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Old 4th February 2013, 08:36 AM   #1581
ppap64 is offline ppap64  Canada
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Join Date: Apr 2010
Location: Vancouver BC
Rookakoma, that is a superbly thought out amp project. So many creative touches !
Is the modular output stage your design along with those pretty little red boards ?
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Old 4th February 2013, 09:25 AM   #1582
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rookakoma's Avatar
Join Date: Nov 2007
Location: Budapest
Thank You!

The amplifiers are fully my design with PCB's.
The modular output stage ideas comes from Cortez (an another hungarian DIYAudio member).

Gerber files are available for private request, if you want to use it.

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Old 6th February 2013, 09:41 PM   #1583
WalterW is offline WalterW  Netherlands
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Join Date: Oct 2012
Location: Utrecht
Default Another F5 with beefier PSU's

Finally finished my F5, it was a lot of work and fun, and it sounds fantastic. Nothing like I have ever earned before...
Lot of thanks to Nelson Pass and all other forum members for all the tips and articles posted.
I've been reading for days, maybe weeks, but it was fun and I learned a lot.
I have a lot of pictures to post
The amp is dead quiet, not the slightest hum, and I can't hear any noise with my ear at the tweeter.
All the boards are from DIYAudio to support the forum and they are great nice boards.

Here are some pic's:
Attached Images
File Type: jpg dual PSU.JPG (629.1 KB, 1459 views)
File Type: jpg closeup psu.JPG (614.1 KB, 1364 views)
File Type: jpg tapping.jpg (414.8 KB, 1235 views)
File Type: jpg special ntc first ampboard.jpg (504.6 KB, 1152 views)
File Type: jpg thermal glue on leg.jpg (753.7 KB, 1132 views)
File Type: jpg first board almost ready.jpg (430.7 KB, 534 views)
File Type: jpg closeup3.jpg (753.7 KB, 488 views)
File Type: jpg first board finished.jpg (530.4 KB, 515 views)
File Type: jpg both finished.jpg (547.4 KB, 578 views)
File Type: jpg thermally connected, very nice soldering joints.jpg (629.4 KB, 563 views)
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Old 6th February 2013, 09:53 PM   #1584
WalterW is offline WalterW  Netherlands
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Join Date: Oct 2012
Location: Utrecht
And some more pic's of the finished F5......

The last foto is my next project: the F5 Turbo v2 with bigger Austerlitz KS300.6 heatsinks, 2sj201 / 2sk1530's and I want to do the EUVL trick with the extra 5 Ohms resistor in the 2SJ74's source. Also truing to build the chassis myself with the heatsinks I have. So again a lot of work to come...

Thanks again for all your knowledge
Attached Images
File Type: jpg overview.jpg (752.8 KB, 636 views)
File Type: jpg inside.jpg (694.0 KB, 550 views)
File Type: jpg inside2.jpg (540.0 KB, 412 views)
File Type: jpg all that gold.jpg (525.1 KB, 466 views)
File Type: jpg back2.jpg (308.2 KB, 439 views)
File Type: jpg backside.jpg (424.1 KB, 344 views)
File Type: jpg making music.jpg (540.7 KB, 424 views)
File Type: jpg with cover.jpg (440.1 KB, 447 views)
File Type: jpg front with cover.jpg (372.7 KB, 433 views)
File Type: jpg next project.jpg (424.0 KB, 546 views)
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Old 6th February 2013, 09:55 PM   #1585
bcmbob is offline bcmbob  United States
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Join Date: Dec 2009
Location: Bay City, Michigan
Your solder joints look perfect. Great Job on the entire build. I'm always interested in what speakers are being driven. Got any info?
Bob M.
"Arrange Whatever Pieces Come Your Way."
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Old 6th February 2013, 10:16 PM   #1586
WalterW is offline WalterW  Netherlands
diyAudio Member
Join Date: Oct 2012
Location: Utrecht
Hi Bob,

I have very old B&W DM600i's and the bigger ones DM610i's.
But I'm planning on building new speakers myself, they are a kit from a dutch store and are called 'Scanspeak mini monitor' Or the reference monitor, or the Vifa Column MK2, but i have to do more listening over there, to decide.

Cheers, Walter
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Old 7th February 2013, 08:02 AM   #1587
Marra is offline Marra  United Kingdom
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Join Date: Nov 2009
Location: Near Lincoln
Walter what are the heatsinks you used on the diodes? Thanks
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Old 7th February 2013, 09:02 AM   #1588
WalterW is offline WalterW  Netherlands
diyAudio Member
Join Date: Oct 2012
Location: Utrecht
Hi Marra,

I don't know the make and type of these sinks but i got them from in Amsterdam.
I went to their nice, little store and selected them.
The sinks are not on their website. Cost Euro 1,20 a piece.

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Old 7th February 2013, 11:00 AM   #1589
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Join Date: Jan 2010

congratulations for your work, where you buy the amp chassis
greetings from chile all
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Old 7th February 2013, 02:12 PM   #1590
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Join Date: Feb 2009
it looks to be a 3U300mm dissipante chassis in full aluminium from modushop.
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