The Moscow firm made me an order to edit the Assembly instructions for its new product. It will be a MM phonopreamp the miniature tube. My task is to assemble this product as an inexperienced assembler and edit the assembly instructions. The firm kindly agreed to the free publication of the materials. Using this permission, I publish this material on the forum. It may interest the distinguished members of the SBAF and guests of the forum. Unfortunately I gave only the PCB and the tube. The rest of the components will be handed over to me next week. This phonopreamp is built on four identical tubes 6Zh1B Datasheet in Russian This tube has the American counterparts: 5702 Raytheon Mfg. Co.; Cambridge, MA CK5702 Raytheon Mfg. Co.; Cambridge, MA CK605CX Raytheon Mfg. Co.; Cambridge, MA 6148 The 6Zh1b tube is made in the exUSSR and was used only in professional equipment, in the army, in aviation and in space. The tubes, which were handed to me, were made in 1979 and have the stamp of aviation technical control (sign rhomb with the number 7 inside) The preamplifier consists of three PCB The first PCB - input and output connectors In this PCB provides a step adjustment of the input capacitance. The second PCB - preamp The third PCB - anodic stabilizer and heat stabilizer. I hope this work will be interesting.