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Got a new mega-t amp yesterday
http://diyaudioprojects.com/Forum/viewtopic.php?f=10&t=172
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Author:  billnchristy [ 23 Sep 2008, 16:13 ]
Post subject:  Got a new mega-t amp yesterday

My buddy rebuilds the Sure modules and makes them monsters.

Here is a pic of a stock one with the input caps removed and some naughty resistors removed and next to it is his model :eek:

I have not tried this one yet...I am building it for a customer.

Unfortunately this is the last batch of these, the price has gone up and our magic SMPS is no longer available...but I have 4 more of them to deck out.

Author:  Gio [ 23 Sep 2008, 23:08 ]
Post subject:  Re: Got a new mega-t amp yesterday

Hi Bill, are those from eBay? I recall seeing some similar boards up on eBay.

Author:  bone [ 24 Sep 2008, 03:29 ]
Post subject:  Re: Got a new mega-t amp yesterday

So what does he actually do to them then?

Tony.

Author:  billnchristy [ 24 Sep 2008, 05:07 ]
Post subject:  Re: Got a new mega-t amp yesterday

Yes they are from Ebay.

First:

There are a couple resistors in the input stage that create a high DC offset (my first one was 1.2v!!), these are removed.

The input caps are removed and replaced with large outboard caps.

Other input resistors are replaced with the resistors shown

Power caps are replaced

Inductors are changed

Output stage is trimmed down

Russian caps are added to the outputs.

Author:  bone [ 24 Sep 2008, 12:23 ]
Post subject:  Re: Got a new mega-t amp yesterday

I bought one of these, my offsets are about 300mv on one channel and 170 on the other.
I dont have a circuit of the board and it appears to be different from the one in the 2024 data sheet.
Which resistors do I need to remove to reduce my offset please?

Tony.

Author:  billnchristy [ 24 Sep 2008, 13:25 ]
Post subject:  Re: Got a new mega-t amp yesterday

There is a huge thread on diyaudio forums.

I will look when I get home...don't want to bum dope you.

Author:  billnchristy [ 24 Sep 2008, 20:32 ]
Post subject:  Re: Got a new mega-t amp yesterday

R3 and R16.

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