We received this donation of a Type 531 oscilloscope table. The wood workmanship is extremely well done and has a nice glass top with decorative grooves.. It adorns our entry into the museum. The color choice is a bit unusual for a Tektronix oscilloscope but we decided to leave it as-is.

The Type 531 is a 10 MHz oscilloscope that accepts letter-series and 1-series plug-ins. The 531 and 535 were the first Tektronix scopes to accept plug-ins and both were introduced in March 1954. The 531 was replaced in 1959 by the Type 531A, which has more convenient controls and a slightly faster 15 MHz vertical amplifier. The designer of the 531 was Dick Rhiger.