AEG Magnetophone K 1

• Manufacturer: AEG
• Year of manufacture: 1935 (only 4 pieces built)

Technical data:

• Motors: 3
• Tubes: 3 pieces (AF7, AL4, AZ1) [unconfirmed information].
• belt width: 6,5 mm
• tape speed: 1 m/s
• Frequency response: approx. 50 - 6000 Hz
• Playing time: approx. 20 minutes.

Pictures

A sound recording can be found on YouTube. Since the recording is dated 27.04.1935, it can only have been recorded with a K1 series device, presumably the 5th replica device.

https://www.youtube.com/watch?v=OA1oDxRo_lI

A 'real' photo can be found at the Radio Museum: https://www.radiomuseum.org/forum/aeg_k1_magnetophon.html