Greetings,
Looking for help: Wanting to convert a 220v BeoMaster 5000 to 120v. I found the wiring schematic but it doesn't say what type thermal protection (maybe R40) nor how to mount it. Maybe someone has one or has done this? Also, curious if a fan might be better (saw a post about that).
Thoughts?
Thanks for your reply.
Gene
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BeoMaster 5000 voltage conversion to 120v
5 replies
R40 is the NTC resistor for the over-temp protection circuit in the amplifier section.
It has nothing to do with the wiring of the mains transformer.
The mains transformers shown on page 8-4 for 100V and 120V are different from the one used for 110/130/220/240V.
Seeing as you have a Beomaster currently set for 220V:
If you have 110V in your mains, I would convert to that.
If you have 120V mains I would convert to 130V.
If you absolutely must convert to 120V you must replace the transformer with a correct one (8013299, that has a thermal fuse built-in).
You must also replace the mains fuse with one of twice the amp rating. (Half voltage - twice current - same power, also known as Ohms law).
Martin
Many thanks, Martin!
I have 110v but have seen it go to 115v which is why I was thinking 120v--probably too much thinking and not worth changing the transformer.
Thanks for the reminder about the fuse!
Regards,
Gene
I wouldn't worry as long as we are within +/-10%.
I don't think the power plants can guarantee a tighter tolerance anyways.
Martin
Thanks again!
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