• Country
• United States of America (USA)

• Manufacturer / Brand
• Tektronix; Portland, OR

• Year
• 1950

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 161118

• Number of Tubes
• 3

• Valves / Tubes
• 12AX7 12AU7 12AU7

• Main principle
• none

• Wave bands
• - without

• Power type and voltage
• Other, details in remarks or not known.

• Material
• Metal case

• from Radiomuseum.org
• Model: Pre Amplifier 122 - Tektronix; Portland, OR

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

• Dimensions (WHD)
• 10.62 x 4.5 x 6 inch / 270 x 114 x 152 mm

• Notes
• Power Requirements: from batteries through a plug: -90V at 4mA; +135V at 5mA; 6.3V at 0.9A
  The 122 PreAmplifier was designed specifically to increase the sensitivity of the Type 512 Oscilloscope to 5uV/cm, over the band of 1/6Hz to 40kHz.Thus a maximum voltage gain of 1000 is available, while a frequency compensated attenuator network permits the gain to be reduced to 100 to accommodate input signals of as much as 0.2V peak amplitude without distortion.
  Maximum Output: -20Vpp
  The tube 2AX7 is special selected for differential balance.

• Price in first year of sale
• 85.00 $

• Source of data
• - - Manufacturers Literature

• Author
• Model page created by Pius Steiner. See "Data change" for further contributors.

• Other Models

• Here you find 386 models, 374 with images and 92 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tektronix; Portland, OR