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Old 6th August 2013, 05:32 AM   #651
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Join Date: Jun 2002
Location: 3RS
Suggest you visit the metal market where they sell metal sheets in retail , bare wires etc. They all seem to have thin copper sheets here. However the copper band is used only as an electrostatic shield. The inner non closed band between primary and secondary would effectively reduce noise coming in from the mains side. It will need to be connected to the ground scheme.
Do you guys really have so much trouble with noise on the mains ? Unless you are just trying to make the ultimate supply !
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Old 7th August 2013, 01:59 PM   #652
masood is offline masood  India
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Location: fatehpur
dear all,
where i get photo resist paper/stencil
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Old 7th August 2013, 03:31 PM   #653
yajnaS is offline yajnaS  India
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Quote:
Originally Posted by gmphadte View Post
Finding coper sheet for belly band may not be easy...
Where are you located ? Copper sheet is a standard product. You can buy it from the metals market, or you can buy it from the guys who supply the motor/transformer rewinding industry.

I don't understand why people are having trouble buying copper sheet.
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Old 7th August 2013, 06:10 PM   #654
Roushon is offline Roushon  India
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Join Date: Sep 2004
Location: Mumbai (Bombay)
Quote:
Originally Posted by yajnaS View Post
I don't understand why people are having trouble buying copper sheet.
That is because every one is trying to find it in diyaudio.com . One has to hit
the road which I am going to do in a couple of weeks and then post here the
address, telephone of the retailer....

Regards
Roushon.
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Old 8th August 2013, 10:54 AM   #655
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Join Date: Jul 2003
Location: Dona paula, Goa
I am from Goa and I can get all the brands(in the world) of liquors only. Rest all is 100s of kms away.

Anyhow, I just showed an easy place to get a copper sheet. I don't need any. Thanks for the help anyway.

Gajanan Phadte

Surprise info: Finding the enamelled wire is also a nightmare here...

Last edited by gmphadte; 8th August 2013 at 10:56 AM. Reason: added last line
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Old 8th August 2013, 11:30 AM   #656
masood is offline masood  India
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Quote:
Originally Posted by Roushon View Post
Gajanan, this is very interesting and thank you for exposing the truth to us.
I will definitely shield transformers in this way in the future.

Regards
Roushon.
dear roushan ji,
where can i get photo resist paper to draw pcb print.thanks
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Old 10th August 2013, 05:03 AM   #657
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I got SMD part from lamington road min qty 100 for resistors , capacitors Size: 0850 resistors qty-100 Rs. 25-30 (depends on the tolerence) capacitors qty-100 Rs.50-100 (depends on the value) ATmega16A qty-1 Rs. 150 Max232 IC qty-1 Rs. 40 (not very entertaining to hobbyist and student but few retailers for smd components you can find) SMD ELECTRO COMPONENTS 54-C Proctor Road , Jyoti Estate, Near Parijat Bldg , Off laminton Road Mumbai - 400 007 Tel - 5658 6555 mobile : 93242 11912 Email : smdelectro@gmail.com
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Old 12th August 2013, 04:37 AM   #658
Roushon is offline Roushon  India
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Join Date: Sep 2004
Location: Mumbai (Bombay)
Quote:
Originally Posted by mark28new View Post
I got SMD part from lamington road min qty 100 for resistors , capacitors Size: 0850 resistors qty-100 Rs. 25-30 (depends on the tolerence) capacitors qty-100 Rs.50-100 (depends on the value) ATmega16A qty-1 Rs. 150 Max232 IC qty-1 Rs. 40 (not very entertaining to hobbyist and student but few retailers for smd components you can find) SMD ELECTRO COMPONENTS 54-C Proctor Road , Jyoti Estate, Near Parijat Bldg , Off laminton Road Mumbai - 400 007 Tel - 5658 6555 mobile : 93242 11912 Email : smdelectro@gmail.com
Thank you very much for your post. It is exactly the
time I am looking for SMD and was thinking of searching
in LR, already asked Visha who did not have. Thanks
again for the definite source.

Roushon.
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Old 12th August 2013, 04:40 AM   #659
Roushon is offline Roushon  India
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Join Date: Sep 2004
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Quote:
Originally Posted by masood View Post
dear roushan ji,
where can i get photo resist paper to draw pcb print.thanks
Dear Masood,
I know you are looking for this for at least
two years now in this forum. I already told you before that
I use toner transfer method and have no idea about photo
resist method. You can ask Viki.

Best wishes
Roushon.
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Old 12th August 2013, 05:30 AM   #660
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Join Date: Jul 2003
Location: Dona paula, Goa
Many have tried ordinary thin paper as found in catalogues. Try some papers of different types. Who knows you might get lucky and we all can benefit from it.

You might need to touch up the gaps...try bow pen with enamel paint. Some prefer nail polish as it dries quickly.

Gajanan Phadte
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