Philips Saturn-Tonmeister B7D42AS

Philips B7D42AS

This radio was produced in 1964 and is very special in its construction: On the one hand, it's a true tube radio, on the other hand, it contains a tube-less stereo-decoder with four transistors.
Unfortunately, it doesn't work yet. When it's powered on, all tubes glow, but after a few seconds, the radio makes a bang noise and starts smelling badly. Guess, it's a restauration project for me in distant future.

stereo display
The stereo display is impressive. 1964, when LEDs weren't invented yet, Stereo radios normally used tiny lamps for indicating stereo transmissions. But not this radio - it uses a EM 87 tube display for telling the listener about a stereo transmission. Whoa!
Besides the two EM 87 valves (signal strength and stereo indicator), there's also an ECC 85, ECH 81, EAF 801, EF 184, ECC 808 and two ECL 86 inside. The used transistors are two AF 126 and two AC 126 and the nine used diodes are seven AA 119 and two OA 79.

inner workings
You can see here, that this radio was produced at the very end of the line of tube radios, as it already uses a printed circuit board. The rest, the large knobs, the buttons and the large air varicap are used, like the past 40 years before.