ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
hi hopping some one can help me ..i have a beogram 4004 with a burnt bulb for the foto resistor.want to replace it but not sure of the watts and volts ..i think 20 volts. thanks
Do you mean the Photo-resistor for the sliding Ruler?
If so, it is an infra-red LED, and you can't see any visible light.
You can do a normal diode check with a multimeter, to determine if it is OK.
Unless someone has fiddled with the circuit, and destroyed it, these usually last a lifetime.
Did you try to test it by putting 20V across the terminals - then you've destroyed it for sure.
If you are referring to the lamp at the base of the tonarm, then that can be replaced by a white LED, with 1K 1Watt dropping resistor.
Menahem