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 on: October 02, 2015, 10:51:07 am 
Started by acg - Last post by manisandher
Anyway ... here's a visualisation of my rabbit hole.

My Teradak ATX 400 (with a 275W output) has a 400W R-core transformer and not a toroidal. Interestingly, my old Pacific Microsonics Model Two PSU also used three large R-core transformers and not toroidals. Is there an advantage in using R-cores over toroidals?


 on: October 02, 2015, 10:45:57 am 
Started by manisandher - Last post by manisandher
Hi Peter, thanks for this.

I did take a quick look at Performance in Task Manager when the PC first started switching off, but couldn't see anything untoward. But there's obviously something not right at my end, with such high heat sink temperatures. I'm going to reduce the speed in the BIOS and also take a look at temperature readings in general (CPU, etc) whilst I'm in the BIOS. (Will need to reinstall my GPU card to do this - PITA.)

Thanks again.


 on: October 02, 2015, 09:33:21 am 
Started by acg - Last post by acg
Would be nice to shorten/eliminate those dc cables or provide a second round of regulation at the motherboard just to see what happens.

 on: October 01, 2015, 09:05:44 pm 
Started by acg - Last post by PeterSt
Anyway ... here's a visualisation of my rabbit hole.

Still going (very) strong. And no rabbits in there. No rats either.

Btw, the power cord seems to cross the (turqoise) interlink; in reality this is not so (it's at 30cm distance).

 on: October 01, 2015, 11:22:11 am 
Started by acg - Last post by acg
Thanks for the reports Peter.  Have we found a new rabbit hole to go down?  There are several ways to build a good power supply and some guys are doing some interesting stuff over here with choke filtered unregulated supplies such as you would see in a valve amp.

 on: October 01, 2015, 08:57:19 am 
Started by manisandher - Last post by PeterSt

I have a Teradak ATX 350 running for 3 continuous days now, and the heatsinks are 30 Celcius. I did not measure, but noticed that when the sun is shining on the unit, it gets some warmer (estimate : 40C). Ambient is just over 20C.
During playback nothing changes but if anything it gets cooler (this is no surprise to me).

Keep in mind that my processor runs at 430MHz and that this sure can matter. When idle, this 430MHz is to be compared with 1200MHz in normal circumstances (when you never changed the processor speed in the BIOS). Do notice that when Playback is going on, this is to be regarded as "Idle" (nothing will trottle-up because of it).

What can have happened in your situation is that something got in a loop during your not being present and that one of the processor cores went to 100% - even in turbo mode. Now that core runs at 3800MHz continuously, which your cooling system may be capable of (to keep all sufficiently cool) but which draws the (thermal) 135W of the processor continuously. And *that* will make the PSU hot for (quite) sure.

If you, next time, see the PSU so hot, try to observe TaskManager - Performance Tab and see whether one of the cores is at 100% (this shows as 8.33% with 12 cores ( 100 / 8 )).


 on: October 01, 2015, 08:29:17 am 
Started by PeterSt - Last post by PeterSt
Hi there all,

At the Show last weekend I sneaked in a Black Sabbath and one of the auditioners asked me whether I had something of Kadavar.
Ehh, Kada-what ?
I never heard of it and because we didn't have a (fast) wired internet connection I also could not acess Tidal for it, thus, bad luck.

I was told that Kadavar plays like Black Sabbath. Well, now *that* seemed quite impossible to me, but of course I was intrigued. So yesterday I obtained an album from Tidal ("Berlin") and my visitor appeared to be right. Now that is strange ...

The (3 German) guys must have explicitly bought the same electric guitar and the singer must have borrowed the voice from Ozzi Osborne, and next ...

If you listen through the album, the only thing you notice is that Kadavar seems unable to create the variation in each song like Black Sabbath always does it. But hey, no other band that I know does that / can do that.
Otherwise it is very (very) strange that this Black Sabbath sound plays on and on without being disturbed. It is a sort of background music.
I know, impossible, but I still judge it like that.


 on: October 01, 2015, 08:13:34 am 
Started by acg - Last post by PeterSt
So ...

Yesterday has been one of the best nights of playback ever.
It is my conclusion that the LPSU must matter, although I can't really pinpoint it.

I could say that the slight flavour which is in Windows 10 (it is grey-ish) now is not there. It is more snappy - sort of towards Windows 8. Meanwhile the music(ians) kept playing.

Actually it was so that in all of the ~4 hours I never really noticed anything. Nothing jumped out. Nothing disturbed. I didn't want to shut off any album either, meaning that I played a few (in full) only. So my test repertoire wasn't that large this time.

So ...


 on: September 30, 2015, 12:27:39 pm 
Started by acg - Last post by PeterSt
Hi Alain,

All correct. But :

And are you saying that the Teradak does not have sufficient reserve power to face sudden demands ?

This shouldn't read as a law or something. I just seek an explanation for a sound which seems to be worse and the logic of an audiophile tells that if capacitors are too small, the sound will be tinny. BUT :
How on earth this makes sense for a computer ... you tell me.

I didn't expect much of a difference anyway but at least with the PSU not connected to mains earth the difference is "abnormal" compared to the switcher in the same situation. Totally failed, I'd say.
Whether things are (really) normalized with the PSU connected to mains earth, I'll have to see about that tonight.


 on: September 30, 2015, 12:13:25 pm 
Started by acg - Last post by AlainGr
Hi Peter,

I am confused by your post... The comparison you make between win 8 is that you find Win 8 more accurate, while Win 10 is more musical ?

And are you saying that the Teradak does not have sufficient reserve power to face sudden demands ?



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