More VA power, more O/P power.

Posted by cheap-Jack (M) on March 1, 2006 at 07:59:15

In Reply to: Good! And some more details! posted by Granholm on February 28, 2006 at 12:26:10:

Hi.

But your power iron is only rated for 300VA, so the best you may be able to get is 120Wrms/channel assuming the overall efficiency is 80%
(PSU+class D power modules).

Where you get 94% efficiency that high for your moduls. What switching topology was used there?

Why you need so high power anyway? Certainly not for normal home use or your neighbours will surely complain you let alone your family.

If you really want it for certain PA use, then you got to replace a
higher VA power transformer with higher B+/B- voltage required by the module design. Say if you really want to get 2x200W/8R, then
you surely need a power iron rated not less than 500VA with B+/B-
to fit the modules. Otherwise, the power iron will get overloaded, causing B+/B- voltage drops & hence O/P power.

The filter caps & bridge rectifiers got to be beefed up accordingly.

c-J

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Follow Ups Full Thread

Topic - Any X former experts? - Granholm 09:53:22 02/26/06 (18)

Re: Any X former experts? - mettula 14:41:30 02/25/07 (0)

Try Amveco #AA56252-038 - Russ57 10:28:50 03/02/06 (4)

Might get in trouble as my main is 230V AC ;o) nt! - Granholm 12:32:09 03/02/06 (0)

Re: Try Amveco #AA56252-038 - Granholm 11:41:39 03/02/06 (2)

Re: Try Amveco #AA56252-038 - Russ57 12:18:17 03/02/06 (1)

I have heard that before (EI is better) - Granholm 12:29:45 03/02/06 (0)

I'm not a whatever expert. - cheap-Jack 12:25:24 02/27/06 (11)

Might not have been all that clear ;o) - Granholm 12:42:04 02/27/06 (10)

You want to post the specs of the amp.. - cheap-Jack 13:00:38 02/27/06 (9)

Here thay are! - Granholm 13:13:26 02/27/06 (8)

Are this the spec you need? - Granholm 10:16:22 02/28/06 (6)

Yes, I got it now. - cheap-Jack 11:15:56 02/28/06 (5)

Good! And some more details! - Granholm 12:26:10 02/28/06 (4)

More VA power, more O/P power. - cheap-Jack 07:59:15 03/01/06 (3)

Dead end? - Granholm 12:36:37 03/01/06 (2)

Not yet. (long) - cheap-Jack 13:14:09 03/01/06 (1)

Not that long ;o) - Granholm 13:25:55 03/01/06 (0)

Sorry, I missed the specs. Pls re-post. (nt) - cheap-Jack 07:32:53 02/28/06 (0)

Follow Ups

More VA power, more O/P power. - cheap-Jack 07:59:15 03/01/06 (3)

Dead end? - Granholm 12:36:37 03/01/06 (2)

Not yet. (long) - cheap-Jack 13:14:09 03/01/06 (1)

Not that long ;o) - Granholm 13:25:55 03/01/06 (0)

More VA power, more O/P power.

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