Apple IIe power supply noise

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Joined: Jan 3 2014
Posts: 20

Is this bad?

It is also NOT plugged into the logic board.

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speedyG's picture
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Joined: Nov 16 2011
Posts: 2376
Re: Apple IIe power supply noise

nothing to hear...
nothing to see...
not plugged in anywhere...
IT CAN´T BE BAD !
What´s about the thing we shall judge ???
Did you seriously view your posting and expect another answer ???

just besides - the powersupplies from Apple won´t work proper without any load at all...
it requires a kind of load ( for example an old harddiskdrive connected with an adaptor.... )

speedyG

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Offline
Joined: Dec 20 2003
Posts: 359
Re: Apple IIe power supply noise

If the Apple IIe power supply isn’t plugged into the logic board or other load when turned on, it’ll make a sort of chirping noise. It needs a load to work.

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Joined: Jan 3 2014
Posts: 20
Re: Apple IIe power supply noise

I can never understand what you're trying to say.

speedyG's picture
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Joined: Nov 16 2011
Posts: 2376
Re: Apple IIe power supply noise

pc154864 wrote:

Is this bad?
It is also NOT plugged into the logic board.

Dear pc154864,

if you don´t undesrstand - lets explain:
your question:

is this bad ?

lets just recall: we can´t hear what kind of noise your powersupply makes .....
probably because you can´t print the sound and we can´t hear it ???
So what shall we judge ?????

your statement:
It is also not plugged into the logic board.

lets just recall:

we explained that a powersupply will not operate reliable without any load at all !
the powersupply is dependent to operate with a load or it might not work correct
and therefor the voltages measured at the outlet might not be correct !
In other threads a hint was given to test the powersupply with a harddsik as load...

beyond that it´s useless to add comment...
speedyG

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In early days I had a lot of money but no time - now I have no money but a lot of time....
the second part includes less friends but a lot more joy on life....

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Joined: May 27 2013
Posts: 792
Re: Apple IIe power supply noise

Load = something that the power (In your case, the power supply) gives energy to. The power supply needs [something to give energy to (a load)] so it can function.

Logic Board = Motherboard: The large board inside your Apple Computer. This is the load that your power supply needs to be connected to.

As power is being fed into the logic board/motherboard, the voltages will drop due to the power consumption that the motherboard is using/taking from the power supply.

That is why you can't get accurate voltage readings on a power supply with no load attached to it.

Also, WARNING: NEVER connect an ammeter without a load or you will burn your ammeter or the fuse inside.