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Old 31st October 2011, 07:23 PM   #311
BMW850 is offline BMW850  Netherlands
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Hi Rudi,


These are very very cheap "you might almost think they are fake"

Regards,
Rudy
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Last edited by BMW850; 31st October 2011 at 07:25 PM.
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Old 31st October 2011, 07:40 PM   #312
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No fake, Rudy, but these series of capacitors is abandoned by NICHICON.
That is why the price is that low!

Best regards - Rudi
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Old 31st October 2011, 07:59 PM   #313
BMW850 is offline BMW850  Netherlands
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Thanks Rudi

Tonight I will order 8 pieces, and hope they are good quality caps

Regards,
Rudy
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Old 31st October 2011, 08:10 PM   #314
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Default Dear Juan Vargas ... our friend Meanman is studying what to do

soon we gonna have some return from him, and them this gonna be published and i will send you email informing for sure.

He is thinking to make some small modifications... about clearance to heatsink (on board ones) ... some tracks may be enlarged .... suggested transistor model numbers will be printed into the silk screen .... board will be painted red both sides... and so on.

Also Byron can open a second round if he decided to do .... this way we gonna have more boards available in a matter of a couple of months to come.

No circuit change.... the problem related on board heatsink (clearance to produce room to a bigger ones, or to install them in the main heatsink, or to fix them below the board) will be solved too.

Meanman is free to make small modifications, making interface with Alex mm or changing himself together the board manufacturer company that usually produce tests in his layouts .... he will suggest some ideas ... but for sure the amplifier will be the same unit with minor modifications into the pcboard layout.

As i had that surprise... the heatsinks not large enough ... then i decided to make a step back, or to work in the most safe side... assembling the board myself prior to deliver them to forum folks... to avoid surprises i will be the first to assemble and test the circuit assembled into the same board you will receive.

regards,

Carlos
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Last edited by destroyer X; 31st October 2011 at 08:16 PM.
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Old 1st November 2011, 07:04 PM   #315
Junie is offline Junie  Philippines
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Default Testing in progress

I made a Toggle switch using 555 timer, circuit can be found in other website, also i finished Ostripper softstart hook it up altogether for checking and it works the way it supposed to be, very happy with the outcome. I like those "circle green light"

Here are some pics of my progress, messy but satisfying.
Attached Images
File Type: jpg Pic1.JPG (744.9 KB, 407 views)
File Type: jpg Pic2.JPG (776.1 KB, 357 views)
File Type: jpg Pic3.JPG (787.3 KB, 308 views)
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Old 1st November 2011, 10:01 PM   #316
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Default Nice work Junie.... i would like to show Juan Vargas pictures

He will use 54 volts supplies....he bought a larger heatsinks as you can see and installed the CCS and VAS into the larger heatsinks.

Click the image to open in full size.

Uploaded with ImageShack.us

Good.

regards,

Carlos
Attached Images
File Type: jpg Heatsink 1.jpg (72.6 KB, 261 views)
File Type: jpg Vargas board.jpg (196.7 KB, 185 views)
File Type: jpg Power transistors.jpg (94.7 KB, 187 views)
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Old 1st November 2011, 11:33 PM   #317
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Quote:
Originally Posted by Junie View Post
I made a Toggle switch using 555 timer,

Junie , when you say that , i'm assuming you used a 555 timer in some way as a relay circuit because those switches are only rated at 2A ? am i correct and if so , please tell me how . i love those switches but their max amp rating is such a limiting factor .

cheers Woody
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Old 2nd November 2011, 02:45 PM   #318
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VAS & CCS Heatsinks; is it best to raise them from the board surface for the convection effect to be more effective?
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Old 2nd November 2011, 03:11 PM   #319
Junie is offline Junie  Philippines
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Quote:
Originally Posted by Woody1911a1 View Post
Junie , when you say that , i'm assuming you used a 555 timer in some way as a relay circuit because those switches are only rated at 2A ? am i correct and if so , please tell me how . i love those switches but their max amp rating is such a limiting factor .

cheers Woody
Hey Woody, yeah 555 as pre driver and used SSR instead of Relay.

More info can be found here: Toggle ON / OFF Switch
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Old 2nd November 2011, 03:42 PM   #320
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Talking vargasmongo personal layout changes "heat sink'

Today a did some changes on my layout, I change the heat sink for a taller ones and the silk screen too, of course this is Alex MM layout don't get me wrong that is the man! well I got to keep looking analising and all that, I hope you guys like my ideas, "I hope so" lol , alright guys have a good one.
Attached Images
File Type: png original heat sink.PNG (66.1 KB, 130 views)
File Type: png heat sink changes part 1.PNG (67.1 KB, 111 views)
File Type: jpg heat sink changes 2.jpg (195.6 KB, 122 views)
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