• Country
• United States of America (USA)

• Manufacturer / Brand
• General Radio Company; Cambridge (MA)

• Year
• 1940–1953

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 83138

• • alternative name: GenRad

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

• Number of Tubes
• 1

• Valves / Tubes
• 1E5GP or 1L4

• Conflicting model year with tube data.
• The model date contradicts tube dates. [ 1L4 (1942)]

• Power type and voltage
• Storage and/or dry batteries / 3 ; 2× 45 Volt

• Material
• Wooden case

• from Radiomuseum.org
• Model: Megohmmeter 729-A - General Radio Company;

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Dimensions (WHD)
• 175 x 280 x 150 mm / 6.9 x 11 x 5.9 inch

• Notes

• Battery Type 3 Volt: Burgess 2F2H; Battery Type 45 Volt: Burgess W308P with tap at 22.5 V (Probe voltage).

  The 1E5GP tube was used for models produced between approximately 1940 - 1947, and the 1L4 tube was used for models produced between approximately 1947 - 1953.

• Net weight (2.2 lb = 1 kg)
• 3.4 kg / 7 lb 7.8 oz (7.489 lb)

• Price in first year of sale
• 85.00 USD

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• - - Manufacturers Literature (The General Radio Experimenter Volume XV No.2 July 1940)

• Author
• Model page created by Felix Schaffhauser. See "Data change" for further contributors.

• Other Models

• Here you find 241 models, 212 with images and 131 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from General Radio Company; Cambridge (MA)