A little-known place among tourists - and in vain! There is a very interesting exposition with products that were produced at the enterprises of the Armenian SSR. The keeper, Kristina, who is also a tour guide, is a wonderful, friendly woman. Excursions here, by the way, are free (so far).
A small museum is not on the second floor, the entrance is on the left side of the building. It is better to come before 15h, because they may close later. The visit is free of charge. Unfortunately, this is for the most part an exposition of the Soviet past in terms of industrial goods, since almost all enterprises and scientific organizations whose products are currently represented are closed
It is a very interesting museum, you can learn a lot about the Armenian industry, inventions and inventors! And in the museum you can also see a mock-up of the ROTH-54 radio-optical telescope. Definitely an informative exposition, I recommend it)