Tektronix 568 oscilloscope

This scope has been built around 1968. This is a sampling scope with a bandwidth of 1 GHz. This is truly impressive. So is its weight , ..kg which is quite heavy for a fully transistorised scope. It has a sampling timebase with several trigger modes.

The 568 is one of the most advanced models of Tektronix in its days. It has plugins for horizontal and vertical deflection. It does not have fixed amplifier so its performance is always determined by the plugins used. My Tek 568 had a dual channel sampling Y-amplifier and a sampling time base. These are oplimised for high frequency signals and have 50 Ω inputs. Quite something different from regular scopes. You don't plug these into a circuit and expect it not to be influenced. Tektronix had be 10:1 and 100:1 probes for it, having 500 and 5000 Ω input impedance, respecively, but they were not included with this one. So I'll have to find the somewhat unfamiliar input plugs and tinker some probes myself (I would like to have the .. and .. plugins as well,

This 568 was offered on the Diutch Forum on Old Radios in early 2016 by a retired electronic engineer and radio ham. It has been used at Philips Data systems to measure the timing characteristics of digital IC's and computer circuits. He told me that at the factory there used to be a component tester connected to it, but he dedn have that one. The scope had been sitting in his attick and he hadn't used it for 20 years. He was selling it and hoped it would find someone who was interested in this kind of special equiniment.

I haven't tried it yet. To be continued.