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Old 21st February 2012, 01:50 PM   #1
moppy is offline moppy  Malaysia
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Default Which DIY amp?

I found this transformer (0120P1-2-025 Nuvotem | Toroidal transformer,120VA 2x25V o/p | 223-8049 | Welcome to RS Online) at my working place. Any DIY amp project suitable for this transformer?
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Old 21st February 2012, 02:09 PM   #2
mikje is offline mikje  United States
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The LM3875 amp is very well regarded. You can find kits at Audiosector.com DIY Chip Amplifier Kits, PCB's, Components and Information.

or you can build a simplified version off the spec sheet. LM3875 - High-Performance 56W Audio Power Amplifier

Here's a link to a thread about the LM3875 First LM3875 impressions

The nice thing about the Audiosector amp is that the kit comes with a power supply board; all you'll need to add is the transformer, RCA input jacks, speaker terminals, a power switch, and a volume control (if you're so inclined). It's a great sounding small amp. Finding a center tapped transformer of appropriate voltage is a good thing; that's often one of the more costly parts of an amp build.
Mike
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Last edited by mikje; 21st February 2012 at 02:12 PM.
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Old 21st February 2012, 02:12 PM   #3
moppy is offline moppy  Malaysia
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Thank you so much Mijke
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Old 21st February 2012, 03:17 PM   #4
ptempel is offline ptempel  United States
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You have a few options:

- MyRefC
MyRefC build guide

- DX Blame MKIII
Dx Blame MKIII-Hx - Builder's thread

- NAP-140 clone
NAP-140 Clone Amp Kit on Ebay

- Tripath TA2022 amp
Medium power ampes based on TA2022, typically 2x50W

- Symasym
TO-3 SYMASYM

In addition to the Gainclone mentioned above. If its your first amp, then the Gainclone seems to be the easiest build.

Last edited by ptempel; 21st February 2012 at 03:42 PM.
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Old 22nd February 2012, 02:01 AM   #5
moppy is offline moppy  Malaysia
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Quote:
Originally Posted by ptempel View Post
You have a few options:

- MyRefC
MyRefC build guide

- DX Blame MKIII
Dx Blame MKIII-Hx - Builder's thread

- NAP-140 clone
NAP-140 Clone Amp Kit on Ebay

- Tripath TA2022 amp
Medium power ampes based on TA2022, typically 2x50W

- Symasym
TO-3 SYMASYM

In addition to the Gainclone mentioned above. If its your first amp, then the Gainclone seems to be the easiest build.
I will go thru it, thanks so much.
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