Author Topic: Bang and Olufsen active antenna teardown.  (Read 2428 times)

SeanB

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Bang and Olufsen active antenna teardown.
« on: August 10, 2015, 08:30:26 AM »
This has been sitting around for a long time unused, so I decided to get rid of it. Not exactly high tech, just a simple RF amplifier inside, driving a cable to attach to the radio receiver antenna.

Hi tech is the LED which illuminates the top panel, yellow to emulate a standard incandescent lamp. Note as well the top silkscreen matches the bottom side thin traces exactly, and the use of those lovely Eroe potted electrolytic capacitors in it. Not made in China, made for B&O in Denmark, most likely in the Netherlands. Semiconductors are all made by Phillips as well, and the smaller capacitors are made by Thompson. Resistors probably were also made by Phillips in Europe as well.

Modern one is all made in China, and they would have made the board about 10% of the size as well, along with the transformer not having that nice magnetic shield around it.