Build an Audio Load Switcher – Workshop Speakers or Dummy Load at the Flip of a Relay!

Описание: 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 project build video, I take you through the design and construction of a new Audio Load Switcher—a compact under-shelf fixture that lets me easily switch between my workshop speakers and a resistive dummy load (selectable between 4Ω and 8Ω). This is incredibly useful when working on radios, amps, or other audio gear at the bench.

Unlike my previous version (which used toggle switches that failed over time due to tarnished contacts at low signal levels), this new unit uses high-quality Panasonic relays to handle the switching—clean, reliable, and built to last.

As a bonus, the unit features BNC outputs for left and right channels, so I can monitor audio signals directly on an oscilloscope while testing.

If you’d like to build your own, I’ve shared the PCB layout on PCBWay’s Share Projects section—check the link below. I also share a Google Drive Folder with the Schematic, Gerbers, and 3D print files used to create the enclosure. It’s a great little tool that makes bench testing safer, cleaner, and more efficient.

🎥 XRAYTONYB video:
XRAYTONYB video link:    • Audio Resistor Dummy Load Upgrade for My B...  
   • DIY Transmitter for the MW Band: Stream Mu...  
🔗 PCBWay Shared project:
https://www.pcbway.com/project/sharep...
🔗 Google Drive Shared Files:
https://drive.google.com/drive/folder...

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

This DIY audio load switcher project uses a Panasonic relay to switch between workshop speakers and selectable 4Ω or 8Ω dummy loads. It features BNC scope outputs for real-time signal monitoring, and eliminates common toggle switch failures. Designed as an under-shelf test fixture for audio equipment repairs, the build includes shared PCBs on PCBWay for fellow electronics enthusiasts.

_____HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM____
DIY TEST GEAR: The title says it all:
   • Zener Diode Tester - Part 1. The build.  

RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:
   • How to safely check the Power Transformer ...  

HowTo's: Various videos on some simple techniques and projects:
   • Extend tube radio FM band above 100MHz wit...  

See also playlists on some other completed restoration projects.

PHILIPS BX750A:
   • Philips BX750A tube radio restoration - Pa...  

TELEFUNKEN OPUS 2114:
   • Telefunken Opus 2114 stereo tube radio res...  

SABA UW-175-Z 3D:
   • Saba UW 175-Z 3D tube radio restoration - ...  

GRUNDIG 1070:
   • Grundig 1070 tube radio restoration - Part...  

SCHAUB-LORENZ GOLDY 58 type 3020:
   • Schaub-Lorenz Goldy 58 type 3020 tube radi...  

BUSH VHF64:
   • Bush VHF64 tube radio restoration - Part 1...  

GRUNDIG 3060A:
   • Grundig 3060a tube radio restoration - Par...  

TELEFUNKEN OPERETTE 8:
   • Telefunken Operette 8 tube radio restorati...  

GRAETZ SUPER 171W:
   • Graetz Super 171W tube radio restoration -...  

BRAUN ATELIER 3:
   • Braun Atelier 3  

LOEWE-OPTA TRUXA STEREO 4741W:
   • Loewe-Opta Truxa Stereo 4741W  

SABA FREIBURG W2:
   • Saba Freiburg W2 (WII) restoration  

You may also be interested in ...

CAPACITOR LEAKAGE TESTER:
   • Capacitor leakage tester design & build DI...  

#AudioWorkbench
#DIYTestGear
#PCBProject