Crystal-sets

 

 


Telefunkon "A"  ( 1923 - 25 )





ELKA (Radio-Amato) 1925
Berlin


 

ASAS 
(with headphone)


A/S Elektrisk Bureau Oslo
 

Roland
Denmark

Baduf 1001
  Furtwangen, Baden, Germany
Badische Uhrenfabrik.(1924)

Hjerter-es
Sweden

 


EKA
 

Minim


 

Megro 
Czechoslovakia 

Homebrewed

Sachenwerk: SW
Germany

Brownie: BBC
UK


Unknown  Crystal: Friho
Germany
 


Homebrewed ?