Replace Selenium Rectifier with Silicon Diodes & MOSFET Voltage Dropper in Tube Radios #pcbway#

Electronics Old and New by M Caldeira

description

Only $5 for 10 PCBs and every new member get $5 bonus. + Express 24 hour / 48 hour service on https://www.pcbway.com/ ➠ ➠ ➠ In this video, I’ll show you how to replace the selenium rectifier in vintage tube radios with modern silicon diodes, while maintaining the proper voltage drop. Since silicon diodes have a lower voltage drop than selenium rectifiers, I’ll be using a MOSFET and a trimmer potentiometer to provide an adjustable voltage drop. This allows you to fine-tune the voltage to match the original circuit specs, ensuring your vintage radio operates smoothly without over-stressing any components.

This solution is practical and easy to follow, whether you’re restoring a classic tube radio or simply looking for a modern and safe replacement for the selenium rectifier.

➠ TO ORDER PCB'S: https://www.pcbway.com/project/shareproject/Bridge_Rectifier_with_Mosfet_Voltage_Dropper_2024_09_02_09347b93.html

➠ Links Mentioned in this Video RG Keen's Mosfet Follies: http://www.geofex.com/Article_Folders/mosfet_folly/mosfetfolly.htm

🙏 Want to support the channel? ●●●●●● https://www.patreon.com/mcaldeira https://paypal.me/macaldeira

#TubeRadioRestoration #SeleniumRectifierReplacement #SiliconDiodeFix

●●●● HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM ●●●● ✿ DIY TEST GEAR: The title says it all: https://www.youtube.com/watch?v=7buNHf6HoDw&list=PLy5M_tA9ux7KkjmWX0I0zNocg6NF33EfL

✿ RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment: https://www.youtube.com/watch?v=7xvTGd4ysRE&list=PLy5M_tA9ux7JSYx8z2mw303vx287LHpzf

✿ HowTo's: Various videos on some simple techniques and projects: https://www.youtube.com/watch?v=lgr-J_D6pSU&list=PLy5M_tA9ux7K3B77iUGyLPai3RIvJOrkO

✿ DIY CAPACITOR LEAKAGE TESTER PROJECT: One of the most viewed projects on my channel, with full design description and build instructions. https://www.youtube.com/watch?v=0pySErvzUIY&list=PLy5M_tA9ux7KWexvEjLB0SANSxQXi0zTS

✿ DIY TUBE TESTER PROJECT: Complete design description and build instructions for this really handy device. https://youtu.be/3fCE4uaw_cU?si=BhCnTKKN2NQUDe6v

●●●● Plus full Playlists on some other completed restoration projects on this Channel ●●●●

📻 PHILIPS BX750A: https://www.youtube.com/watch?v=i8U9Lteja5o&list=PLy5M_tA9ux7IG6XgctidGO0u0DeT3_CxF

📻 TELEFUNKEN OPUS 2114: https://www.youtube.com/watch?v=_HO2bjY5vuw&list=PLy5M_tA9ux7LhcZ9h9plfTFmjaM1mcifu

📻 SABA UW-175-Z 3D: https://www.youtube.com/watch?v=cca4i60ZLw4&list=PLy5M_tA9ux7IWL18nsrSf4RnjsuPjHC-p

📻 GRUNDIG 1070: https://www.youtube.com/watch?v=i4J5l0fwhko&list=PLy5M_tA9ux7JgnyYPRWOK763aJ8bg3iCI

📻 SCHAUB-LORENZ GOLDY 58 type 3020: https://www.youtube.com/watch?v=RSbt7qVed78&list=PLy5M_tA9ux7IBse5G--Kl89SPS9sATXfZ

📻 BUSH VHF64: https://www.youtube.com/watch?v=U--6JymkQ1M&list=PLy5M_tA9ux7KsvN5M48cX6cxN4jSz0s3X

📻 GRUNDIG 3060A: https://www.youtube.com/watch?v=7x2sK2GSYeE&list=PLy5M_tA9ux7L8e9h8lrHGREPqcgWO-YQm

📻 TELEFUNKEN OPERETTE 8: https://www.youtube.com/watch?v=5IsACM0mPzs&list=PLy5M_tA9ux7K3SXDv8Hu4uAyl1O7NE5dc

📻 GRAETZ SUPER 171W: https://www.youtube.com/watch?v=MhG-CH0gqm4&list=PLy5M_tA9ux7IjUykGE8neJSI6GUxMl2YG

📻 LOEWE-OPTA MAGNET 3737W: https://www.youtube.com/watch?v=ZSZBJ5sKQm8&list=PLy5M_tA9ux7J_hzDhnF8rs2c7wmgGfRlK

📻 BRAUN ATELIER 3: https://www.youtube.com/playlist?list=PLy5M_tA9ux7L3k5nPRvrk1aH764QRCTqE