QYT KT-8900 NÃO TRANSMITE? 🔥💥Veja como consertei ! 🔧

🔧 Burnt-out transistor in the QYT KT-8900? See how to fix it! In this video, I show step-by-step how to diagnose and replace the RF output transistor (MOSFET) of the QYT KT-8900 radio, a popular model that suffers from overheating and heat dissipation problems. You will learn: ✅ How to identify the defect ✅ Ideal tools for maintenance ✅ Desoldering techniques with hot air and soldering iron ✅ Transistor replacement and repeater testing ✅ Tips to avoid future failures 👉 If you like amateur radio, electronics and DIY, subscribe to the Oficinaterapia channel and activate the 🔔 so you don't miss the next videos! 📍 CHAPTERS 00:00 – Introduction 00:46 – Identifying the defect in the QYT KT-8900 02:18 – Tools used 03:54 – Radio design problems 06:06 – Inspection of the burnt transistor 09:46 – Removing the component with hot air 13:19 – Cleaning the board and flux precautions 16:37 – New transistor and soldering preparation 20:50 – Adjustments to the heat sink 22:07 – Testing the radio after repair 24:36 – Contacting a repeater and confirming the repair 27:43 – Final considerations on overheating 31:19 – Tips on soldering and legality in amateur radio 32:27 – Closing and invitation to register 🛠️ TOOLS AND MATERIALS (purchase links) 🔥🔥 Transistor: https://s.click.aliexpress.com/e/_c3K... 🔧 Precision Bit Set: https://mercadolivre.com/sec/1xU7xg1 ⚡ JCD 8898 Soldering Station: https://mercadolivre.com/sec/243yk9N 🔥 Solder Sucker: https://mercadolivre.com/sec/1QLSWCy 🧲 Magnetic Mat for Electronics: https://mercadolivre.com/sec/2NvrxjY 🛒 Anti-Static Tweezers Set: https://mercadolivre.com/sec/2UvySXM 🛒 Isopropyl Alcohol: https://mercadolivre.com/sec/1cDpvph 🛒 Soldering Flux ⚡ 90A Switching Power Supply (see video:    • Fonte Yaesu  13.8V x 30A para Radioamadorismo  ): 🛒 https://mercadolivre.com/sec/1QUBhUn 💬 PARTICIPATE Did you like the video? 👍 Leave a like 💬 Comment on your experience with QYT radios 🔔 Subscribe to the channel [Oficinaterapia] 🤝 Become a member and support the channel: [Become a Member button]