502
The 502 is a dual-beam oscilloscope with a high sensitivity of 100 or 200 microvolts/cm, depending of mode. 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.
![](http://w140.com/tekwiki/images/thumb/5/59/Tek_502.jpg/200px-Tek_502.jpg)
Price at July 1959 was $825.