• Country
• Netherlands

• Manufacturer / Brand
• Unknown - CUSTOM BUILT: Netherlands Onbekend

• Year
• 1951 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 68755

• Number of Tubes
• 5

• Valves / Tubes
• ECH21 ECH21 EBL21 AZ1 EM4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 127/220 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 18 cm = 7.1 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: Mentor 52 - Unknown - CUSTOM BUILT:

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 495 x 370 x 230 mm / 19.5 x 14.6 x 9.1 inch

• Notes
• It seems to be a radio from Erres/van der Heem, but probably produced for another customer/company. Does anyone knows more about this?

• External source of data
• Eilert Menke

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 6 models, 6 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unknown - CUSTOM BUILT: Netherlands Onbekend