• Country
• United States of America (USA)

• Manufacturer / Brand
• Special Products Co. (brand SPECO); Silver Spring, MD.

• Year
• 1946/1947

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 217142

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

• Number of Tubes
• 3

• Valves / Tubes
• 1S5 1S5 3S4

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries / 2 x 1.5 ; 1 x 67.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm

• Power out
• 0.27 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Signal Tracer STAB - Special Products Co. brand

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 6.5 x 6.5 x 5.375 inch / 165 x 165 x 137 mm

• Notes
• The portable battery operated signal tracer is housed in a steel case, with carrying handle and cover, weighing only 4 lbs. 10 oz. To prevent accidental battery drain, the main switch must be turned off in order to close the cover. An extra long probe lead is used, to permit placing the tracer on an automobile seat when checking the car radio.

• Net weight (2.2 lb = 1 kg)
• 4 lb 9 oz (4.563 lb) / 2.071 kg

• Source of data
• - - Manufacturers Literature

• Literature/Schematics (1)
• - - Manufacturers Literature

• Author
• Model page created by Heiko zur Mühlen. See "Data change" for further contributors.

• Other Models

• Here you find 3 models, 3 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Special Products Co. (brand SPECO); Silver Spring, MD.