502
The 502 is a dual-beam oscilloscope introduced in 1958, followed by the 502A in the early 1960's. Both beams have differential inputs. When set for maximum sensitivity, the 502A is 100 microvolts/cm and has a vertical bandwidth of 50 kHz. At lower sensitivity settings the bandwidth increases. At 200 mV/cm the bandwidth is 1MHz. At 100 mV/cm and 1 kHz, the common-mode rejection ratio of the 502A is 40,000:1.
There is a transistor-regulated 6.2V DC heater supply for the tubes in the first stage differential amplifier. This heater supply uses the -150 V supply as its reference. The -150 V supply uses a 5651 voltage reference tube as its reference. There is no post-deflection acceleration. The CRT cathode voltage is -2900V.
There is a 502, a 502A, and a rack-mount model, the RM502A. The price of the 502 in July 1959 was $825.
Mod 104 on a 502 provides single sweep lockout.
-
-
-
502 front view
-
502A block diagram
-
502A vertical amplifier
-
RM 502A
-
RM 502A display
-
RM 502A bottom
-
RM 502A transformer wiring
-
RM 502A top
-
RM 502A vibration-isolated vertical amp
-
502 left
-
502 right
-
502 bottom