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Chip Amps Amplifiers based on integrated circuits

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Old 5th June 2003, 03:44 AM   #11
elizard is offline elizard  Canada
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ok .. well nevermind then!!!

the gainclone works fine!!!

i used a direct connection from my computer (audio out) to the GC .. works perfect

so .. here's the problem .. my pre-amp!
one more thing to troubleshoot .. but at least the GC's work
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Old 5th June 2003, 04:00 AM   #12
elizard is offline elizard  Canada
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*hangs head in shame*

ok .. i've been up since 6am this morning, so i have an excuse ... MAYBE!

the GC works PERFECT
the pre-amp works just as good

so .. what the problem was you ask?

the pre-amp had one cable hooked up to its outputs .. the gc had a different cable for inputs
for the life of me i couldn't figure it out .. until tried to switch cables and realized one end of the cable that goes out of pre-amp is unplugged, and one end of cable that goes into gc is unplugged ....
go figure .. heh ..

its true .. it IS all about the smallest things!!!
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Old 5th June 2003, 04:18 AM   #13
elizard is offline elizard  Canada
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ok, and now i'm talkin to myself (for now), but that's ok

as james brown would say "I feel good"

i heard my speakers play music after almost a whole month (short of a week) of downtime .. that's LOTS of time!!!

first impression (this is just ONE speaker btw, one channel completed) is that its incredibly dynamic ..
the music just seems to jump at me

my speakers are not great, but they're moderately sensitive, 91dB
the amp is virtually hum-free .. i can turn the volume up 100%, and put my ear up to the speaker and i can BARELY hear anything .. just BARELY

at 75% volume and less there's nothing that i can hear when i put my ear right up to the speaker .. just when its super high volumes

the heatsink should hold up, also .. i've had it playing for about 15 minutes at slightly below what my listening level usually will be (low volumes, plus its 11pm and everyone is asleep), and the heatsink is just warm .. i'll estimate 30C at very most, room temp about 22C

overall .. an amazing feeling to finish like this

one more to go

btw, thank you guys for making me stick ..
thank you peter for sending me free chips, i'm VERY grateful
and thank you all for great help

next up tomorrow - finish the second channel (SLOWLY!!!)

after that .. earn money .. and who knows, maybe an aleph 5
that's my next-on-the-list amp, although i'm not venturing into that one w/o saved up money, and LOTS of it ..
i could build an aleph 3 w/ the toroid/caps that i have .. or a P3A .. hmmmmmz ..
ok no ideas for me, and i'm goin to sleep now .. past 11 and gotta wake up at 6am!

(who can sleep with this much excitement!)
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Old 5th June 2003, 04:24 AM   #14
elizard is offline elizard  Canada
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oh yeah ..
and NO turn on/off thump whatsoever!!!
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Old 5th June 2003, 05:16 AM   #15
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That what I said in the beginning: if you have 28mV of DC, it means the amp is working
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Old 5th June 2003, 06:53 AM   #16
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Hi!

Quote:
Originally posted by elizard
*hangs head in shame*

so .. what the problem was you ask?

the pre-amp had one cable hooked up to its outputs .. the gc had a different cable for inputs
for the life of me i couldn't figure it out .. until tried to switch cables and realized one end of the cable that goes out of pre-amp is unplugged, and one end of cable that goes into gc is unplugged ....
go figure .. heh ..

its true .. it IS all about the smallest things!!!
Reminds me of myself trying to get a network of two computers working back about five years ago (and computers are what I do for a living...), the second computer belonging to a friend of mine, we had everything up and running, but no data could be send over the network. After checking and re-checking, we both installed the OS THREE TIMES from scratch, still no connection.

Then I realized that I hadn't plugged the network cable into the back of my computer... it was lying unused on the carpet...

My friend nearly killed me...

Bye,

Arndt
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Old 5th June 2003, 07:19 AM   #17
moamps is offline moamps  Croatia
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Quote:
Originally posted by elizard
overall .. an amazing feeling to finish like this
(who can sleep with this much excitement!)

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Old 5th June 2003, 08:21 AM   #18
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Well done mate, I'm glad you finally cracked it!
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Old 5th June 2003, 10:38 AM   #19
Variac is offline Variac  United States
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Boy aren't these DIY Audio guys who helped
THE BEST!!!!!!!
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Old 6th June 2003, 01:13 AM   #20
elizard is offline elizard  Canada
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well boys and girls
i've just finished second channel of the gainclone, and voila .. it works!!!

hooked it up and all .. works

then i cleaned up my room .. my parents were getting fed up with everything lying around, but meh

THANK you once again .. i'll make sure to stick around

oh yeah, and i can't wait till i start a new project, although my wallet seems to disagree VERY much so
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