SHOWCASE 9. CELL 9-31

	Schematic Diagram To Showcase |  To the Cell To Theme Tours

The WR 1 broadcast receiver was designed by Blaupunkt in 1940. It was a high-quality rugged 6-tube superhet capable of indoor and field operations. Letters "WR" stand for Wehrmacht-Rundfunkempfänger. 

Up to late 1941, the vacuum tubes used in WR 1 receivers were Telefunken metal tubes DCH 11, DF 11 (2 pcs), DAF 11, DC 11 and DDD 11. Because the "11th Series" tubes were designed for civilian radio equipment, to be allowed to WR 1's they had to pass additional military acceptance test. 

There was the 7th tube in WR 1, another DAF 11, which served as microphone amplifier and provided for use of an external record player. 

The WR 1 of 1940 could be powered from AC or DC networks of 90V to 250V or from dry batteries. Filament was provided by two ENL cells (1.25V ea.) with BD 90 dry battery as 90V source. 

WHD = 395 х 485 х 283 mm, weight with batteries - 30 kg. 

By late 1941, Blaupunkt started production of the new model of WR 1 using glass tubes with loctal base designed by Philips and manufactured by Valvo of Hamburg and other companies. The tubes of this so-called "25th Series" (DC 25, DF 25, etc.) were specifically designed for military use. 

Because on the outside both old and new models of WR 1 receivers looked exactly the same yet requiring different spare parts (spare tubes, etc.), Blaupunkt had to mark the WR 1's in a special way. The receivers of the old model were marked by big letter "T" at the top left corner of their front panels while receivers of the new model were marked by big letter "P". This marking was to remind that "T" receivers had Telefunken tubes inside while "P" receivers had Philips tubes. 

Please note that all the WR 1 receivers of Blaupunkt manufacture thru all the production period (1940-1943) had just "WR 1" symbols on their factory labels. There are three different versions of WR 1 factory labels known to us which differ in the way of indicating the Manufacturer's only. 

From the start of production it was Wehrmacht's Manufacturer Code "fvw" - Fertigungskennzeichen (FKZ) of Blaupunkt radio works in Berlin-Wilmersdorf. In 1942 and 1943, Blaupunkt used its regular logo on WR 1's factory labels just as for civilian products, while in between the factory labels of WR 1's (both late and new models) had no logo at all but rather an empty space for presumably some special type of manufacturer's logo which never came true. 

It is important to understand that abbreviations "WR 1/T" for the old model and "WR 1/P" for the new model of WR 1 by Blaupunkt were used by Wehrmacht in documentation only (!!). Apparently it was a combination of "WR 1" symbols from Blaupunkt factory labels and big letters "T" or "P" from the receiver front panels. 

For description in German language, please refer to the 1942 reprint of the 1941 booklet which on our site could be found as Docket 62-42-01. 

Please note that despite there is only WR 1/P mentioned on the front cover (because WR 1/T was discontinued by 1942), there are both WR 1/P and WR 1/T schematic diagrams and specs inside. 

Please note also that abbreviation "WR 1/P" on the cover page of 1941 and 1942 Wehrmacht booklets has nothing to do with another "WR 1/P" which Philips-Valvo placed right to the factory labels of its version of WR 1 receiver which they started to manufacture in Berlin by late 1941 on Blaupunkt documentation.