Wobulator

A wobulator is an electronic device primarily used for the alignment of receiver or transmitter intermediate frequency strips. It is usually used in conjunction with an oscilloscope, to enable a visual representation of a receivers passband to be seen, hence, simplifying alignment. The term "wobulator" is a portmanteau of wobble and oscillator.

The term "wobulator" (without capitalization) is a generic term for the swept-output RF oscillator described above, also called a "sweep generator" by most professional electronics engineers and technicians. When capitalized "Wobulator" refers to the trade name of a specific brand of RF/IF alignment generator. The Wobulator was apparently made by a company known as "TIC" although some units branded Allen B. Du Mont Laboratories" and "Stromberg-Carlson" are rumored to exist. These were apparently made under some form of license and branded with the name of the licensee, much as Radio Corporation of America through subsidiary Hazeltine Corp., licensed its KCS-20A television chassis design (used in models 630TS, 8TS30, etc.) to other television manufacturers (Air King, Crosley, Fada, et al.) for production under their brand names. The Wobulator generator, designated model 1200A, combined both sweep and marker functions into a single, self-contained, pushbutton-controlled device which, when connected to an oscilloscope and television receiver under test, would display a representation of the receiver's RF/IF response curves with "markers" defining critical frequency reference points as a response curve on the oscilloscope screen. Such an amplitude-versus-frequency graph is also often referred to as a Bode (pronounced "bodee") plot or Bode graph.