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Old 8th May 2008, 04:45 PM   #21
AndrewT is offline AndrewT  Scotland
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Quote:
Originally posted by Dino-Indo
I also install additional smoothing caps on the PSU, as now I got 6 x 4700uF caps per power rail (total PSU capacitance now 28200 uF x 2... I hope it is not overkill hahahaha...) and I also changed the bridge rectifier with 4 SF4007 sinterglass avalance diodes... the result?? Awesome!!

Jawdropping bass.. its gets punchier and deep... also I noticed mid range and high improved... clearer...
that's odd.
So many chipampers claim that smoothing capacitance does absolutely nothing for bass response. Nice to know there's some out there that listen to the results of good PSU assembly.
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Old 8th May 2008, 08:30 PM   #22
bego2 is offline bego2  Croatia
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Nice. But i think it`s better two big capacitors of a lots of small...my opinion...

Sorry for the question..what`s the minimal power of transformer for stereo gainclone? i will use two 10000uF capacitors. thanks.
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Old 9th May 2008, 07:13 AM   #23
AndrewT is offline AndrewT  Scotland
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dozens and maybe hundreds of previous posts say
transformer VA>=maximum output power.
go read.
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Old 9th May 2008, 07:16 AM   #24
johny is offline johny  Indonesia
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i see the diode, kacang ijo ei . i always curious what improvement that diode brings.
andrewT: i change those 4700uF cap on psu with 10000uF, but i can't hear the different on bass response either, or maybe my ear isn't sensitive enough. i think i should have a visit to dino-indo to learn from him
bego2: once soundstream use this way of using many small psu caps rather than one big caps on their car amp. don't know about the new one.
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Old 10th May 2008, 10:30 AM   #25
eketehe is offline eketehe  Indonesia
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Hi Dino,
Congratulation...
Where you get the trafo?
as i see on the schematic pic( chipamp) thats double output ( 2 diode bridges ), yours must be 18-0 + 18-0.
the diodes... i tought they're telefunken...
I'm willing to have that Carlos FM's too....
Pls help... teman

Quote:
bego2: once soundstream use this way of using many small psu caps rather than one big caps on their car amp. don't know about the new one.
I think thats because the big caps can not fit into the slim cars amp.
There also resonance problem to have a lot of small caps on PSU, but yes,in case car amp, me-self will not sensitive enough to compares. there a strong competition between the trafic, my audio, bajaj audio, engine audio, and.... other car's for 'deff subwoofer' lol
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Old 10th May 2008, 05:25 PM   #26
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Hola Eketehe...
You got mail!!

Yep, you are correct.. I'm using 18V only... and those are Vishay Telefunken SF4007 avalanche... quite expensive for me tho... but I do like the sound improvements...
As also confirmed by my wife ... a casual listener...
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Old 11th May 2008, 02:14 PM   #27
eketehe is offline eketehe  Indonesia
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Quote:
Originally posted by Dino-Indo
Hola Eketehe...
You got mail!!

Yep, you are correct.. I'm using 18V only... and those are Vishay Telefunken SF4007 avalanche... quite expensive for me tho... but I do like the sound improvements...
As also confirmed by my wife ... a casual listener...
Wow, nice achievement.
I'm fail to find toroidal trafo yours here, hope you will kindly tell me where i can find it and whats the price?
I maybe goes to Jakarta in this near future.
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Old 13th May 2008, 02:16 PM   #28
eketehe is offline eketehe  Indonesia
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Quote:
Originally posted by Dino-Indo
Hola Eketehe...
You got mail!!

Yep, you are correct.. I'm using 18V only... and those are Vishay Telefunken SF4007 avalanche... quite expensive for me tho... but I do like the sound improvements...
As also confirmed by my wife ... a casual listener...
Hi Dino!
I'm Sorry...,I just find your PE!
Thankyou verymuch
Thakyou
Thanks again
Terimakasih,
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Old 14th May 2008, 08:40 PM   #29
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Quote:
Originally posted by AndrewT
So many chipampers claim that smoothing capacitance does absolutely nothing for bass response. Nice to know there's some out there that listen to the results of good PSU assembly.
These chipampers should place a switch between the capacitor banks and the psu. I did with 1000 uF / 22000 uF and can tell that high capacitance sounds much, much better.
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Old 15th May 2008, 01:36 AM   #30
sneih is offline sneih  Indonesia
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hi friends.... how much you make gainclone at rupiah?

Good job, Gracias
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