The Museum of T&M Instruments

"The Heathkit model O-12 laboratory oscilloscope, when properly constructed will represent a precision instrument capable of years of service. We therefore urge you to take the necessary time to assemble, wire and test the instrument carefully. Do not hurry the work. Be sure you understand each step in the instructions before you start to do it and you will be rewarded with a great deal of satisfaction." (Heathkit, Manual O-12, 1959-1961)

BRIEF SPECS

Sensivity	0.025 v per inch
Frequency Response	3 cps to 4 mc
Risetime	.08 usec
Sweep Range	10 cps to 500 kc
Power	80 watts
Dimensions	8-5/8" x 14-1/8" x 16"
Weight	20-1/2 pounds
Technology	tube
Price	unknown

The O-12 oscilloscope was sold in kit form. It's time base can synchronize on the input signal which may go beyond 5MHz. The vertical amplifier and the time base are not calibrated. It took long to find a graticule for this scope - I even thought it never had one. The user had to check the signal by it's shape without a real chance for making accurate measurement. Built around 1961 this one was preowned by the tv lab of FH Giessen-Friedberg. To be exact it's a O-12/E which indicates the export (230V AC) version. The attached probe is a Heathkit model #342.

Note: due to concentration on professional equipment I sold this intrument. This page is still left for the sake of completeness.