Welcome to the retro electronics world!

An analog BBD echo gadget (bucket brigade device)

Here is the circuit of an analog delay device, so a simple echo device:

Delay times of up to approx. 50mS can be set. For larger values, an MN3208 can be used instead of the MN3207. However, this one has a different housing and another pin assignment. Even longer delay times can be achieved by connecting several MN3208s in series.

This is my private web presence on the topics of amateur radio, music electronics, self-assembly of devices and the history of technology. Any use of the content beyond personal information, in particular the texts, drawings, circuit diagrams, photos, videos and music, requires my written approval!