• Country
• United States of America (USA)

• Manufacturer / Brand
• Jackson (The) Electrical Instrument CO., Dayton

• Year
• 1963–1975 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 139107

• Number of Tubes
• 1

• Valves / Tubes
• 6AV6

• Wave bands
• - without

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

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Tube Tester 658 A - Jackson The Electrical

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 530 x 190 x 330 mm / 20.9 x 7.5 x 13 inch

• Notes
• Jackson top model capable of testing tubes up to 250V at 125mA, variable signal 0-26VAC and bias 0-26VDC. First series where introduced with 14 sockets on socket bay; UX types, loctal, noval, magnoval, decal, miniature, nuvistor and some special sockets. Later model had only "modern" sockets on socket bay wich is also offered as "upgrade" to owners who had older models. This model also features separate transformers for filament and plate voltage, variable plate voltage in rough and fine adjustment. Altrough tzhe meter indicates transconductance only as percentage and good/bad condition instead of reading in micromhos it is a true "dynamic" type of tester and very reliable. Roll chart is in separate compartment and can be replaced with removing one screw. Calibration is bit complicated and time consuming.

• Net weight (2.2 lb = 1 kg)
• 11 kg / 24 lb 3.7 oz (24.229 lb)

• Source of data
• - - Data from my own collection

• Mentioned in
• - - Manufacturers Literature

• Author
• Model page created by Sinisa Trlin. See "Data change" for further contributors.

• Other Models

• Here you find 64 models, 61 with images and 18 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Jackson (The) Electrical Instrument CO., Dayton