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Hello everyone! My channel in Zen https://zen.yandex.ru/id/5f7b4d19eb02... I disassembled 400 old push-button telephones! From them I collected SMD elements: transistors, diodes, microcircuits weighing 20.12 grams, all with leads! I decided to check for the presence of precious metals! See for yourself what came of it! Subscribe to the channel and put 👍 if you liked it! Useful videos for beginners! SODIUM FORMATE, WHERE TO BUY? • SODIUM FORMATE sodium formic acid ... How to strip insulation from wires, DEVICE • COPPER FROM WIRES WITHOUT BAKING! HOW TO STRIP ... Copper from wires without baking • COPPER FROM WIRES WITHOUT BAKING! HOW TO OBL... How to get AMMONIUM CHLORIDE (NH4Cl) • PLATINUM REDUCING AGENT FROM A BATTERY!... How to make Sodium Acetate • HOW TO QUENCH ACID IN THE TSAR, WHEN AFF... How to determine Zinc in alloys • HOW TO DETERMINE ZINC? TWO WAYS! Vacuum pump in 5 minutes • VACUUM PUMP IN 5 MINUTES! Bunsen flask in 5 minutes • BUNSEN FLASK! MADE IN 5 MINUTES! Buchner funnel how to make • BUCHNER FUNNEL! DIY! How to make Ferrous Sulfate • HOW TO MAKE PURE FERROUS SULPHATE!... How to make Nitric Acid 43% • NITRIC ACID (HNO₃) 43%, FROM CALCIUM... How to make BORA (SODIUM TETRABORATE) • HOW TO MAKE BORA (SODIUM TETRABORATE... Soda Ash • Soda ash in 1 hour, how to... How to make a reagent for testing gold and silver • HOW TO MAKE A REAGENT FOR CHECKING SULFUR... How to make Stannous Chloride (SnCl2) • HOW TO MAKE STANNUS CHLORIDE (SnCl2) ... How to clean store-bought Ferrous Sulfate • STORE-Bought Ferrous Sulfate HOW TO CLEAN... How to make Distilled Water at Home • Homemade Method for Obtaining Distilled... Handicraft Nitric and Hydrochloric acid • MAKING HANDICRAFTED, NITRIC AND SOL... Solder Solvent • SOLDER SOLVENT IN 5 MINUTES!