• Country
• Great Britain (UK)

• Manufacturer / Brand
• Marconi Instruments, Marconi-Ekco (MI, MEI)

• Year
• 1960 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 133917

• Number of Tubes
• 4

• Valves / Tubes
• 12AT7 12AX7 12AX7 6X4

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 100-250 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Universal Bridge TF868B - Marconi Instruments, Marconi-

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

• Dimensions (WHD)
• 300 x 500 x 260 mm / 11.8 x 19.7 x 10.2 inch

• Notes
• Inductance: 1 µH to 100 H.
  Capacitance: 1 pF to 100 µF.
  Resistance: 0.1 Ohm to 100 MOhm.
  Q: 0.1 to 10 at 1 kHz; 1 to 100 at 10 kHz.
  tan delta: 0.001 to 0.1 at 1 kHz; 0.01 to 1 at 10 kHz.

• Net weight (2.2 lb = 1 kg)
• 12 kg / 26 lb 6.9 oz (26.432 lb)

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

• Author
• Model page created by Jos Lauth. See "Data change" for further contributors.

• Other Models

• Here you find 94 models, 81 with images and 39 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Marconi Instruments, Marconi-Ekco (MI, MEI)