2x250 IRS2092 amp build

[stinems]

Re: 2x250 IRS2092 amp build

Here is another example. These are polarized caps. I used two of them with the + of one and - of the other joined to form the 'ground' for the amp.

The schematics you posted are fine. But I am like Wolf and Scott. I don't see how your cap filter board is similar to the schematics. Unlike the schematics, it seems you end up with two caps in series between a DC rail and ground bus; this makes each series pair an effective 2350 uF. Four sets of series pair in parallel gives 9400uF per rail.
If instead you were to put your two sets of 8 end to end, and solder a ground bus in line splitting each pair of caps you'd have something that would give you your 37600uF per DC rail.
Obviously what you have works and if it sounds fine as it is, live and let live.
Cheers!

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Re: 2x250 IRS2092 amp build

I think I am with Wolf on the capacitor hookup. Looks to me like each rail has the 8 caps connected with 4 pairs in series-parallel. That makes the capacitance of each pair half the value of each individual one. The diagrams posted don't show series-parallel pairs.

Mine is the same as the diagram.

[JimHRB]

Re: 2x250 IRS2092 amp build

I think I am with Wolf on the capacitor hookup. Looks to me like each rail has the 8 caps connected with 4 pairs in series-parallel. That makes the capacitance of each pair half the value of each individual one. The diagrams posted don't show series-parallel pairs.

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Re: 2x250 IRS2092 amp build

Here is a lovely example with 45000 per rail.

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Re: 2x250 IRS2092 amp build

Very nice! IIRC, Neil Davis said the 2092 designs were cleaner than most of the other
Class D chipamps. Plenty of power for demanding sources like AC/DC and Wagner.

Thanks Don.
Will get used 90% for movies. Big sound tracks demand lots of power. I think this will do the trick.

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Re: 2x250 IRS2092 amp build

Wolf is right with his capacitor math.

Here is another example. These are polarized caps. I used two of them with the + of one and - of the other joined to form the 'ground' for the amp.

[donradick]

Re: 2x250 IRS2092 amp build

Very nice! IIRC, Neil Davis said the 2092 designs were cleaner than most of the other
Class D chipamps. Plenty of power for demanding sources like AC/DC and Wagner.

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Re: 2x250 IRS2092 amp build

That's nice looking Lowell.

Stuff like this gets my juices flowing...There are so many fun aspects to the speaker/sound hobby, and I'd like to dabble in all of it!
I have a question, is the piece of plate metal between the Transformer and the amp in the second pic above there for some type of shielding, or as a heat shield from the amp?

TomZ

Thanks Tom.
Yes, copper shielding between the Transformer and amp. It generates no sound at the speakers without input.

[scottsehlin]

Re: 2x250 IRS2092 amp build

Are you sure about that. If so, then every PSU I have seen is wrong.

Wolf is right with his capacitor math.

[tomzarbo]

Re: 2x250 IRS2092 amp build

That's nice looking Lowell.

Stuff like this gets my juices flowing...There are so many fun aspects to the speaker/sound hobby, and I'd like to dabble in all of it!
I have a question, is the piece of plate metal between the Transformer and the amp in the second pic above there for some type of shielding, or as a heat shield from the amp?

TomZ

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Re: 2x250 IRS2092 amp build

You have them in series/parallel arrangement. That is 9400uF/'side'. Only parallel adds (doubles) capacitance. In series they will halve, but carry twice the voltage capacity.
Later,
Wolf

Are you sure about that. If so, then every PSU I have seen is wrong.
Its the same as Hong's http://techtalk.parts-express.com/sh...highlight=hong

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Re: 2x250 IRS2092 amp build

Anodized front, The rest is painted from the factory. Made all the holes with a step drill bit.

[hongrn]

Re: 2x250 IRS2092 amp build

Awesome Lowell! I was going to ask you about the amp's progress, but I'm glad it's done. Did you paint the case, or did you buy it anodized black?

Hong

[Wolf]

Re: 2x250 IRS2092 amp build

The PSU uses 8 per side caps from Apexjr. 2 bux per! 4700x 8 for 37000 per rail. [/IMG][/URL]

You have them in series/parallel arrangement. That is 9400uF/'side'. Only parallel adds (doubles) capacitance. In series they will halve, but carry twice the voltage capacity.
Later,
Wolf

[WesL]

Re: 2x250 IRS2092 amp build

Very nice. I really need to edu-mah-cate myself on this stuff a bit more.