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TRF receiver
In a dark oak cabinet with Bakelite tuning knob and valve holder.
The receiver uses a 3NF valve, with three integrated triodes, together with two capacitors and four resistors. With this valve, loudspeaker reception of nearby stations is possible. The plate of the first triode works as detector; the other two triodes work as l.f. amplifier. By moving the antenna coil the volume can be changed.
The original price was 39,50 RM. Made in the factory in Berlin-Steglitz.
 Data Valve
Serial number: 21689
Produced: 1.000.000
Dimensions (w×h×d): 19 × 5 × 14 cm
Made in: 1927
Purchased in: 2013
Weight: 900 g
Click on a valve for more information

Circuit 
Description (in German)
User manual (in German)

What was broadcast in 1927?

 

Listen to "My Blue Heaven" by the orchestra of Dajos Béla, singer unknown, recorded in 1927

Deze pagina is voor het laatst bijgewerkt op zaterdag 27 april 2019