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Chip Amps Amplifiers based on integrated circuits

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Old 28th May 2007, 03:10 PM   #401
Nordic is offline Nordic  South Africa
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Nice build, and I'm sure worth the money... throw a couple of spare chips in there and your grandchildren may still use that amp someday...
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Old 28th May 2007, 11:20 PM   #402
ak645 is offline ak645  United States
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Quote:
Originally posted by Nordic
Nice build, and I'm sure worth the money... throw a couple of spare chips in there and your grandchildren may still use that amp someday...

Hi Nordic,

Thank You for the kind words!

A bit about my speakers as the Amplifier was designed and built specificly for Them.They are line arrays using six vifa xt woofers and six fountek ribbon tweeters in a sealed box.They are are rated at 96db effiency and use a conjugate circuit to achieve a very flat 8 ohm impedance.f3 is around 70hz and f10 around 40ish.All design credit to Rick Craig of Selah Audio.A speaker designing Genius!

Also a pair of 250wt-12" subwoofers from ACI.
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File Type: jpg line array towers[1].jpg (64.0 KB, 5426 views)
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Old 7th June 2007, 07:09 AM   #403
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Location: Dona paula, Goa
Default Chipamp in a Tri-amp

Here is a tri-amp i made for a friend. The mid uses LM4780.

Gajanan Phadte
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Old 22nd June 2007, 04:57 AM   #404
pinoy82 is offline pinoy82  United States
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Default Another Gainclone

My first DIY Gainclone, all resistors are Dale/Vishay, ELNA Cerafine caps, LM4562 & OP07 OPAMP. This amp sounds amazing great imaging, good detail & clarity on Mid & Highs.
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Old 22nd June 2007, 01:54 PM   #405
pinoy82 is offline pinoy82  United States
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Location: Virginia
Default Point Zero Front

My first DIY Gainclone photo

Specifications
Power Output: 4 ohms 50WRMS, 8 ohms 38WRMS
Bridge Power: 8 ohms 100WRMS
THD+Noise 0.012%
S/N Ratio: <-92dB below 1W, 8Hz-20kHz
Average DC Offset: <1mV (Tempco Compensated)
Frequency Response (-3dB points): 8-50kHz +/-0.1dB
Instantaneous DC Offset: 0.0009V
PCB: 4.2 x 3.0" Double sided, silkscreened
Heatsink: 2.38 x 4.56 x 0.9" Black Anodize 6061 Aluminum
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File Type: jpg ezamp.jpg (67.7 KB, 4782 views)
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Old 22nd June 2007, 01:57 PM   #406
pinoy82 is offline pinoy82  United States
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Default Point Zero Amp Back

Amp Back
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Old 22nd June 2007, 01:58 PM   #407
pinoy82 is offline pinoy82  United States
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Default Pointzero Power Supply

Power Supply
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Old 26th June 2007, 05:03 AM   #408
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Location: Beijing
Default Good !

Good Skills!
A vacuum tube amplifier style.
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Old 4th July 2007, 10:55 AM   #409
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Location: Sweden
Default First gain clone!

Actually finished this, my very first diy amp, quite some time ago ...

The wooden parts are all oak, made from scratch. The aluminum panels are designed with the front panel designer software from www.schaeffer-ag.de. Schaeffer also manufactured the panels (raw), had them anodized later by a local company here in Gothenburg. The top is a streched aluminum net bought at a local hardware store.

The amp itself is based on the LM3875 kit by Peter Daniel.

Here's an early pic of some of the enclosure parts:
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Old 4th July 2007, 10:57 AM   #410
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Default First gain clone!

The PSU being put together:
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