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Old 12th July 2011, 11:16 PM   #1871
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Default Want to travel to the past in a time machine?

Look the way we used to make amplifiers 40 years ago.... without computers, or software, or scanners or printers... the stuff was not discovered..only thermal printers and some Z80 computers.

The way this was made... with pen, nail polish, drawing and corroding using chemical products available since the fifties constitutes in a free ticket for your to travel to the past.... the ones who lived through that era will remember ... and young people will understand as we did when there were no computers that could help us.

A diy, handmade and homemade board style.

regards,

Carlos
Attached Images
File Type: jpg Placa diagonal.jpg (262.0 KB, 1067 views)
File Type: jpg Placa por baixo.jpg (85.7 KB, 1024 views)
File Type: jpg Silk detail.JPG (237.2 KB, 985 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg

Last edited by destroyer X; 12th July 2011 at 11:20 PM.
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Old 12th July 2011, 11:42 PM   #1872
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Quote:
Originally Posted by destroyer X View Post
Look the way we used to make amplifiers 40 years ago.... without computers, or software, or scanners or printers... the stuff was not discovered..only thermal printers and some Z80 computers.

The way this was made... with pen, nail polish, drawing and corroding using chemical products available since the fifties constitutes in a free ticket for your to travel to the past.... the ones who lived through that era will remember ... and young people will understand as we did when there were no computers that could help us.

A diy, handmade and homemade board style.

regards,

Carlos
I like it. So, nail polish works well as etch-resist? Permanent marker is not so good for me.

I just started etching PCBs, so I still have a lot to learn. I have been using the laser printer at work and hydrochloric acid/hydrogen peroxide mixture. The printer I think is not good quality because the transfer of the toner to the PCB is never perfect, no matter what I try. That blue stick n peel stuff is expensive so I will not try that. I cover every trace with a layer of solder and clean it well to protect against the possibility of hairline trace cracks.

Carlos! Give me some tips on how to make an enclosure for my DX Precision I. I have the guts of the enclosure, and the bottom. I also have a top cover. But, I am stuck on the rest. I don't have access to many tools outside of what I need for electronics work.

Click the image to open in full size.
Click the image to open in full size.

Last edited by odysseybmx414; 12th July 2011 at 11:54 PM.
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Old 13th July 2011, 01:11 AM   #1873
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Default Nail polish is resistant to acid attack... reason why i am using it

thank you..... in the reality i am not that good about enclosures, the ones i have made are terrible... the one i know is very good is Fótios from this forum..... he is awesome...not a diy i think...he may do diy (amateur)
but the guy works alike, and even better, than a Pro.

My email adress is:

nanabrother@hotmail.com

I can try to help you, but i know nothing about enclosures, will be easier you to help me than the opposite...well...i can try.

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 13th July 2011, 01:19 AM   #1874
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Originally Posted by destroyer X View Post
I can try to help you, but i know nothing about enclosures, will be easier you to help me than the opposite...well...i can try.

regards,

Carlos
I either buy a new case or buy a faulty amp with a good case and use that.

PC cases are quite good because they look great and have lots of fitments for fans, PSU etc.
I usually strip out the power supply and use the mains socket on it.
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Old 13th July 2011, 01:58 AM   #1875
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Quote:
Originally Posted by nigelwright7557 View Post
I either buy a new case or buy a faulty amp with a good case and use that.

PC cases are quite good because they look great and have lots of fitments for fans, PSU etc.
I usually strip out the power supply and use the mains socket on it.
The case parts I posted in the pics are exactly that -- from a denon power amp. The trafo and top, bottom parts and insides including heatsinks. I could have used the front back and side panels but I don't want it to have denon on it or other writing, or unused holes where parts used to be.f

Posting from phone sorry.

I'm thinking wood with paint. I dojt know about skills with nice finishes.
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Old 13th July 2011, 07:04 AM   #1876
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Default I do not know too..all i know is to scratch surface using sandpaper and steel brush

and to apply chemical to attack metal and produce some effect (ferric chloride and 3 other chemical agents)... i know how to paint and produce ink and colours at home, how to apply varnish, how to prepare wood.... how to saw metal, how to produce holes in metal, how to bend metal...but this is all.

Compared with fótios (the king) i am very stupid related these things.

Watch what Horácio, a Brazilian did, looks paint.

regards,

Carlos
Attached Images
File Type: jpg dsc00406bv.jpg (145.6 KB, 287 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 13th July 2011, 12:25 PM   #1877
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I'm going to use some thin wood and make an enclosure to give me visual ideas and see how it looks. Then I will improve it.

Thanks.
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Old 13th July 2011, 12:29 PM   #1878
AndrewT is online now AndrewT  Scotland
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Quote:
Originally Posted by odysseybmx414 View Post
I like it.
Click the image to open in full size.
I don't like it.
What is the purpose of posting a 1280px by 768px, 274.92 kB (281,521 bytes) fuzzy pic?
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Old 13th July 2011, 12:31 PM   #1879
AndrewT is online now AndrewT  Scotland
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Quote:
Originally Posted by destroyer X View Post
Compared with fótios (the king) i am very stupid related these things.
you are not stupid.
Just admit you are not prepared to invest the time and resources in learning.
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Old 13th July 2011, 12:34 PM   #1880
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Why not use the case as is , but put a faux (fake) face on it.
I did a unit like that in which I covered the silver plastic face with veneer, only cutting the holes I wanted to keep.
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