Philips B0X17U/01W

1961

Condition and performance:

	Cabinet	60%
	Reception AM	60%
	Sound Quality AM	40%

Features:

	P.U. Entrance:	No
	Tape Recorder Entrance:	No
	Extra Loudspeaker Output:	No
	Loudness:	No
	Treble Control:	No
	Bass Control:	No
	Tone Register Switches:	No
	AM Bandwidth Switch or Control:	No
	Tuning Indicator:	No
	Build-in Antenna:	Yes, plate antenna
	Build in Ferrite or Window Antenna:	No

Technical Specifications (Partially measured):

	Tubes:	UCH81, UBF80, UCL82, UY89.
	Wave Bands:	MW
	Intermediate Frequency (IF):	452 kHz
	Loudspeaker:	AD 4080 X4 (Not original, better replacement)
	Resonance Frequency Fs:	?
	Frequency Range Power Amplifier:	?
	RMS Output Power at 4 Ohms:	1.25 Watts
	Cabinet:	Bakelite, orange painted
	Dimensions:	26.1 x 14.2 x 14.2 cm
	Mains Power Voltages:	110, 127, 220 Volts~
	Mains Power Consumption	43 Watts
	Retail Price	?

Description:

The Philips B0X17U is the same radio as the Philips B0X15U, but the dial scale is different. It has a white/orange plastic ribbon sheet which shifts in the horizontal direction.
The electronic circuit and performance is the same same as the Philips B0X15U.

Repairs:

Paper/tar capacitor C19 of 100 nF is replaced by an ERO capacitor of 100 nF 1000V.
Reason: This capacitor is exploded due to leakage.

The blue marked components are added components.

R31 an C3 reduces power supply hum on the pre-amp stage.
R42 and C45 prevent the volume potentiometer of the negative AM detection voltage. This results in no crackling sound of operating the potentiometer. The lifetime of the volume potentiometer will also be extended.

Performance:

The reception of the broadcast stations is the same as the Philips B0X15U.
The AD 4080 X4 loudspeaker has more efficiency as the AD 1400/00 loudspeaker, which results in a more powerful sound.
There is no extra RRC network added to improve the low frequency audio reproduction, so the sound quality is harsh and shrill with almost no bass sound. Later the power amplifier section will be modified as of the Philips B0X15U.

Disclaimer:

This radio is directly supplied from the mains power. The high voltage supply is directly taken from the mains power, which means the radio chassis and components carries the 230 Volt~ mains voltage, which is very dangerous. Before making any repairs on the radio or playing the radio without the back plate, use a safety transformer with separate windings. The insulation of the windings must withstand at least 4000 Volts AC as well as a low leakage current of 0.5 mA~ or less.

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