Pcb group buy Symasym, AAK modell

[routhun]

Hi Al,

Thanks for your reply. Actually I am planning to 52V DC, so I ordered 4700uF, 63v capacitors. I am fine even if the finished board height is little high also. I am planning to use MJL3281/MJL1302 for outputs and MJE15030/MJ15031 drivers. Would it just be fine if I replace just MPSA18 with 2n5551 in SymAsym5.3 schematics to take care of increased supply voltage?


Thanks,
Routhun

 

[jef9200]

Hi,

AAK is my second diy projet, sym5.3 original was the first one ! (works perfectly with home made boards) so i'm newbie in electronics.. (but all was resume on one internet page..and informations easy to find.)
Now, i would have a little more power, so i think to use 2X30V transfos. I've find Nuvotem 2X30V (full load) 160VA 2,7A. (http://www.radiospares.fr/composants-electroniques-fr/1/index4084.htm) . I'll buy 2 and make centertaps.
Is this correct ?

I see the holes for elect capacitor are big, they must be snap-in ? I have some 4700uf 63v with pins from my first project.

With 42V DC , do i have to change some components from the BOM ?
I've read so much threads that i loose myself a little...and my english is a little to poor.

Many thanks for patience and help .

JF.

 

[ricoh]

AAK - PCB

Hi,

Is it too late to order 4 PCB ?

Ryssen - thanks.

ricoh

 

[AAK]

Hi Sheldon,

Using an external PS will work fine. Just make sure that you bypass D1 and D3, and not D2 and D4. Here's a schematic you can use for reference.

Regards,

Al

 

[hd38]

Thanks too, it will be very useful in my project to revamp an HMA-8300

Some questions :

1) purpose and ratings of the 0.2 resistors replacing D1 & D3 ?
(why is a simple strap not suitable ?)

2) do we still need C25->C28 el-caps if the ext PS has already a good filtering capacity ?

 

[SheldonD]

These questions belon more properly in the builders thread.

http://www.diyaudio.com/forums/showthread.php?s=&threadid=99739

or in the sequel thread
http://www.diyaudio.com/forums/showthread.php?s=&threadid=97640

And I was an early wrong poster, I will ask more questions in the builders thread.

SheldonD

 

[SheldonD]

If Mods agree could you move these posts?

 

[Ryssen]

Is it too late to order 4 PCB ?

Yes,no more boards.This time.Hmmm..

 

[ricoh]

Hi, Ryssen -- thanks.

Let me know if there will be a 3rd round...
Put me in for 4 PCB(s).

ricoh

 

[ganck]

Hi Ryssen,

My boards just arrived yesterday, thanks for your effort in organizing the group buy. Much appreciated!

 

[claiborne]

Ryssen,

Got the boards today. They look great! Thanks for organizing this buy. I'll be in for a few more if there a third run.

-claiborne😀

 

[mlloyd1]

Ryssen:
received the boards yesterday.
they look better than the pictures.
thanks for doing this.
😀
mlloyd1

 

[cromodora]

Received in Good Order

The 4 boards arrived in Singapore yesterday.

Thank you very much Ake!

 

[AAK]

Hi cromodora

Just wondering, whose Ake?

Regards,

Al

 

[CeeVee]

Got my Boards....lovely 🙂 Tks.

 

[SheldonD]

Boards arrived today.

Look very nice. Thank you.

 

[routhun]

Ryssen:
Boards arrived today. I second mlloyd1, they look better than the pictures. Thanks for doing this.

Thanks,
Routhun

 

[anatech]

Good show!!

Hi Ryssen,
I got my boards yesterday morning. They are great quality.

So, I'm very happy. A big thank you for running yet another buy.

-Chris

 

[cromodora]

Da Man

Hi cromodora

Just wondering, whose Ake?

Regards,

Al

Ake. Ryssen lah! He's da man for supplying the boards.
AAK. You da man for sharing your version and layout.

Mike (pronounced Mykay to rhyme with above names). Da man for the original design in the first place..

Thanks to all you guys.

 

[kiasu]

Hi Ryssen,

Beautiful boards received today. Thank you.