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Old 16th September 2014, 05:50 AM   #1
karloss is offline karloss  Slovakia
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Default aleph´s mini output resistors smoking

hello
I completed pcbs I bought on ebay, matched all components, everything controlled twice, but when I turn it on, output resistors 0,47ohm begin to smoke after few seconds. Till then it sounds really nice
Both modules behave equally, is there some common problem I overlooked?
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Old 16th September 2014, 06:25 AM   #2
karloss is offline karloss  Slovakia
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Default schematic

schematic
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Old 16th September 2014, 01:10 PM   #3
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Are the .47 power resistors the correct dissipation value?
Best to post clear pictures.
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Old 19th September 2014, 05:19 PM   #4
karloss is offline karloss  Slovakia
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I found out what I did wrong - I have installed bc550c wrong way, do you think it did some fatal changes to amplifier module?
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Old 19th September 2014, 06:07 PM   #5
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by karloss View Post
..... do you think it did some fatal changes to amplifier module?
if nothing else , at least those smoking resistors are for change

btw. you evidently didn't follow any usual amp setting procedure ....... so it would be nice if you search a little , how to put (any) Aleph amp in work .....
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Old 20th September 2014, 11:48 AM   #6
generg is offline generg  Germany
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Yes the Aleph Mini is a fine sounding device......!

I have a friend who likes to visit sellers of Klipsch speakers. He hears the big ones..... Cornwall etc. with the big amps most sellers like.
Then he asks if he is allowed to plug in Aleph mini .......
And then he likes to look how the jaw of the seller falls down hearing he Aleph mini!

Long live Nelson!


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Old 21st September 2014, 06:15 AM   #7
n3szd is offline n3szd  United States
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Hey, some people smoke, like me, just um, make sure you use it in the "smoking section" or outdoors Lol, glad you found the problem, sounds like a mismacth or too much current.
Rob
My aleph 1000 beats your daddys pioneer

Last edited by n3szd; 21st September 2014 at 06:15 AM. Reason: misspelled
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Old 21st September 2014, 06:53 PM   #8
karloss is offline karloss  Slovakia
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after proper placement of bc550c everything seems ok, amp has really nice sound. I thought diy chassis will thermally fit this amplifier, but it gets hardly to 35°C/95°F. It´s about 10kg of aluminium. Now I wonder what about putting aleph 3 inside
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