BBC Master nornal PSU temperature?

discuss both original and modern hardware for the bbc micro/electron
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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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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.

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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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.


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