Description:Tektronix Oscilloscope Knob Lot (21 Pcs) - Fits 535A 545A 545 - Set Screws

• Item Specifics
  • Brand: Tektronix
  • Type: Control Knobs / Replacement Parts
  • Compatible Models: 535A, 545A, 531A, 541A, 585A
  • Era / Style: Vintage Tube-Era Test Equipment (1950s–1960s)
  • Material: Phenolic / Bakelite plastic
  Up for sale is a genuine, vintage lot of 21 authentic Tektronix control knobs salvaged from a classic tube-era oscilloscope (compatible with Tektronix 535A / 545A and related letter-series mainframes). This collection includes standard single-shaft knobs as well as multi-part nesting assemblies used for concentric dual-potentiometer controls.Lot Breakdown & Contents:
  • Large Skirted Charcoal Knobs: 9 total pieces (8 open-face top nesting/outer sleeves, 1 solid top with marker line). These are 1/4" shaft size. They measure 1-5/16 x 7/8" with 2 set screws each.
  • Medium Maroon/Red Knobs: 8 total pieces (fluted texture with indicator dot) - 4 are 1/8" shaft size; 4 are 1/4" shaft size. They measure 3/4 x 9/16" with one set screw.
  • Small Charcoal Inner/Upper Knobs: 4 total pieces (indicator dot, designed to slide into or layer onto larger outer shafts). These are 1/4" shaft size. They measure 5/8 x 3/4"; 3 of them have 2 set screws, 1 has a single set screw.
  Condition Report:
  • Mechanical: Fully functional. Every knob retains its original metal insert and metal set screws intact.
  • Cosmetic: Used, authentic vintage condition. There are minor scuffs, dust, with some chips on a couplearound the edges/bases from decades of lab use, but no structural damage or cracks that impact tightening or alignment. Indicators and dots are still visible.

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