My Dream Aleph 2 Coming True - Page 34

karajak · 16th April 2012, 09:00 AM

When I first checked my amp for a few seconds I measured normal dc ofset(20mV).Then ,disaster! dc at speaker terminals,blown 1ohm resistors on constant current pcb .After turning of I checked everything .Found several irfp 240 fried.I finished the second channel with extreme acuracy in respect to follow instructions.I turned it on using light bulbs for protection.the bulbs indicated false. I guess variac is a choice in order to take measurements.

sakellogg · 16th April 2012, 12:07 PM

Quote:

Originally Posted by karajak

This dialoge is very useful to me!I face the same problem .In search for a variac....Wait for findings...Keep on trying...

Are you using the same boards? Is it the same trouble? Same amp?

nrg2009 · 16th April 2012, 12:25 PM

Yes, it look like Karajak is using the exact same boards.

Karajak, what enclosure are you using? It seems very nice and spacious.

sakellogg · 16th April 2012, 12:31 PM

Crap, I didn't see your second post. It is the same boards.how long before you had dc on your speaker posts?
And don't get bummed out you both will get it.
And by the end you will know how it works.

karajak · 17th April 2012, 11:36 AM

I am using the same KK boards .It was about 20 seconds when dc apeard at spkr terminals. The case is based on FISHER heatshinks.I bought them a few years ago.EXPENSIVE! I could afford them back then.
Its my first project with these boards.Previous attempts with finiss boards were an absolut sucess story.I am deeply dissapointed.

AudioSan · 17th April 2012, 11:49 AM

don't blame the boards. there is no problem with them. i have aleph2 with the same boards myself. and there was never any problems.

karajak · 17th April 2012, 12:01 PM

Misunderstanding! I do not blame the boards.I followed pcb instructions and each component was measured before mounted.Iam dissapointed because i canot figure out what is wrong...

nrg2009 · 17th April 2012, 04:13 PM

Karajak, we will figure it out, no worries. My wife and I are planning a vacation to Greece, I am certain by that time you will have your aleph2's working by then. Just hang in there with me!
I ordered a variac, hopefully it will be here before the weekend, maybe later.

sakellogg · 17th April 2012, 04:29 PM

Oh yah you guys will get it. I've got some ideas just waiting for the var.

karajak · 18th April 2012, 03:46 PM

Hi guys!Today I received my new variac.Any sugestions?NRG 2009
It would be a pleasure for me to welcome you and your wife in Greece!

16th April 2012, 12:31 PM	#334
sakellogg diyAudio Member Join Date: Nov 2008 Location: dixon ill	Crap, I didn't see your second post. It is the same boards.how long before you had dc on your speaker posts? And don't get bummed out you both will get it. And by the end you will know how it works. __________________ I'm not crazy, my mother had me tested

17th April 2012, 11:49 AM	#336
AudioSan diyAudio Member Join Date: Feb 2009 Location: Trondheim	don't blame the boards. there is no problem with them. i have aleph2 with the same boards myself. and there was never any problems. __________________ aleph P1.7 pre. F5 power amp. CDpro2(need DAC). Vivaldi8 speakers

17th April 2012, 04:29 PM	#339
sakellogg diyAudio Member Join Date: Nov 2008 Location: dixon ill	Oh yah you guys will get it. I've got some ideas just waiting for the var. __________________ I'm not crazy, my mother had me tested

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16th April 2012, 12:25 PM	#333
nrg2009 diyAudio Member Join Date: Apr 2009 Location: Detroit, born and raised in the netherlands.	Yes, it look like Karajak is using the exact same boards. Karajak, what enclosure are you using? It seems very nice and spacious.

17th April 2012, 12:01 PM	#337
karajak diyAudio Member Join Date: Jan 2008 Location: ATHENS	Misunderstanding! I do not blame the boards.I followed pcb instructions and each component was measured before mounted.Iam dissapointed because i canot figure out what is wrong...

17th April 2012, 04:13 PM	#338
nrg2009 diyAudio Member Join Date: Apr 2009 Location: Detroit, born and raised in the netherlands.	Karajak, we will figure it out, no worries. My wife and I are planning a vacation to Greece, I am certain by that time you will have your aleph2's working by then. Just hang in there with me! I ordered a variac, hopefully it will be here before the weekend, maybe later.

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