• Country
• Netherlands

• Manufacturer / Brand
• Erres, Van der Heem NV; Den Haag

• Year
• 1958 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 334594

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

• Number of Transistors
• 140

• Semiconductors
• OC44 2N404 OA70

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 220 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Electronic Counter 9908-03 - Erres, Van der Heem NV; Den

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 320 x 230 x 185 mm / 12.6 x 9.1 x 7.3 inch

• Notes

• The 9908-03 is an electronic counter based on germanium transistors and made in the late 1950's by Van Der Heem in The Netherlands (later a part of Philips). Its unique feature is the display, which consists of six moving coil meters, each one representing a digit from 0 to 9.

  It is still remarkably accurate because of its oven controlled crystal oscillator. It will count frequencies up to and over 1 MHz. The functions are: frequency, period, time, count and test.

  The unit folds open like a briefcase and reveals 25 printed circuit boards, packed with discrete components, among which are 134 OC44 and 6 2N404A germanium transistors and over 200 OA70 germanium diodes. Semiconductors are only listed once per type.

  The MC02M oven controlled crystal oscillator was made in the UK by Cathodeon and operates at 55°C.

• Net weight (2.2 lb = 1 kg)
• 6.2 kg / 13 lb 10.5 oz (13.656 lb)

• Mentioned in
• - - Manufacturers Literature

• Author
• Model page created by Charles Ouweland. See "Data change" for further contributors.

• Other Models

• Here you find 405 models, 324 with images and 213 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Erres, Van der Heem NV; Den Haag