502
![](http://w140.com/tekwiki/images/thumb/5/59/Tek_502.jpg/200px-Tek_502.jpg)
The 502 is a dual-beam oscilloscope with a high sensitivity of 100 or 200 microvolts/cm, depending of mode and differential inputs. At 200uV/cm the bandwith was only 100kHz but at 200mV/cm it rised to 1MHz. There was a transistor-regulated heater supply build in.
Price at July 1959 was $825.
Mod 104 on a 502 provides single sweep lockout.
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502 front view