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This is the fourth part of the Bang & Olufsen Beolab Penta restoration. For the original post, see:
Vintage Bang & Olufsen Penta Restoration “Project Twins” – Part 1
Both amps were completely inoperable. Most of the capacitors were bad, all power transistors were blown, and various other parts needed replacing as well. I unfortunately didn’t take as many pictures of this process as the 100+ degree temperatures of the Texas summer and the lack of A/C in my workshop led me to neglect taking photographs.
Melted and cracked resistors:
More pictures of the burned resistors in the power stage:
Solder completely melted off from the molten-hot fried transistors:
Expanded and exploding large capacitors:
Fabricating a new fuse box:
Three rebuilt amplifiers! Where did the third one come from? I actually found another blown amp on eBay so I bought it and fixed it as well for a spare.
Rebuilding the control boards for the LED screen:
Next: Vintage Bang & Olufsen Penta Restoration “Project Twins” – Part 5
hi there i hope you can help, i received 2 penta 3 speakers only, ones is fine but the other one speakers are fine but amp has loads of problems due to someone trying to fix .
would you know how to fix or would you sell me one of your fixed ones if i sent you this broken one, i do repairs but this looks too messy for me to try its only one i need if not would you know were i could purchase one
thanks delroy
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