BBC Master nornal PSU temperature?

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andrewvideo
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BBC Master nornal PSU temperature?

Post by andrewvideo » Mon May 06, 2019 7:53 pm

What temperature BBC Master PSU should be. It's getting quite warn. Inside the BBC, I have a Datacentre, Pi Direct, MultiOS, New VideoNuLA and Turo MMC. Later going to add a LM386 Audio Amplifier. I have concerms I am overloading the PSU. I do I need do anything? At somepoint Mark at RetroClilc going to refurbish the BBC when I got the cash together.

Other question which power cables are 5V? (Red & Black). for adding Amplifier.

Thank you guys for the help.

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Elminster
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Re: BBC Master nornal PSU temperature?

Post by Elminster » Mon May 06, 2019 8:26 pm

I should think if it isn’t crashing or getting random weirdness then it is probably fine. Generally solutions are to improve ventilation or swap out to a modern psu. E.g. https://www.waitingforfriday.com/?p=794

Red is 5volts, Black is ground.

Edit: You can see colours in link above.
Last edited by Elminster on Mon May 06, 2019 8:28 pm, edited 1 time in total.

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1024MAK
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Re: BBC Master nornal PSU temperature?

Post by 1024MAK » Mon May 06, 2019 8:58 pm

If the 5V supply voltage is still within specification (4.85V to 5.15V) then it’s fine.
Remember, the PSU is designed to run two 5¼” floppy disk drives, and they need a fair amount of power.

The PSU itself will produce heat, as will the main board and all the expansions. So, yes, the inside will get rather warm. This is normal.

Mark

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