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Chip Amps Amplifiers based on integrated circuits |
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#1 |
Banned
Join Date: Mar 2003
Location: Lisbon, Portugal
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Here it is.
Results are impressive, this elevates the chipamp to a league of it's own. ![]() ![]() ![]() I'm using 2,200uf. This regulated PSU is good for two chips (LM3886, etc.). As a side note, this is not only a PSU for chip amps. There are discrete class-A amps around that use the LM338 regs. These amps will also benefit from the snubber. No, let me put it this way: every regulated PSU benefits from a snubber. ![]() The values for the snubber were calculated for the LM338's output impedance. Don't ask me how, I won't reveal it. Enjoy. ![]() |
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#2 |
diyAudio Member
Join Date: Jan 2004
Location: Montreal
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I knew you wouldnt resist sharing your most recent recipe
![]() how does this supply compare to non-regulated high-cap snubbed PSU? Is this the new chip amp PSU king ![]()
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Most people wouldn't know good music if it came up and bit them in the ***. - Frank Zappa |
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#3 |
diyAudio Member
Join Date: Jun 2004
Location: Windy City
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Now, if I could run four chips off this...
![]() Wonder what the flavor of the month will be next month. Discrete? ![]() C |
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#4 | ||
Banned
Join Date: Mar 2003
Location: Lisbon, Portugal
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Quote:
![]() I couldn't help but sharing... ![]() Quote:
Deam it, this stereo power amp sounds better with my speakers than a Krell integrated (used as a power amp) I had at home last week. ![]() What's on my plans for soon is to make two small monoblocks with two chips each for bi-amping my Epos ES11 speakers. |
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#5 |
diyAudio Member
Join Date: Dec 2004
Location: Lisboa
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I will tell a friend to try it on a stereo bridged LM4780 amp.
(my PSU is not regulated) I hope to have news tomorrow. Since you don't tell the miraculous formula, I will tell him to buy thousands of caps and resistors to find out the best combination ![]() ![]()
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If you want power you must add control |
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#6 | |
Banned
Join Date: Mar 2003
Location: Lisbon, Portugal
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Quote:
![]() ![]() You have a complete PSU schematic with the right values. What do you want more? ![]() ![]() |
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#7 | |
diyAudio Member
Join Date: Jan 2004
Location: Montreal
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Quote:
i think he wants to check your math ![]()
__________________
Most people wouldn't know good music if it came up and bit them in the ***. - Frank Zappa |
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#8 |
diyAudio Member
Join Date: Dec 2004
Location: Lisboa
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You got me...
![]() ![]() ![]() [inocent] ![]() If you say that this one is much better, I will give it a try but I only have 8,600uF caps. What electronic House you recommend in Lisboa ? I will have to buy some parts.
__________________
If you want power you must add control |
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#9 | |
diyAudio Member
Join Date: May 2004
Location: Argyle, Texas
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![]() Quote:
If you pretend the power supply is a speaker and calculate a zobel for it, that gets you in the general ballpark. Mess around with the values a little to see what works best. |
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#10 | ||
Banned
Join Date: Mar 2003
Location: Lisbon, Portugal
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Quote:
On this PSU you should have around 10V more voltage before the regs, so there's plenty of voltage to sag. After the regs, the voltage is steady as a rock, of course. ![]() Big capacitance is not needed, 4,700uf is fine, or up to 10,000uf. Quote:
There's a guy in Cacem that has Philips caps is almost all values, and 1% film resistors. It's on the main street, on the Bons Amigos (I think it's called this way) shopping center. |
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