• Country
• Netherlands

• Manufacturer / Brand
• Amroh NV (Radio Bulletin monthly), Muiden

• Year
• 1952

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 254494

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 6

• Valves / Tubes
• ECC40 ECC40 EL34 EL34 AZ50 AZ41

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 220 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 15 W (unknown quality)

• Material
• Various materials

• from Radiomuseum.org
• Model: Hoofdversterker HV-215 - Amroh NV Radio Bulletin

• Shape
• Chassis only or for «building in»

• Notes

• Amroh Model HV-215 is a 'Class A' amplifier. Class A means low efficiency(ca. 30%) at very low distortion (ca. 1%).

  The first ECC40's left part gives the necessary voltage amplification. The second half delivers phase inversion to the second ECC40.

  The 2 tubes EL34 work as balanced power amplifiers, as said in Class A.
  The input sensitivity is ca. 650 mV.

  The HV-215 is part of Amroh's so-called '200-serie'.

• Literature/Schematics (1)
• Radio Bulletin (August 1952)

• Author
• Model page created by Rob Majoor. See "Data change" for further contributors.

• Other Models

• Here you find 240 models, 208 with images and 231 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Amroh NV (Radio Bulletin monthly), Muiden