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Old 24th February 2009, 02:21 PM   #21
dano12 is offline dano12  United States
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Quote:
Originally posted by mosfets



That is the coolest piece of crXp I've ever seen on DIY! I want one just like it STAT.
I think I'll call it the "Pinnacle" or some other superlative and start selling them on ebay for 1000 bucks.
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Old 24th February 2009, 02:32 PM   #22
Salas is offline Salas  Greece
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Quote:
Originally posted by dano12
As far as I'm concerned, mission accomplished with this one. I fashioned a hillbilly heatsink for the power resistor, stuck a single transistor pre-amp in front of it, stuck it in a computer CDROM cage and called it a day.

Click the image to open in full size.

It makes a nice little guitar amp, drives an 8 ohm cab very well.

I think now I'll move on to some of the better suggestions posted here.

Thanks again for the pointers!
I like it aesthetically too. Very MECHANO! Must be sounding direct and ''warm''?
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Old 24th February 2009, 02:46 PM   #23
dano12 is offline dano12  United States
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FWIW, here is the corrected schematic that I ended up with:

Click the image to open in full size.
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Old 24th February 2009, 09:49 PM   #24
mosfets is offline mosfets  Canada
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Quote:
Originally posted by dano12
FWIW, here is the corrected schematic that I ended up with:
I think Dano is an artist.

Quote:
I like it aesthetically too. Very MECHANO! Must be sounding direct and ''warm''?
Perhaps like a movie prop? ...good times.
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Old 24th February 2009, 09:56 PM   #25
mosfets is offline mosfets  Canada
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Default Beavis

Just checked out the web site... now it all makes sense.

Cool.
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Old 24th February 2009, 10:58 PM   #26
djk is offline djk
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"FWIW, here is the corrected schematic that I ended up with:"

FWIW, it can't put out anywhere near the power claimed.
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Old 24th February 2009, 11:08 PM   #27
Bonsai is offline Bonsai  Taiwan
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it does look cool, i have to say.



Check out C3 though - its shorted out. I think you meant to put it across th e supply rails.
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Old 24th February 2009, 11:11 PM   #28
SQLGuy is offline SQLGuy  United States
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Quote:
Originally posted by dano12
FWIW, here is the corrected schematic that I ended up with:

Click the image to open in full size.
Out of curiosity, what's the purpose of the 470uF cap with both ends connected to ground?


EDIT: Ooops, dupe of Bonsai's post.
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Old 25th February 2009, 04:38 AM   #29
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Quote:
Originally posted by dano12
Click the image to open in full size.
Is 220 F for C2 a typo? That would give f-3dB at 90 Hz with an 8 Ohm load = no bass.
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Old 25th February 2009, 08:22 AM   #30
PMA is offline PMA  Europe
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An 50 ohm output impedance ...
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