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Search: Posts Made By: crmaris
Forum: PC Power Supply Discussion 1 Week Ago
Replies: 24
Views: 626
Posted By crmaris
Hold-up time is ok in this unit. I used my new...

Hold-up time is ok in this unit. I used my new methodology in this review (however the old scope since my new Keysight scope hadn't arrived at the time of this review). The price is 90$. It is shown...
Forum: PC Power Supply Discussion 2 Weeks Ago
Replies: 20
Views: 619
Posted By crmaris
indeed the PSU break apart and the whole process...

indeed the PSU break apart and the whole process takes a serious time to do it. I wish I could skip that part :(

But for me no review (not only PSUs) is compete without breaking apart the sample...
Forum: PC Power Supply Discussion 2 Weeks Ago
Replies: 12
Views: 597
Posted By crmaris
I guess the diode is biased accordingly after...

I guess the diode is biased accordingly after power is applied to the PSU in order to short out the thermistor and bypass it, since the current chooses the path with lower impedance. Now since I...
Forum: PC Power Supply Discussion 4 Weeks Ago
Replies: 46
Views: 2,982
Posted By crmaris
It is FSP and ACRF. Unfortunately I didn't have...

It is FSP and ACRF. Unfortunately I didn't have the time to crack it open to check on the secondary side since I had to run for another meeting.
Forum: PC Power Supply Discussion 12-30-2015
Replies: 16
Views: 506
Posted By crmaris
hm then I should visit their booth at CES. Thanks...

hm then I should visit their booth at CES. Thanks for the heads up on this!
Forum: PC Power Supply Discussion 12-26-2015
Replies: 14
Views: 558
Posted By crmaris
ok you win. I will state in the future (given...

ok you win. I will state in the future (given that I remember it of course since I tend to forget lately ha ha) that these are just good quality caps when compared to flagship Chemi-Con ones. When...
Forum: PC Power Supply Discussion 12-26-2015
Replies: 14
Views: 558
Posted By crmaris
Most of the PSUs I have encountered so far don't...

Most of the PSUs I have encountered so far don't use higher than KZE caps in the secondary. In most cases the best combination I see is KZE along with KY.

Also please check on the example I...
Forum: PC Power Supply Discussion 12-26-2015
Replies: 14
Views: 558
Posted By crmaris
Nope they have 5k lifetime since they have 12.5...

Nope they have 5k lifetime since they have 12.5 Φ. My bad here since I just woke and it is 6 am. here. Will reply to the rest of your queries now.
Forum: PC Power Supply Discussion 12-26-2015
Replies: 14
Views: 558
Posted By crmaris
To provide an example. Let's say that the...

To provide an example. Let's say that the secondary caps operate with 80C ambient (which is way higher than the normal one even when the PSU works at really hard conditions) and add another 5C...
Forum: PC Power Supply Discussion 12-26-2015
Replies: 14
Views: 558
Posted By crmaris
@Stefan. I don't belong to the reviewers'...

@Stefan. I don't belong to the reviewers' category that just states something without supporting it. The 5K hour lifetime is quite long and if you use the type that I list in my PSU 101 article you...
Forum: PC Power Supply Discussion 12-21-2015
Replies: 8
Views: 639
Posted By crmaris
the main switchers are on plain sight but they...

the main switchers are on plain sight but they don't look like the plain FETs.
Forum: PC Power Supply Discussion 12-19-2015
Replies: 12
Views: 496
Posted By crmaris
mine is not working any more (died during the...

mine is not working any more (died during the break apart process), else I would have tested it. Asked for a second sample but they told me that they cannot send one.
Forum: PC Power Supply Discussion 12-16-2015
Replies: 6
Views: 378
Posted By crmaris
it is a tad lower and I believe that the fully...

it is a tad lower and I believe that the fully modular cables play a part in this, mostly at higher loads.
Forum: PC Power Supply Discussion 12-13-2015
Replies: 28
Views: 1,184
Posted By crmaris
The PG signal must drop while the voltages are...

The PG signal must drop while the voltages are within spec. This is why ATX says >=16ms for the PG signal and >=17ms for the voltages.

also besides monitoring the voltages you have to measure...
Forum: PC Power Supply Discussion 12-11-2015
Replies: 28
Views: 1,184
Posted By crmaris
I won't even bother to reply as far as I am...

I won't even bother to reply as far as I am concerned in your post. I was writing a pretty long post but I believe that it doesn't worth the trouble. I only feel sorry because I helped you a couple...
Forum: PC Power Supply Discussion 12-11-2015
Replies: 17
Views: 599
Posted By crmaris
nope it wasn't among the known brands. I think...

nope it wasn't among the known brands. I think Wolf has one of them.
Forum: PC Power Supply Discussion 12-10-2015
Replies: 28
Views: 1,184
Posted By crmaris
I suspected these units because with such low...

I suspected these units because with such low capacity caps still they had over 20 ms hold-up. There might be some other units out there doing the same but in any case NOT in this degree. Else I...
Forum: PC Power Supply Discussion 12-10-2015
Replies: 28
Views: 1,184
Posted By crmaris
Sirfa's Hold-up time tricks

Recently I tested two PSUs from Sirfa (HPM platform) which although had pretty small bulk caps for their capacity, still the hold-up time was among the highest that I have ever measured. I should...
Forum: PC Power Supply Discussion 12-10-2015
Replies: 17
Views: 599
Posted By crmaris
Have quite some time to talk to him. As for...

Have quite some time to talk to him.

As for equipment we all started low. I had to build by first load tester and put so much hard work on it. But I loved everything about it since it was my baby...
Forum: PC Power Supply Discussion 12-10-2015
Replies: 17
Views: 599
Posted By crmaris
will record from about half a meter away. Don't...

will record from about half a meter away. Don't want to put it too close to my sound analyzer because it might alter the readings.
Forum: PC Power Supply Discussion 12-09-2015
Replies: 17
Views: 599
Posted By crmaris
It isn't an expensive one but according to user...

It isn't an expensive one but according to user opinions it is really good. I am not sure though if it will do a good job in this usage scenario, however I only want to provide a feeling of the...
Forum: PC Power Supply Discussion 12-09-2015
Replies: 17
Views: 599
Posted By crmaris
Yeap I talk with Milan. He was away for a period...

Yeap I talk with Milan. He was away for a period though.

To get a good soundmeter for below 30 dBA readings and with average function (which is essential) you need to spend more than 2k euros....
Forum: PC Power Supply Discussion 12-09-2015
Replies: 17
Views: 599
Posted By crmaris
it is but the difference is very small. In...

it is but the difference is very small. In general though the VSM units perform better.
Forum: PC Power Supply Discussion 12-08-2015
Replies: 19
Views: 903
Posted By crmaris
the fan is indeed FDB (had to sacrifice the fan...

the fan is indeed FDB (had to sacrifice the fan of my sample to find out)

And the +12V fets aren't on the CT board but at the solder side of the mainboard. They don't look like regular fets though...
Forum: PC Power Supply Discussion 12-08-2015
Replies: 17
Views: 599
Posted By crmaris
I measure of course noise at low temps because of...

I measure of course noise at low temps because of the crossload tests and the results are shown at the relevant crossload graph.

I ordered recently a good microphone with which I intend to...
Showing results 1 to 25 of 500

 
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