Radio receiver
Date of appearance: 1924
Manufacturer: Nizhniy Novgorod Radio Laboratory
Designer: Oleg Losev
Made in: Nizhniy Novgorod, USSR
Dimensions: 327 × 230 × 190 mm
Weight: 1,2 g
Tags: russiamakes, россияделаетсама, polytech, рдс, политех

Porcelain receiver Crystadin
. Design by O.V. Losev. 
Main merits of the receiver are that it does not require a power source, is very cheap, 
and can be assembled of materials at hand. Due to these merits, detector receivers were 
used widely not only in the first decades of radio broadcasting, but much later as well, 
in the 1930s and 1940s.