• Country
• Great Britain (UK)

• Manufacturer / Brand
• Ekco, E.K.Cole Ltd.; Southend-on-Sea

• Year
• 1954 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 220052

• Number of Tubes
• 4

• Valves / Tubes
• EF91 EF91 EF91 EF91

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Probe Unit N558 - Ekco, E.K.Cole Ltd.; Southend-

• Dimensions (WHD)
• 3.75 x 3.5 x 6.5 inch / 95 x 89 x 165 mm

• Notes
• A quenching probe unit to be used for connecting Geiger-Muller tubes to a scaler counter such as the Ekco N529C.

• Author
• Model page created by George Papaiz. See "Data change" for further contributors.

• Other Models

• Here you find 424 models, 310 with images and 255 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ekco, E.K.Cole Ltd.; Southend-on-Sea