• Country
• United States of America (USA)

• Manufacturer / Brand
• Tektronix; Portland, OR

• Year
• 1964

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 206340

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

• Number of Tubes
• 7

• Valves / Tubes
• 6DJ8 6DJ8 6EW6 6EW6 6688 6DJ8 7586

• Number of Transistors
• 21

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Sampling Sweep Unit 3T77 - Tektronix; Portland, OR

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 4.25 x 6.25 x 14 inch / 108 x 159 x 356 mm

• Notes
• The Type 3T77 Sampling-Sweep Plug-in Unit is designed for use in all Tektronix 560-series oscilloscopes except the models 560 and 565. It is equipped to drive a digital unit in the 567 Readout Oscilloscope. The unit is capable of variable sweep rates in fifteen steps form 0.2nsec/div to 10microsec/div. The sweep rate at any given setting of the TIME/DIV switch can be increased by about 3 times with the VARIABLE control. While still making extensive use of vacuum tubes, the Model 3T77 also incorporates advanced (for its time) tunnel diode switching in several circuits in the plug-in unit. The Nuvistor, while nominally an RCA 7586, is a specially aged tube, designated Tek part number 157-0080-00, used as a ramp-current generator in the "fast-ramp" circuit of the unit.

• Net weight (2.2 lb = 1 kg)
• 5.75 lb (5 lb 12 oz) / 2.611 kg

• Price in first year of sale
• 650.00 $

• Author
• Model page created by Hank Kaczmarski. 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