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This is a conversion of a B&O radio/amplifier from ca 1964 to a portable, battery powered boombox for stylish picnics in the park!
I was given an old B&O stereo radio and decided to do something interesting with it. Here are the main parts that I used in the project.
Time to look inside and start to remove the old electronics.
I had to have something in the bottom of the box to put the battery on so I made a baseplate of a piece of aluminium.
I kept some of the PCB so I could keep the frontpanel buttons, one is used for power on/off. This is the a test with the battery and ...
I put in some screws and nuts to stop the battery from sliding around.
I needed a way to mount the amplifier on top of the battery so I used some scrap aluminium bent in an L-shape.
I managed to fit the amplifier just below the wire for the original tuning indicator for the radio, it looks nice if the tuning control is turnable even ...
Added a pair of goldplated RCA-jacks to be used as input/output to the amp if i want to use external equipment or connect it to a bigger setup ...
I wanted the machine to show power on and also look like it originally did so I added some PCB's with green LEDs to illuminate the fron, "Stereo"-indicator ...
I wanted to change as little as possible but a real boombox needs a carrying handle! I found a nice aluminium handle on an old Compaq server.
Since the case wasn't designed to be carried I had to reinforce the thin wood with some sheetmetal to make it take the weight of the electronics and ...
I tested it but noticed that the 40+ years old speakers wasn't quite up to it... I went out and bought a pair of modern coaxial carspeakers instead. ...
I put on some new rubber feet, the old ones disintegrated when I tried to clean them...
Here is pictures of the first test-run with everything in place, it works!
It turned out great, good sound, pretty loud but a bit heavy. Expected batterylife should be around 14 hours at medium volume, I'll test it and post the ...
This is what's left after the build...
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