By popular request (really, I got quite a few emails about this!...;-), I finally completed my Beogram DC motor restoration video! It demon...
Tuesday, January 8, 2019
Beogram 4004 (5526): Replacing the Light Bulbs in the RPM Trimmer Panel with LED Assemblies
The two remaining light bulbs to be replaced in the Beogram 4004 (5526) that I am restoring right now were in the RPM trimmer panel. It is a good idea to replace these bulbs with LED assemblies since they can influence the RPM stability of the platter motor due to their radiated heat that can change the resistance of the RPM trimmers in some cases.
This shows the RPM trimmer panel after taking it out:
I removed the bulb covers
and extracted the bulbs:
This shows the LED assemblies:
I installed them:
and put the covers back on:
This shows the 33 RPM scale illuminated by the LEDs:
The LED assembly combines red and green LEDs to achieve a 'natural incandescent' look, while providing red photons for properly illuminating the scale hand.