Opa541 - Bpa-200

kinser · 10th September 2005, 07:35 PM

Hi all,

I have just started my OPA541 based BPA-200 and i wanted to know if I could use 0.33 Ohm resistors insted of 0.1 Ohm resistors for the 2 parallel amps ? main reason is because i cant find 0.1 Ohm resistors near by me and second reason is because i have a load of 0.33 Ohm resistors!

Thanks,
Kinser

lawbadman · 10th September 2005, 08:49 PM

As far as I know 0.33 resistors will be just fine, and a bit more safe as the peak current will be slightly less, which means safer operation.

So unless someone else knows otherwise I would say go for it.

mateo88 · 10th September 2005, 09:50 PM

Why don't you parallel two or three of the .33 ohm resistors?

kinser · 11th September 2005, 11:11 AM

Hi again,
Thanks for you relpys.. i think im going to do mateo88 said: Im gonna parallel two 0.33 Ohm resistors to make about 1.65 Ohms!

I do have 2 more Q's:

1. How do i parallel 2 amps? just add the resistors to the output of each amp and connect the same input the amps? (Like this http://mars.walagata.com/w/matttcattt/audio/Fig2.GIF exept in NI mode?)

2. can i use this http://sound.westhost.com/project14.htm circuit for the bridging part?

Thanks,
Kinser

kinser · 11th September 2005, 07:39 PM

Anyone out there?

Kinser

mateo88 · 11th September 2005, 08:43 PM

1. Yes, that is all you do to parallel them.

2. You most definetly can use that bridging adapter. You may want to have a look at this also.

Good luck with your

!

10th September 2005, 07:35 PM	#1
kinser diyAudio Member Join Date: Jan 2004 Location: R'aanana	Opa541 - Bpa-200 Hi all, I have just started my OPA541 based BPA-200 and i wanted to know if I could use 0.33 Ohm resistors insted of 0.1 Ohm resistors for the 2 parallel amps ? main reason is because i cant find 0.1 Ohm resistors near by me and second reason is because i have a load of 0.33 Ohm resistors! Thanks, Kinser

10th September 2005, 08:49 PM	#2
lawbadman diyAudio Member Join Date: Mar 2003 Location: St. Catherine, Jamaica	As far as I know 0.33 resistors will be just fine, and a bit more safe as the peak current will be slightly less, which means safer operation. So unless someone else knows otherwise I would say go for it. __________________ <a href="http://www.danasoft.com"><img src="http://www.danasoft.com/sig/lawbadman.jpg" border="0"></a><div style="font-family:arial,sans-serif;font-size:11px;"><p>Sign by Danasoft - <a href="http://www.danasoft.com">For Backgrounds and Layouts</a></p></div>

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10th September 2005, 09:50 PM	#3
mateo88 diyAudio Member Join Date: May 2004 Location: Argyle, Texas	Why don't you parallel two or three of the .33 ohm resistors?

11th September 2005, 11:11 AM	#4
kinser diyAudio Member Join Date: Jan 2004 Location: R'aanana	Hi again, Thanks for you relpys.. i think im going to do mateo88 said: Im gonna parallel two 0.33 Ohm resistors to make about 1.65 Ohms! I do have 2 more Q's: 1. How do i parallel 2 amps? just add the resistors to the output of each amp and connect the same input the amps? (Like this http://mars.walagata.com/w/matttcattt/audio/Fig2.GIF exept in NI mode?) 2. can i use this http://sound.westhost.com/project14.htm circuit for the bridging part? Thanks, Kinser

11th September 2005, 07:39 PM	#5
kinser diyAudio Member Join Date: Jan 2004 Location: R'aanana	Anyone out there? Kinser

11th September 2005, 08:43 PM	#6
mateo88 diyAudio Member Join Date: May 2004 Location: Argyle, Texas	1. Yes, that is all you do to parallel them. 2. You most definetly can use that bridging adapter. You may want to have a look at this also. Good luck with your !

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