2stageEF high performance class AB power amp / 200W8R / 400W4R

[astx]

Electronic meets art ...

... off topic:

Electronic meets art!

One of my best friends has used some of my housekeeping pcb from the SA20XX series in a complete different way ...

Have fun,

Toni

 

[overpower]

H) SA2012 - LME49830 (180W@8R) using 3 matched pairs IRFP240 and IRFP9240:

• schematic can be found in this threads post 29
• gerber files in this threads post 31

Hello.
Seems pretty interesting stuff

But what program you have used to create this gerbers?
I tried to open it but can not find right tools .

I have some LME49810 / LME49830 and i have previously build LME49830+ single pair 2SJ200/2SK15429 and this sounds well


Thanks!

 

[astx]

open source tools have been used: geda and pcb for linux.
BR, Toni

 

[Tiroler]

Overpower,
You can download a free Gerber Viewer from GraphiCode - Software Innovations for Electronics Manufacturing
Then unzip Toni´s file in a folder, launch the viewer, create a new file and then use the import function to see the whole design or just single layers of it.
Cheers, Martin

 

[Tiroler]

Toni,
your circuit board ("print") makes a very nice print, love it!
Martin

 

[astx]

Thx Martin for answering overpowers question!
IMHO Michael has done a very good job recycling my failed pcbs in a complete different way.

Have fun,

Toni

 

[MarkB1]

... all 4 power amp modules tested (working all out of the box) and mounted on heatsinks.

Next steps:

1. soldering housekeeping circuits
2. cabling

Have fun!
Toni

Hi Toni,

How's it going? Can't wait to see the end result

 

[astx]

Off topic: new home cinema and laboratory

... sorry for the delay:
due to the new home-cinema + lab project )) the finalization of the brand new SA2017 VMOS amplifier is delayed till end of the year 2017.

BR, Toni

 

[Vrystaat]

Tony, I see a LOT of work and money !!

 

[astx]

DIY helps saving money here too!
Unfortunately it is really a lot of work.

 

[Vrystaat]

 

[Walkalone]

SA2018 - 12 pair MOSFET monster will need more research (e.g.: SOA checks; many more hours of simulation and tests). Currently I have a limited amount of spare time so you need to wait a few weeks ...

Stay tuned. I definitely will build a prototype if I find time.

BR, Toni

I'm waiting for next gen, manything learned from your projects. Thanks!
So how about new structure, somethings modern & hot like NGFB, CFA?

 

[astx]

Thx! To develop such a monster I need a bigger lab. This was one of the reason to start the homeconema/lab project.
NGFB amd CFA is out of my scope. IMHO too high distortions (thd, imd) in the audio range e.g. for mostly senseless high slew rates.
A symmetrical IPS may be a future project. Here I am hardly waiting on the new book from Bob Cordell!

BR, toni

 

[Tiroler]

Off topic again:

"Broken circuit"
...an old idea that I put into reality this evening

all the best,
Martin

 

[astx]

Indeed a very cool idea to recycle old parts to arts!
The title is cool too!

 

[diyralf]

Thx!

Case mount test so far OK. All parts fit.
Unfortunately the heatsinks are not 100% flat. During mounting the error is about 0.5mm in the middle. So we need some force to correct this during mounting.
Next time I need to do a better finish for the heatsinks before anodizing - especially for the saw edges.

Have fun, Toni

Very very nice work! ASTX, would you please post the URLs where you can buy the heatsink, the case parts etc.? Maybe this is mentioned already elsewhere, but the thread is monster long.

 

[astx]

Thx!

Heatsink: Kuhlkorper fur die Leistungselektronik - Cool Tec Electronic GmbH model ct-540 (SA2014) and ct-400 (SA2017)
Some case parts from Modushop by Hi-Fi 2000 | Contenitori per Elettronica | Electronic Enclosures | Hi Fi Chassis
Other parts are selfdesigned using QCAD and made either by Schaeffer AG: Home or Home - Cutworks - DE

BTW: you could do a thread search ...

BR, Toni

 

[diyralf]

Danke!

 

[astx]

Off topic: new home cinema and laboratory

... small progress.

Have fun,

Toni

 

[thimios]

... small progress.

Have fun,

Toni

Good work Toni!
Is all this work DIY?