
Oscillator and mixer |
ECH21 triode-heptode |
|
IF amplifier |
EF22 remote cutoff pentode |
|
Audio amplifier, limiter, phase
inverter and contrast expansion |
ECH21 triode-heptode and selenium
semiconductor diode |
|
Push-pull audio power amplifier,
detector and AVC |
2x EBL21 9W duodiode-pentodes |
|
Rectifier |
AZ4 dual power diode |
|
Tuning indicator |
EM4 dual sensitivity fluorescent
tube-triode |