• Country
• Netherlands

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

• Year
• 1953

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 294354

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

• Main principle
• Special principle (see notes); ZF/IF 467.5 kHz

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Bandbreedteregelaar 993 - Amroh NV Radio Bulletin

• Shape
• Chassis only or for «building in»

• Notes

• Amroh's 993 is a medium frequency bandwidth regulator. It is used in combination with new m.f. transformer 93.
  The 993 was designed to improve audio quality in commercial amplitude modulated radio receivers.
  An example is given to replace the earlier used m.f. transformer 91 with the 93.

  The 993 and 93 combination was introduced in Radio Bulletin December 1953.

• Mentioned in
• Radio Bulletin December 1953

• 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