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Old 25th January 2009, 10:50 PM   #61
Helmuth is offline Helmuth  Netherlands
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Quote:
Good evening gentlemen, The build is complete. We've been listening to the amps tonight and they sound just great. Here is a picture of the set now complemented with a pair of heavyweights. Note the Aleph Ono (the blue glow) on the right ready to go
Very nice Bouke,

Where are you listening to magneto-static speakers or electrostatic speakers.

Regards, Helmuth
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Old 26th January 2009, 06:47 AM   #62
steenoe is offline steenoe  Denmark
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Default Re: The Result

Quote:
Originally posted by Bakmeel
Good evening gentlemen,

The build is complete. We've been listening to the amps tonight and they sound just great.

Here is a picture of the set now complemented with a pair of heavyweights. Note the Aleph Ono (the blue glow) on the right ready to go

Great job. Congratulations....
Is that Audiostatic's?

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Old 26th January 2009, 07:37 AM   #63
Merijn is offline Merijn  Netherlands
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Hmmm, I could have been more awake now...

Feels like Steenoe was right after all. Even without alcohol for me I'm just a little less sharp than I would have been...
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Old 26th January 2009, 08:03 AM   #64
Bakmeel is offline Bakmeel  Netherlands
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Morning!!

I wasn't able to get up this morning either... Let alone to leave my amps at home and come to work. I guess taking them with me on the bike wasn't an option...

Speakers ar Piega P5 LTD, and they are ribbons. At least, both high and mids are ribbon, low is cone-speakers in d'appolito bass reflex.

It's amazingly clear and powerful, and the bass is very tight. Playing Kodo (japanese drums) was a real pleasure heheh... I guess I have to re-listen all my music now...
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Old 26th January 2009, 08:27 AM   #65
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Thumbs up .......

...........Absolute madness............................

Long live DIY
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Old 26th January 2009, 01:39 PM   #66
bees is offline bees  Netherlands
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Hiya!

In front of all these people I promise to mail your cables today or tomorrow.
I'm realy, realy , realy sorry for the delay.
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Old 26th January 2009, 03:28 PM   #67
Bakmeel is offline Bakmeel  Netherlands
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LOL!!

That's all right Bees, I was calling goods inwards today to check if they had received anything yet... I't's clear now they haven't hahaha

No hard feelings... Do send your return address along. I have something here for you I want to mail back.
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Old 26th January 2009, 03:34 PM   #68
bees is offline bees  Netherlands
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Quote:
Originally posted by Bakmeel
LOL!!

That's all right Bees, I was calling goods inwards today to check if they had received anything yet... I't's clear now they haven't hahaha

No hard feelings... Do send your return address along. I have something here for you I want to mail back.
I don't know but it's probably cheaper to go and fetch those amps myself. 88Kg's excl, package material is a bit expensive to send with ups/tnt/dpd. ;-)
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Old 26th January 2009, 09:25 PM   #69
Bakmeel is offline Bakmeel  Netherlands
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Unhappy Not so Aleph

It's too bad gentlemen, the joy was short-lived...

Amplifier number 2, has failed. There was a pop, some hissing noise, after which I decided to switch off and unplug the speakers.

I've tried to measure out a bit to find the failure, but I haven't detected the source of the problem yet. I have excluded however the power supply and the main amplification stage. I suspect the problem is in the Front End PCB... probably one of the differential pair mosfets.

I have unmounted the Front End PCB, and I will take it to work tomorrow where I have better equipment to find and fix the bug. To be continued...

The good news is that my speakers are unharmed. I think I have been extraordinarily lucky that the failure didn't cause a large DC voltage on the output... ... My speakers are virtually unreplaceable to me and I almost would like to kick my own #ss because I did not test these amps more rigorously. Obviously, since this was the second in the build, I took less time to test everything and to allow a safe break-in period... Would have been safer that way.

Anyway, this thread isn't finished yet... stay tuned!
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Old 26th January 2009, 10:17 PM   #70
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**** happens, but luckily no harm done to your Piega's

Good luck with finding the problem.

Did you ever consider a DC protection scheme?

Edit, I see some words are being censored here. Maybe I shall use a Dutch frase instead.
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