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Old 25th January 2011, 01:44 PM   #911
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Quote:
Originally Posted by Zen Mod View Post
which input you'll use - that's your choice , but be sure that unused one is grounded .

what you wrote is normal behavior of all Aleph amps - nothing to worry about
I would like to ask you one more question.
Can i use (it doesin't matter in which input) 1k resistor instead of 22k, that the input gain woud be more sensitive.

Thank you
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Old 25th January 2011, 03:46 PM   #912
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gain is set with ratio of 220K/22K

replacing 22K with 1K sounds like trouble for me .............. asking more gain from circuit than circuit even have OLG

how much more gain you need ?

anything above 15x (23.5db) is already letting steam out ........... taking in account output impedance and few other things
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Old 25th January 2011, 04:39 PM   #913
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Quote:
Originally Posted by Zen Mod View Post
gain is set with ratio of 220K/22K

replacing 22K with 1K sounds like trouble for me .............. asking more gain from circuit than circuit even have OLG

how much more gain you need ?

anything above 15x (23.5db) is already letting steam out ........... taking in account output impedance and few other things
I did like you said, and now output voltage is like it shoud be, everything is just fine. So thank you for your time for me and advises.

Good luck!
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Old 25th January 2011, 04:45 PM   #914
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Originally Posted by mancubus View Post
I did like you said, and now output voltage is like it shoud be, everything is just fine. So thank you for your time for me and advises.

Good luck!


I'm glad to hear that ;

but - you didn't answer to this :

Quote:
Originally Posted by Zen Mod View Post
.....
how much more gain you need ?

...
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Old 25th January 2011, 05:14 PM   #915
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I'm glad to hear that ;

but - you didn't answer to this :
It was just a thought. There is enough
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Old 25th January 2011, 05:43 PM   #916
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Old 25th January 2011, 06:30 PM   #917
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I would like also to thank Zen Mod

great guy
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Old 25th January 2011, 06:56 PM   #918
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Originally Posted by samoloko View Post
I would like also to thank Zen Mod

great guy


nope ;

he's dumb , lazy and mean ;

he's just acting nicely in public ..... sometimes

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Old 30th January 2011, 01:39 AM   #919
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One thing I've wondered about that i now want to ask you experts:

If you halved the output power of the Aleph J by removing one mosfet pair, would the distortion at 1w/10w increase, decrease or be roughly the same? (halving bias to adjust for halv mosfets)

Why I wonder is because I probably won't need more than 1-10w and thus wonder if I could halve power output without disadvantages or if it's better to keep the amp at 20-25w.
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Old 30th January 2011, 10:41 PM   #920
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Sure, you can do that without penalty. There's a couple other things, lower the rail voltage some, and eliminate 2 sense resistors also if you use just one pair of fets.
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