Brand Philips
Type BX643A
Picture 
Source: Jonathan P. Evans Source: Jonathan P. Evans  
Year 1954
Power AC
Bands LW, MW, SW, FM
Cabinet Wood
Tubes ECC85
ECH81
EBF80
EF85
EABC80
EL84
EZ85
EM80
Notes The front view really doesn't give much impression of the size of this radio. However see how dwarfed the valves are in the rear view. This is a very early VHF set, possibly Philips first attempt at VHF, but certainly not their first attempt and rediculous audio feedback designs. Note the, erm, "creative" connection of the output pentode's grid leak resistor. However, the addition of switch S24 is a nice touch ; it's ganged with the main off switch, immediately silencing the set when the set is switched off. But true to Philips form, there are plenty of complex mechanics to get to grip with. The extra cables for rotating the internal ferrite aerial are one thing, but the wacky tone control is something else. As the tone dial rotates it not only moves a musical note up and down but also flips a switch that controls bass boost while adjusting the treble. At least I *think* thats whats going on !
Data source Jonathan P. Evans
Service documentationThe service documentation can be downloaded from Radiotechniek en Restauratie


(c) 2000-2019 Mario Huizinga

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