Stable Power Supply

[STC]

 Draw your own conclusion.

 

 

[mansr]

What are those devices, and why are US style power sockets at 240 V? That seems rather dangerous.

[BCRich]

They are PS Audio Quintet Outlet Strips. Not sure of their spec’s.

[davide256]

but the point is those aren't 240v plugs, US voltage on those should be 120v. Meters look to have reasonable accuracy for their kind which is board measurement use.

Not lab quality gear for measuring specs like these

 

https://www.tek.com/digital-multimeter

[mansr]

1 minute ago, davide256 said:

but the point is those aren't 240v plugs, US voltage on those should be 120v. Meters look to have reasonable accuracy for their kind which is board measurement use.

Not lab quality gear for measuring specs like these

 

https://www.tek.com/digital-multimeter

The Fluke meters are perfectly suitable for this measurement. The green one is probably a cheaper brand, but it too is almost certainly adequate here.

[marce]

I presume the meters have true RMS measurement, not the easiest thing to do with ultimate accuracy especially if there is noise on the mains, detecting the exact zero crossing point can be an issue, PLC, noise can cause a non monotonic signal.

One would hope the following regulator supplies could easily cope with the slight difference in voltage.

[Racerxnet]

They appear to be 20amp 120v sockets on 1 row and 15 amps on the others. Not sure what is being measured specifically. 

 

Mak. 

[Speedskater]

I would say that those are excellent results. An AC power line has lots of high frequency noise. Each of those meters has it'd own high frequency response curve, so small differences are expected. Also each meter has it's own averaging period and line voltage is always changing so small differences are expected.

* * * * * * *

Try running pure sine waves at different frequencies thru a power amplifier. Set the voltage at near full scale on the meter ranges.

[mansr]

3 minutes ago, marce said:

I presume the meters have true RMS measurement, not the easiest thing to do with ultimate accuracy especially if there is noise on the mains, detecting the exact zero crossing point can be an issue, PLC, noise can cause a non monotonic signal.

One would hope the following regulator supplies could easily cope with the slight difference in voltage.

The Fluke 77 is not true RMS. The other two clearly say they are. Either way, the scary thing here is that the voltage is twice what it should be, not the minor variations.

[STC]

1 hour ago, mansr said:

What are those devices, and why are US style power sockets at 240 V? That seems rather dangerous.

In my early years of high end I was so confused with this. The audiophiles were using US plugs. Some even remove the good UK plug and put the US Hubbell plugs. I still have those with XLO Reference cables. I did hear massive improvement then   
 

p.s. Anyone having problem with AS using Chrome and iPhone?  

[mansr]

39 minutes ago, STC said:

In my early years of high end I was so confused with this. The audiophiles were using US plugs. Some even remove the good UK plug and put the US Hubbell plugs. I still have those with XLO Reference cables. I did hear massive improvement then  

So what's in the picture? Are those devices connected to UK 240V mains?

[PeterSt]

I don't see the danger in 120V vs 240V. If only the toasters go per one slice instead of two.

[mansr]

9 minutes ago, PeterSt said:

I don't see the danger in 120V vs 240V. If only the toasters go per one slice instead of two.

You don't think plugging a device made for 120V into a 240V source might be bad for it?

[PeterSt]

If there are active devices in there, sure. But I didn't look at it like that.

[mansr]

5 minutes ago, PeterSt said:

If there are active devices in there, sure. But I didn't look at it like that.

It's not the power strip I'm worried about, it's whatever equipment someone might plug into it.

[Ralf11]

Just for fun, it won't hurt to swap the leads around

 

How much does PS want for their audiophile power strips BTW?

 

- must be a lot since they double the voltage, so must double the SQ...

[One and a half]

What a bizarre set of photos.

Equipment does have ratings labelled for good reason, even car tyres have a maximum pressure rating. Inflating a tyre to double its maximum will have predictable results, same with these outlets, and the cable/connectors.

[STC]

9 hours ago, mansr said:

So what's in the picture? Are those devices connected to UK 240V mains?

You know the plug is not suitable for 240V but...... users including engineers. 

[mansr]

19 minutes ago, STC said:

You know the plug is not suitable for 240V but...... users including engineers. 

These particular sockets might be rated for 250 V, but it's still reckless to put double the expected voltage on a standard connector.

[STC]

9 minutes ago, mansr said:

These particular sockets might be rated for 250 V, but it's still reckless to put double the expected voltage on a standard connector.

You are going to offend many distributors and audiophiles over here. 😂 

[mansr]

47 minutes ago, STC said:

You are going to offend many distributors and audiophiles over here. 😂 

Don't worry. I'm used to it.

[Tecnik1]

Has an American expat living in Viet Nam the last 8 years and southeast asia for over 20 years many se asian countries are 220-230v with US style plugs on 220-230v equipment and their is no issues. Perhaps the OP lives in a 240v country and obviously the strips are 240v versions.

 

Most manufacturers offer US style plugs on 220-240v equipment. People should stop thinking the US way is the only way.

[sandyk]

48 minutes ago, Tecnik1 said:

Has an American expat living in Viet Nam the last 8 years and southeast asia for over 20 years many se asian countries are 220-230v with US style plugs on 220-230v equipment and their is no issues. Perhaps the OP lives in a 240v country and obviously the strips are 240v versions.

 

Most manufacturers offer US style plugs on 220-240v equipment. People should stop thinking the US way is the only way.

 Many countries , including Australia)  are now 230VAC nominal, which translates to a 253V AC maximum (10% tolerance)

[mansr]

7 hours ago, sandyk said:

 Many countries , including Australia)  are now 230VAC nominal, which translates to a 253V AC maximum (10% tolerance)

Don't your plugs have angled pins?

[sandyk]

8 minutes ago, mansr said:

Don't your plugs have angled pins?

 

Yes they do. USA  style plugs and sockets would not be legally permissible with our standards in Australia