Gerard's Philips BX300U

577
Item nr.

Philips BX300U Table top

Predecessor of B3X00U

**Data for Philips BX300U**
Production	Benelux, 1950. Price was fl 165.
Bands	LW (740-2000m), MW (187,5-580m), SW (25-31,58m); IF is 452kHz.
Tubes	UCH42 (conv.), UAF41 (IF and det.), UBC41 (AF amp), UL41 (output), UY41 (Rect.), dial light 8097D.
Cabinet	Bakelite. Size 27x20x16cm. Weight 3kg.
Power	AC/DC 110/220V, 45W.
Documents	Service Docs.

The Design

Around 1950, a cheap radio was not just the solution to listen for people with limited funds, but also as a second set that could be used in various places in the house. So, Philips introduced radios with built-in antenna's. Until the late forties, radio's didn't have antenna's and an aerial had to be connected. Around 1950, loop antenna's were built in the radio's, followed around 1953 by ferrite rods.

Note the special band spread on short wave, bringing the 31m and 25m band spread out to occupy almost the entire dial. This was accomplished with a clever use of mirror frequency reception.

Obtained	12/2022 from Van Reemst via Marktplaats; sn=22719.
Condition	7; defective but looks fine.
Value (est.)	22€.

This Object

A nice set, which came to me in good external state, but defective. Some radio's challenge me with a single nasty fault that is very hard to find, and then suddenly easy to cure. This radio, in contrast, exposed a series of appearently simple problems that turned out quite persistant and hard to cure.

I replaced all paper capacitors (I do that routinely) and found resistor R2/3/4 defective, which I replaced by a 1.6uF ballast capacitor. Then the radio produced more crackles than sounds, after some tests I found the UCH42 to be the cause, and after replacement the sound was fine. The power switch didn't cut the power when switched off. The dial chord slipped.

Part of Gerard's Radio Corner.
Generated by SiteBuilder on 26/2/2024 by Gerard (g.tel@uu.nl)