Pictures of your diy Pass amplifier - Page 111

malibujeff · 26th February 2012, 11:07 PM

Sven

Your F4 is AWESOME!

CENTRAL · 28th February 2012, 07:00 AM

Great F4!!! It would put (too) many hi-end amplifiers to shame! Great job - congratulations!!!

jleaman · 29th February 2012, 02:07 AM

Quote:

Originally Posted by CENTRAL

Great F4!!! It would put (too) many hi-end amplifiers to shame! Great job - congratulations!!!

I agree, that is top notch!

skunark · 29th February 2012, 02:42 AM

Sven,

Very impressive! Can you provide any details on the design process of the chassis?

Jim

markizor · 29th February 2012, 04:50 AM

It agree, very much impressively! Too it would be desirable details!

Abraxas336 · 29th February 2012, 07:52 AM

Thanks for the kind words.

The concept is straight forward – the case is built around the heat sinks, they are 300x150mm (Fischer KL-271). If the heat sinks are the sides we obviously need 4 other elements – lid, bottom, front and back. Front is 10mm aluminium, the other 3 parts are 6mm. Everything is CNC machined, shot blasted (glass pearls) and anodized. Not painted etc.. There are washers between the bottom/lid and the heat sinks to allow air exchange. The principle is copied from Chris “Elfenreiters” cases who is also one of the two guys who organized the PCB group buy etc.. You can find more information in the thread in the German Analogforum here.
Here are the pictures of Chris’ cases (registration required).

In the same thread you will see some pictures of my cases in different stages of “production”.

E.G. here after shot blasting before anodizing:

So – the concept is stolen (

), the details like engravings, bevels, logos, exact sizes etc. have been drafted by me and executed perfectly by a guy I know. I think this really makes the difference – it’s basically done perfectly. It’s not easy to get this kind of perfect result no matter how much money you are prepared to spend. You need to find somebody (or be somebody) who not only has the technical capabilities and skills but also really cares.

Best Regards
Sven

PS: I do have nightmares about accidentally scratching it!

Nelson Bass · 4th March 2012, 04:27 PM

Quote:

Originally Posted by Abraxas336

... the heat sinks, they are 300x150mm (Fischer KL-271).

Awesome looking amps!!! Well done!!

Where have you bought the heat sinks?

jacco vermeulen · 4th March 2012, 04:34 PM

Quote:

Originally Posted by Abraxas336

Pretty, isn't she?

Very
(don't shoot that one)

Abraxas336 · 05:23 PM

Apologies, the heat sinks are not Fischer, they are Seifert Electronic KL-271. I ordered them directly from Seifert. It's been a while.

Sven

PS: If you are not fed up yet - close-up's

1,2

fjpolo · 5th March 2012, 02:13 AM

First Pass project I make

had to say goodbye to my dear IRFP250, so I need a waay better heat sink
I'm not actually a fan of class A amps, but I'm really happy with this little guy

28th February 2012, 07:00 AM	#1102
CENTRAL diyAudio Member Join Date: Dec 2011 Location: Athens - Greece	Great F4!!! It would put (too) many hi-end amplifiers to shame! Great job - congratulations!!! __________________ My F5 is being constructed as we write...

29th February 2012, 07:52 AM	#1106
Abraxas336 diyAudio Member Join Date: Jul 2008	Thanks for the kind words. The concept is straight forward – the case is built around the heat sinks, they are 300x150mm (Fischer KL-271). If the heat sinks are the sides we obviously need 4 other elements – lid, bottom, front and back. Front is 10mm aluminium, the other 3 parts are 6mm. Everything is CNC machined, shot blasted (glass pearls) and anodized. Not painted etc.. There are washers between the bottom/lid and the heat sinks to allow air exchange. The principle is copied from Chris “Elfenreiters” cases who is also one of the two guys who organized the PCB group buy etc.. You can find more information in the thread in the German Analogforum here. Here are the pictures of Chris’ cases (registration required). In the same thread you will see some pictures of my cases in different stages of “production”. E.G. here after shot blasting before anodizing: So – the concept is stolen (), the details like engravings, bevels, logos, exact sizes etc. have been drafted by me and executed perfectly by a guy I know. I think this really makes the difference – it’s basically done perfectly. It’s not easy to get this kind of perfect result no matter how much money you are prepared to spend. You need to find somebody (or be somebody) who not only has the technical capabilities and skills but also really cares. Best Regards Sven PS: I do have nightmares about accidentally scratching it! __________________ Gruenschnabel

4th March 2012, 05:18 PM	#1109
Abraxas336 diyAudio Member Join Date: Jul 2008	Apologies, the heat sinks are not Fischer, they are Seifert Electronic KL-271. I ordered them directly from Seifert. It's been a while. Sven PS: If you are not fed up yet - close-up's 1,2 __________________ Gruenschnabel Last edited by Abraxas336; 4th March 2012 at 05:23 PM.

5th March 2012, 02:13 AM	#1110
fjpolo diyAudio Member Join Date: Jan 2012 Location: Right here	ZV1 First Pass project I make had to say goodbye to my dear IRFP250, so I need a waay better heat sink I'm not actually a fan of class A amps, but I'm really happy with this little guy

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26th February 2012, 11:07 PM	#1101
malibujeff diyAudio Member Join Date: Mar 2010 Location: Georgia	Sven Your F4 is AWESOME!

29th February 2012, 02:42 AM	#1104
skunark diyAudio Member Join Date: Sep 2011 Location: Pacific Northwest	Sven, Very impressive! Can you provide any details on the design process of the chassis? Jim

29th February 2012, 04:50 AM	#1105
markizor diyAudio Member Join Date: Feb 2012 Location: Ìîñêâà	It agree, very much impressively! Too it would be desirable details!

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