LM338 regulated snubberized PSU for audio amplifiers - Page 9

jleaman · 1st May 2005, 08:17 PM

idefixes can you email me..

J'

Idefixes · 1st May 2005, 08:23 PM

Quote:

Originally posted by jleaman
idefixes can you email me..

J'

Done

Marc

neutron7 · 1st May 2005, 10:00 PM

I "snubberized" this regulator board i made before.

it has a (optional) tracking preregulator but that would be more for when it was used with less powerful regulators for a preamp supply.

maybe ill make a short version that follows the snubberized supply exactly. the board is one sided and has no bypasses.

Bricolo · 2nd May 2005, 04:56 AM

what's this /\/\/\/\ track?

neutron7 · 2nd May 2005, 05:20 AM

It was left over from a board that has 3 regulators on it working in parrallel for 15 amp output . you need a very small value "ballast" resistor to even the outputs of the regulators (much like the way parrallel amps have a resistor)

anyways i left part of it in on this board because i want to see if there is any difference with the sense resistor for the preregulator before or after that. if it has an adverse effect just being there it can be shorted out with a heavier wire

the 15 amp regulator was going to be for a BPA200 type amp but the last carlosfm (big cap) PSU convinced me i did not need one (3886 is fine!)

mwmkravchenko · 2nd May 2005, 12:16 PM

Nice boards idefixes !
How are they coming along? I read that they were going to be checked out for errors. I'd be happy to help if it is still needed.
Or if they are good could you e-mail me a copy?

Mark

Idefixes · 2nd May 2005, 01:57 PM

Quote:

Originally posted by mwmkravchenko
Nice boards idefixes !
How are they coming along? I read that they were going to be checked out for errors. I'd be happy to help if it is still needed.
Or if they are good could you e-mail me a copy?

Mark

They need to be checkked and correct. I will reroot them under eagle. When they are Ok i will share them

Marc

mwmkravchenko · 2nd May 2005, 03:03 PM

I'll look forward to your posting. I'm not a PCB pro either but I do have Eagle pro. If it will help you I could take a look to. An extra set of eyes never hurts!

MArk

Idefixes · 2nd May 2005, 03:09 PM

Quote:

Originally posted by mwmkravchenko
I'll look forward to your posting. I'm not a PCB pro either but I do have Eagle pro. If it will help you I could take a look to. An extra set of eyes never hurts!

MArk

You 're wellcome.

Marc

thomasfw · 16th May 2005, 05:27 AM

Dear neutron 7 and all,

Quote:

It was left over from a board that has 3 regulators on it working in parrallel for 15 amp output . you need a very small value "ballast" resistor to even the outputs of the regulators (much like the way parrallel amps have a resistor)

Would you please post the schemtic !

Thomas

2nd May 2005, 04:56 AM	#84
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	what's this /\/\/\/\ track? __________________ Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease

2nd May 2005, 12:16 PM	#86
mwmkravchenko diyAudio Member Join Date: Jan 2002 Location: Perth Canada	Nice boards! Nice boards idefixes ! How are they coming along? I read that they were going to be checked out for errors. I'd be happy to help if it is still needed. Or if they are good could you e-mail me a copy? Mark __________________ Mark

2nd May 2005, 03:03 PM	#88
mwmkravchenko diyAudio Member Join Date: Jan 2002 Location: Perth Canada	Thanks for the reply Marc I'll look forward to your posting. I'm not a PCB pro either but I do have Eagle pro. If it will help you I could take a look to. An extra set of eyes never hurts! MArk __________________ Mark

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1st May 2005, 08:17 PM	#81
jleaman Banned Join Date: Apr 2002	idefixes can you email me.. J'

2nd May 2005, 05:20 AM	#85
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	It was left over from a board that has 3 regulators on it working in parrallel for 15 amp output . you need a very small value "ballast" resistor to even the outputs of the regulators (much like the way parrallel amps have a resistor) anyways i left part of it in on this board because i want to see if there is any difference with the sense resistor for the preregulator before or after that. if it has an adverse effect just being there it can be shorted out with a heavier wire the 15 amp regulator was going to be for a BPA200 type amp but the last carlosfm (big cap) PSU convinced me i did not need one (3886 is fine!)

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