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DIY amps
http://www.dcaudiodiy.com/phpBB3/viewtopic.php?f=5&t=474		 Page 1 of 1
Author:  JDCrae [ July 16th, 2014, 9:08 pm ]
Post subject:  DIY amps
Does anyone have any experience with eBay amps ? I've seen some kits requiring soldering and caps that can be had for 65.00 and allegedly put out 100 wpc. Too good to be true ?

Have seen some DIY tube amps too but the power output seems very very low.

Open to all thoughts and insights.

Jeff
Author:  cport [ July 16th, 2014, 10:59 pm ]
Post subject:  Re: DIY amps
Hi Jeff:

These >LM3886< amps are legit

(this photo won't last long, or the link above ... ...) 2x ~50watts for ~$40.00 (plus $30.00 for trafo)

Image
Author:  JDCrae [ July 17th, 2014, 6:01 pm ]
Post subject:  Re: DIY amps
If I were to go this route - using this board as the example, what else would be needed to make it a functional amp? Anything cheap that would be best to upgrade? These remind me of that radio shack radio kit I put together as a kid. Problem is mine never worked lol





cport wrote:
Hi Jeff:

These >LM3886< amps are legit

(this photo won't last long, or the link above ... ...) 2x ~50watts for ~$40.00 (plus $30.00 for trafo)

Image
Author:  cport [ July 17th, 2014, 6:58 pm ]
Post subject:  Re: DIY amps
You would need the following (assuming four channels -- 2x KITS):

1.) 2x transformers 220VA-330VA with dual secondaries producing between 18VAC and 25VAC
2.) 2x Power cords
3.) Chassis with Ground (if w/kids) or "whatever" if not
4.) Hookup wire
5.) Speaker wire (if you don't have any)
6.) RCA phono connectors
7.) Solder "barrier-strip" or phenolic terminal pad ( AC mains to trafo)
8.) AL Heat sinks w/ heat sink grease. (a perforated AL 'slab' serves)

These are prebuilt and tested -- you have no soldering to do on the boards -- just hookup.

Or you could break down and get one of these -- UPA-500

\\Charles
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