But it’s the underlying, bleeding-edge, engineering and craftsmanship in this machine that deserves marquee placement in any review. Thermal DesignExactly 70 years ago, Electronic Design covered the design engineering challenges that were solved by Tektronix engineers in “Design Forum: Compact Oscilloscope” (September 1955, Electronic Design magazine). Specifications for the Tektronix 310 oscilloscope shown on those pages called for an instrument weighing about 20 lb. Interestingly, the first PCBs designed at Tektronix were used in this 310 oscilloscope, with two double-sided, paper phenolic designs. The article on the Tek 310’s thermal design can be found on page 38 of the September 1955 edition of Electronic Design, here in the attached PDF: