06-02-2020, 09:23 AM
I refurbished a Tek transistor curve tracer with an unusual arrangement. A column of digital displays beside the CRT so a photo (Polaroid?) would show the settings. Each dot is a fibre. Additional switches and box with lamps and electronics is on each of the controls. It must have been (a) expensive to make, (b) difficult to assemble. Before that I thought the old valve sets with a map and light pipes from lamps driven by tuning were mad (I think an Austrian make and a Baltic copy).
Gilbert was certainly brilliant, but didn't invent the Gilbert cell at all. Early versions used valves. The 7630 was used for similar circuits.
Gilbert was certainly brilliant, but didn't invent the Gilbert cell at all. Early versions used valves. The 7630 was used for similar circuits.
