Archive for May, 2010


SK 55

I have been watching out for one of these for quite some time, until the recent acquisition of this excellently preserved unit (eb05.10.7.880) from Paul Bigaj, a wonderful gentleman in Werdohl, Germany who always seem to have this or other Braun radio/phone units for sale.

Somehow I think the transport screws* must have disengaged, but the platform came loose as well as the cartridge while my SK55 was crossing the Atlantic to New York:  Normally, the platform is not fixed to the base, it sits or swings on the unit via four springs with the platter weighing it down. Once removed, the platform can be easily taken out of the base. So it must be inserted again very carefully and you have to make sure the springs will fit the corresponding holes. Sometimes one needs several attempts – it’s a little bit tricky!
See the SK55 in action !  The April Fools sound track featuring Jack Lemmon and Catherine Deneuve –

A descendent of the SK 4 (1956) “Phonosuper”,  or what is referred to as “Snow White’s coffin” (“Schneewittchensarg”), this is truly an icon in design history. The SK 4 revolutionized the front-operated combined radios and phonograms, which had been in use since the 1930s. The controls were now positioned on top and covered by a plexiglass lid and this integrated design exerts its influence on so-called compact hi-fi systems to this day. This design is also an early example of the cooperation between the Offenbach Academy of Design and Braun. As such it became the epitome of the functional aesthetics of modern German design.

Original SK 4 (1957)

View Dieter Ram’s discussion and reminiscence of the iconic SK-4 design:

Phonosuper SK 55 tech specs:-

Produced 1963 – 1968 (Frankfurt)

Radio: 6 AM and 10 FM circuits, Broadcast, Long Wave and FM.

Power: A/C (110 and 220V).

Principle: Super-Heterodyne (Super in general); IF-Freq. 455/10700 kHz; 2 AF-stage(s)

Valves/Tubes: 5 ECC85, ECH81, EF89, EABC80, EL84

SK 55 circuit diagram

Speaker: Mono, moving coil 3W

Dimension 22.8 x 9.6 x 11.4″

** For transportation

1. First you have to tighten the two locks marked in the yellow circle. Turn them clockwise.

2. Two other locks need to be disengaged. This is the description for the lock #1 on the left side of the picture:

– 1. Turn it anti-clockwise (1 turn)
– 2. move it to left (see the arrow), you will notice its old position, this area has not been cleaned.
– 3. turn it clockwise again so it remains tight.