Lm3886 Bpa

[Tombson]

Would this work? Does it need some changes?

 

[jan.didden]

Would WHAT work?

Jan Didden

 

[audioPT]

Looks Great!

But don't know what

Attach some file or pic

 

[carlosfm]

Would this work? Does it need some changes?

You need some changes.
You need to show us the circuit, because without it, it won't work.

 

[Upupa Epops]

It will be work - it is schematic from application manual and manufacturer isn't any idiot .

 

[audioPT]

Oh yeah!

The old BPA-300

By the way, the new National site product tree design it's just great

A Pic of a VERY CHEAP LM3886 Bridge-Parallell:

An externally hosted image should be here but it was not working when we last tested it.

and

An externally hosted image should be here but it was not working when we last tested it.

(with my appologies to BrianGT by using the picture from his server)

 

[carlosfm]

It will be work - it is schematic from application manual and manufacturer isn't any idiot .

Wait... that file was not there.
Moderation?
Tombson is a new member, maby it's moderation.
Welcome, Tombson.
That schematic is the BPA200, it should work.

 

[MWP]

A Pic of a VERY CHEAP LM3886 Bridge-Parallell....

AFAIK, the Rowland amp isnt bridge/parallel... its 6 * LM3886s paralled per channel.

 

[carlosfm]

AFAIK, the Rowland amp isnt bridge/parallel... its 6 * LM3886s paralled per channel.

No, that can't be.
Do you mean it has around 50~60 watts RMS at 8 ohms?
I don't think so.

 

[audioPT]

Well, I can't find the photos that illustrate Jeff Rowland as the real Bridge-Parallell application, just like the National PDF file...


I think the amp has about 250W channel... isn't that Carlos?

 

[carlosfm]

I think it has something like around 200~250 wrms at 8 ohms, with lots of current.
This thing should double the power at 4 ohms and almost double again at 2 ohms.

 

[Lazyworm]

AFAIK, the Rowland amp isnt bridge/parallel... its 6 * LM3886s paralled per channel.

That Amp from Rowland (Model12) is indeed bridge parallell, as it is a monoblock you are looking at

I have been on my way to clone it for a long time but now finally I think Ill have the time to fix the last things on it .

 

[jkraxi]

Sorry, I know that is an old post but I have a question for u! Does anybody have a schematic of that (from image) Jeff Rowland's product? PLS!!!

 

[jkraxi]

By the way! What are those orange lines?

 

[thomasfw]

Dear all,
I can see "Micro Relay" and "Trim Pot" in the photo.
What are they use for ?


Thomas

 

[banana]

Those "Dales" are power resistors. The trim port is for DC-offset adjusmnet.

Rowland Concentra Review

 

[thomasfw]

Thanks !
Do you know where we can get the chip and PCB(kit) in Hong Kong ?(Good Price)

Wah Fai, Mak's etc


Thomas

 

[transducer]

By the way! What are those orange lines?

I believe that they are the power buss bars. Rowland describes them in one of their reviews or product pages.

I was almost laughing at their "innovative technology" claims. Their marketing guys sure are good.

Ron

 

[thomasfw]

If the trim pot is for off-set, how to connect ?

Thanks !

Thomas

 

[jaudio]

It go bewteen the + signal input and ground. I connect two of the pin of the trimpot together,that is connect to + signal input and the remaining pin is connected to ground. This is for inverted mode amp.