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Beogram 4002: Restoration of DC Motor Video Published - Check It Out!

By popular request (really, I got quite a few emails about this!...;-), I finally completed my Beogram DC motor restoration video! It demon...

Friday, January 5, 2018

Beogram 4002 (5513): Replacement of RPM Trimmer Panel Bulbs with LED Assemblies

After rebuilding the electronics of the Beogram 4002 (5513) that I am currently restoring it was time to replace the light bulbs in the RPM trimmer panel with LED assemblies. LEDs not only last much longer than incandescent bulbs, they also generate far less heat, which is beneficial for the RPM stability of the DC motor that drives the platter. This shows the RPM control panel removed:
To get to the light bulbs their covers need to be removed:
After unsoldering their leads they can be removed together with their aluminum clips:
The replacement LED assemblies
are drop-in and can directly be soldered into the same place:
These parts are available to other B&O enthusiasts. Just send an email or use the contact form on the right if you are interested in getting them.

Once this was done I replaced the covers and tested the panel:
The authentic 'incandescent look' of these LED implants is a result of using carefully intensity tuned red/green LEDs that can mimic the emission spectrum of a low emission light bulb. Now everything is in place to test the DC platter motor after its restoration, which will be next.

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