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23rd April 2004, 01:46 PM
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#1 |
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diyAudio Member
Join Date: Aug 2003
Location: Gauteng
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Whats Wrong with My Chips!
Yesterday I Made my first gainclone 2x_LM3886 & 2X_LM3875
after being solid state crazy for a very long time I must say I expected verry little from these little chips  but I was blown away by their sound qualityand output was lot more than what I expected  I build mine from the Decibel Dungeon Site for both Chips the problem on my is when I add the zobel network on my Lm3875 I get a loud buzz on the output  without it it is dead quiet! & When I try To add 100n decoupling caps to LM3886 I get a loud buzz on the output without them it is dead quiet! I cant understand why this happens as far as I understand they sould both be basically the same thing just one with more power! the lm3875 works fine with decoupling Caps the lm3886 works fine with Zobel Network! The big Question is Why? Thank U in Advance!
__________________
"When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute—and it’s longer than any hour. That’s relativity." - Albert E |
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28th April 2004, 07:01 AM
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#3 |
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diyAudio Member
Join Date: Aug 2003
Location: Gauteng
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Sorry for the delayed reply!
 10E 1watt resistor & 100nf Ceremic zobel network 100nf Ceremic for Decoupling Caps
__________________
"When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute—and it’s longer than any hour. That’s relativity." - Albert E |
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28th April 2004, 09:38 AM
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#5 |
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diyAudio Member
Join Date: Aug 2003
Location: Gauteng
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Ill Try & Change it Today & see if there is a Change
But shouldn't I always get a hum if I have grounging problems? Thanks Again!
__________________
"When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute—and it’s longer than any hour. That’s relativity." - Albert E |
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29th April 2004, 12:16 PM
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#6 |
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diyAudio Member
Join Date: Aug 2003
Location: Gauteng
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changed my grounding X4 still same problem!
I guess my lm3875 will have to do without Zobel Network! & my lm3886 will have to do without decoupling Caps But I Have to say I expected less from GainClones! Their Sound is Amazing! 
__________________
"When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute—and it’s longer than any hour. That’s relativity." - Albert E |
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