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Aleph-X diff pair trouble?
Aleph-X diff pair trouble?
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Old 28th July 2012, 01:15 PM   #1
jeekee is offline jeekee
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Join Date: Jun 2012
Default Aleph-X diff pair trouble?

Hi all,

I've build an Aleph-X and am having some trouble with one side (using rev. 1.0 board, low power Grey's design, options: D1a, J1a, jumper on Q12a, r48 and r49). The voltage over r25 seems ok (around 4V) while over r23 its over 6V. I've already changed the diff pair but to no avail. Also I noticed that R1-4 and R42-45 are heating up excessively.

Any ideas what could be the problem here?

Kind regards.
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Old 28th July 2012, 02:24 PM   #2
Zen Mod is offline Zen Mod  Serbia
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Aleph-X diff pair trouble?
some of us aren't so informed about exact pcbs and schm version

fill that blanks (schm , pcb graphic info , pics of your exact work) here and maybe someone will be able to help
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Old 30th July 2012, 05:19 PM   #3
jeekee is offline jeekee
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Late night build and post is a recipe for disaster. I've checked wiring 20 or so times and final it bit me in the ***, swapped the gate and source of one of the output MOSFET's... fixed it and voila: SOUND

Thanks for the post anyways!
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