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Old 27th July 2006, 10:51 PM   #1
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Default Problem with aleph p 1.7

Somebody with carried out the aleph p 1.7 of veteran? Did you have problems after the assembly?
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Old 28th July 2006, 02:36 PM   #2
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Non - mon Aleph P 1.7 a fonctione la premiere fois. Je suggere de
commencer verifier la CCS et la DC voltages.

Aussi par verifier 3 fois encore le PCB et les pieces !!!!!
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Old 29th July 2006, 10:35 PM   #3
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I wayne 325,
Thank you for your answer, this weekend, I will check the voltage on the psu and the assembly. I will give you my result.
With soon.
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Old 6th August 2006, 09:59 PM   #4
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Now it functions, but I have another problem on a way, I have a strange noise, and with the osiloscope it appears an unhooking, I changed all the condensers, the irf 610 and the irf 9610 and the noise is always there. Here is a copy of the signal
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Old 6th August 2006, 09:59 PM   #5
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another picture.
Mrs Nelson Pass have you got a idea ?
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Old 7th August 2006, 06:01 AM   #6
zei is offline zei  Sweden
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what kind of noise? Can do describe it?

/Z
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Old 7th August 2006, 10:10 AM   #7
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I zei,
it's a kind of spitting or whisper on certain frequency. Firstable i think it's irf 610 or irf 9610 generate noise, but after change i have the same noise. I change one by one the 10f and the 680p and ztx 450 and ztx 550 but nothing change. I verify the ground but it's good.I don't know any more what to make, because the other way functions very well .
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Old 2nd September 2006, 05:50 PM   #8
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My problems are caused by oscillations. Nelson Pass suggest to add a 221 ohm resistor on the output side in one of the diyaudio thread, but without result. It's necessary to add a condenser between 10pf and 400pf, to make test to see whether the band-width does not decrease.

Now the sound is formidable, much of depth, more details, my blocks quad as never as well functioned.

I continue my investigations and the pictures will follow.
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