Y.C.,
Hehe.. we all do that sometimes.. I did lose lotsa sleep when I was playing with the T-Amp at the early stage.. hehe.
Thank you, that's very kind of you. Yes, I don't see why not! Count me in!
Gonna hit the sack shortly.. G'nite guys! Sweet dreams..

Y.C.,
Thanks for the link!
Will definitely read it later (much much later..) barely awake now.. hehe

Y.C.,
Same here! I wasn't aware of EPCOS until pointed out by my son! As we all know, I am using two EPCOS caps on my T-Amp..
We all know about the evr popular WIMAs..

You go on ahead with the orders, I am with you guys. Bill me later, no problemo!

I have read the details at the mardis's site earlier.. just that I do not remember the site.
It was specific to the Sonic Impact's board, which is not much different basically from our/evaluation board layout..
Let's DO IT then!

ongbs,
Great and compact looking! I like it!
BTW, Where did you get those inductors? Mean looking stuffs!

LED no light also ok.. it’s the sound that counts!

xtorm,
those softdrink cans are no good here. They're aluminium!
U need iron/steel… non-magnetically permeable stuffs..

Took some time off during lunch and hit JP for some stuffs
Got meself:

1. SMPS 12VDC 4.5A - same price as T-Amp!
2. LCR Meter - China Made but what the heck, now I can measure...
3. Binding Post - for speaker connections
4. Ferrite rings }
5. Enamelled copper wire } DIY toroid inductor project
6. Hakko soldering Iron..

I have decided to go with SMPS- Cheaper than a linear PSU, therefore Value For Money!

Oooo am I gonna be busy this weekend..

I already have a temperature controlled one! This one for general use... This is iron no. 7! I must be nutz!

NO! NO! NOT 5000 Euro! Just 100 bucks! Can you believe it? Normal 3.5 digital display

We see how lah!
But I'll try NOT to dissappoint you..
BTW I got some good looking LEDs. Forgot to mention this earlier.
I love the clear orange ones.. Had installed one on my LD2+ Headphone amp before I sold it off.. man, they look good in the dark!
Glowing like little valve...

This post has been edited by jazzy939: Aug 28 2008, 06:53 PM


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hi mysghooi,
Sorry for the late reply, just got back home
Make sure the regulator can take the current from your transformer.. should be at least 2A, 3A preferably.
Instead of replacing the 1000uF, why not install it at the output of the regulator as a reservoir capacitor? It would certainly enhance the voltage/current output.. See attached diagram, the cap C is the reservoir capacitor. If you wanna replace the 1000uF I don't see any issues with it..


The 4.5A SMPS is mine. You wanna see the pix?

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Added on August 29, 2008, 12:59 ammysghooi,
I think its too much ler!
I'm using a 25W only.. 40W would be the max..

This post has been edited by jazzy939: Aug 29 2008, 12:59 AM


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gabanyayaya,
This T-Amp fortunately is notreally choosy about the type of power supplies..
See attached pic. This as simple as it gets.. Simple Full Wave Rectifier.



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Value? Use 'some' value capacitor(electrolytic), observe the polarity and WV(working voltage, more is OK but NOT less). This smoothing/or reservoir capacitor to reduce the DC ripple. The bigger the value, the less the ripple, therefore the better! Bigger=expensive

Your diagram is correct. The rectifier can be in the form of diode(1/2 wave) or 4 diodes/bridge rectifier for FULL wave rectification. It can also be a regulator board/circuit.

SMPS is a different ball game altogether.. too complex to DIY but not impossible

gabanyayaya,
this a block diagram of a SMPS.




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Earlier I thought of taking the linear PSU way.. after counting the costs of making a good one versus a ready made SMPS one, since we're always keeping to the 'best value for money' approach, the SMPS wins hands down. The costly part of a linear PSU is the tranny.. we're not even using the toroid tranny! ON top of that, the T-Amp isknown to perform better with SMPS

My T-Amps are configured as a Power Amp. I am using two T-Amps boards for bi-amping purposes. The SMPS will supply the two boards.
I also have connections for external PSU/Battery choices... 3 different power supply!

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Added on August 29, 2008, 1:50 amLate? No lah.. it's early friday morning!

NO, I'm afraid to don't have that album Wahh very young Mr. Watanabe!
Great bring it along the next time!

This post has been edited by jazzy939: Aug 29 2008, 02:01 AM

Y.C.,
Thank you for the effort. I appreciate it very much!
I am agreeable to the proposed buy.

I have heard and read about Vishay parts.. It's time to sample and experience them first hand!
BTW, your PM did arrived but I did not read it until just now! My apology.

Y.C.,
While you're at it, can you include me for the Vishay's 20K resistors too? Might as well go ALL the way

Ooopss. its two in the morning! Time to hit the sack. G'nite all!

Thanks Y.C.!
G'nite y'all!

ongbs,
"early birds" catch the best 'worms'?

Will look forward with your report! I will also report on my spanking new 12V 4.2A SMPS
Gonna see if there would be difference between the 2.5A and 4.5 versions..

This post has been edited by jazzy939: Aug 29 2008, 09:16 AM

mysghooi,
Since you asked for the SMPS pictures; here it is!


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mysghooi,
Sure I can get you one.. there's more from where I got them! Send by post?
Yes. All you need is an ac power cord connected to the terminals marked "L" & "N".

One of the reasons why I resorted to SMPS was the unavailability of 12V 3A regulator kits @ JP. The last of the stocks was snapped up by another LYN forumer after he saw my bench PSU, also doing some power supply projects He bought the last 3!

This post has been edited by jazzy939: Aug 29 2008, 10:02 AM

ongbs,
Yes it IS! Other shops are selling it at RM80!
That particular shop is the exception. I was haggling to lower it to RM50! Would have got it if the 'towkey' was around.
Guess I was lucky..

This post has been edited by jazzy939: Aug 29 2008, 10:00 AM

There's a 1.3A version going for RM38
Yeah.. it’s a Made in China thingy.. looks very well finished. The reason why I bought it..
The shop is in Jalan Landak off Jalan Pasar.