Топаз Диктофон Д 202

This is a very interesting vintage cassette recorder, the Топаз (Topaz) Диктофон (Dictaphone) Д 202 (D 202). This Soviet dictation recorder, from 1985, runs at the single speed of 2.4cm/s (15/16 IPS), half of the standard cassette tape speed. AC bias, AC erase. Frequency response is 250Hz to 5kHz, though I think perhaps it can record lower frequencies than 250Hz, though I have not verified that with a signal generator. A fascinating collector&website of tape recorders, with its entry on this model recorder, is linked here: Remember, the music shown in this video is NOT BY ME! It is presented to show sound quality of this machine&recording. Hope you all enjoy this recorder&presentation. It is long, that I am aware. I chinwag a whole lot, and some has even been edited out completely, because I chinwag so much. The first part of this video has the descriptions and presentations on voice recording and music recording, then followed by footage of the inside of the recorder, showing the mechanics, electronics, and some description of part of the circuit where I had to troubleshoot the Automatic Level Control (ALC) that was not working properly. Original belts still good, but needed some new capacitors, and a different value resistor to keep the amp from drawing too much quiescent current. And you&see it is surprisingly easy to power this recorder from two 18650 Lithium Ion cells, as opposed to the six C cells. But keep in mind a fuse, as if anything were to short out...