Performed some simple tests (see video clip below) with the Hewlett-Packard 1741A Oscilloscope (100 MHz) and collected information.
Hewlett-Packard Journal September 1976 (PDF)
1741A Oscilloscope Operating and Service Manual (PDF)
I did not check the HP Active Probe 41800A 5 Hz - 500 MHz together with power supply HP 1121.
Agilent 41800A Atcive Probe - Operation Note (PDF)
Kjell & Company, a Swedish electronics shop, sells a cheap, ca. 40 USD, oscilloscope 100 MHz probe set called Uni-T oscilloskop-prob.