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Group buy: DCT03 DC trap (filter) for toroidal transformers
Group buy: DCT03 DC trap (filter) for toroidal transformers
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Old 26th October 2018, 05:51 AM   #121
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: DCT03 DC trap (filter) for toroidal transformers
Please contact me for info.
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/Per-Anders (my first name) or P-A as my friends call me.
My group buys Super Regulator group buy. 43 pcb's in interest. DCT03 group buy. 39 pcb's in order, 4 paid.
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Old 2nd November 2018, 12:08 PM   #122
Ralphien is offline Ralphien
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Join Date: Oct 2017
Finished my DC trap finally
Managed with a 50w iron but only just, used some hot melt glue between the caps to stop the board being bendy (saw someone else used it)
Found the right enclosure (see below)

It works on my power amp with the irritating buzzing toroid - excellent!
Thanks P-A
Dropbox - DCblocker1.JPG
Dropbox - DCblocker2.JPG
TW11-8-22B | TW ABS Enclosure, 220 x 110 x 75.3mm | RS Components
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Old 3rd November 2018, 11:58 AM   #123
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: DCT03 DC trap (filter) for toroidal transformers
It's correct that you'll need a lot of heat to solder 105 um copper and rather big parts. Personally I use a 135 W iron turned up to 400 deg C.
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/Per-Anders (my first name) or P-A as my friends call me.
My group buys Super Regulator group buy. 43 pcb's in interest. DCT03 group buy. 39 pcb's in order, 4 paid.
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Old 4th November 2018, 08:45 PM   #124
AmpUtator is offline AmpUtator  United States
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Join Date: Jun 2013
Location: Ohio
Group buy: DCT03 DC trap (filter) for toroidal transformers
Thanks Per-Anders for all your help with my first DIY project DCT03/Fo-Felix EMI filter. It's working perfectly .
Attached Images
File Type: jpg IMG_1086-2.jpg (266.0 KB, 259 views)
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Old 15th November 2018, 08:41 AM   #125
AmpUtator is offline AmpUtator  United States
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Join Date: Jun 2013
Location: Ohio
Group buy: DCT03 DC trap (filter) for toroidal transformers
Hi Per-Anders,

I've read your documentation on testing the DCT03, but I'm not sure if I need an oscilloscope or will a DMM work?
I've been using my DMM set to AC or DC volts, using either a 5VDC walwart or a 12VAC walwart but I'm not seeing 0.7, 1.4, 2.1 or 2.8 volts.

Also, my second DCT03 was built with CDE 380LX series caps, I hope those are okay, the EPCOS where out of stock at the time.

They do seem to be working okay I'm just not getting those numbers.

What am I doing wrong ?
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Old 17th November 2018, 12:41 AM   #126
shattered_dream is offline shattered_dream  Germany
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Join Date: Dec 2009
Quote:
Originally Posted by AmpUtator View Post
Thanks Per-Anders for all your help with my first DIY project DCT03/Fo-Felix EMI filter. It's working perfectly .
No problem with sparks?
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Old 17th November 2018, 07:48 AM   #127
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: DCT03 DC trap (filter) for toroidal transformers
AmpUtator, if you take a good picture of your DCT03 (both sides) I can tell you with rather high certainty that it will work.
__________________
/Per-Anders (my first name) or P-A as my friends call me.
My group buys Super Regulator group buy. 43 pcb's in interest. DCT03 group buy. 39 pcb's in order, 4 paid.
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Old 23rd November 2018, 08:42 PM   #128
AmpUtator is offline AmpUtator  United States
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Join Date: Jun 2013
Location: Ohio
Group buy: DCT03 DC trap (filter) for toroidal transformers
Quote:
Originally Posted by peranders View Post
AmpUtator, if you take a good picture of your DCT03 (both sides) I can tell you with rather high certainty that it will work.
Hi Per-Anders,

I built two DCT03's. The first unit uses CDE 380LX caps, (TDK's were out of stock) I hope the 380's are okay to use?
I briefly tested my DCT03/Fo-Felix build using an old receiver and didn't notice any problem.
Take a look at the photos and see if you think it looks okay.

After my enclosures are painted I'll test them both and see if I notice any sparks as mentioned by shattered_dream.
I did do a better soldering job on my second unit. I'll upload those photos later.

Thanks,
Attached Images
File Type: jpg Unit-1-1.JPG (376.7 KB, 165 views)
File Type: jpg Unit-1-2.JPG (209.1 KB, 160 views)
File Type: jpg Unit-1-3.JPG (301.0 KB, 158 views)
File Type: jpg Unit-1-4.JPG (249.7 KB, 160 views)
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Old 23rd November 2018, 08:55 PM   #129
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
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Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: DCT03 DC trap (filter) for toroidal transformers
It looks OK.
__________________
/Per-Anders (my first name) or P-A as my friends call me.
My group buys Super Regulator group buy. 43 pcb's in interest. DCT03 group buy. 39 pcb's in order, 4 paid.
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Old 23rd November 2018, 09:52 PM   #130
AmpUtator is offline AmpUtator  United States
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Join Date: Jun 2013
Location: Ohio
Group buy: DCT03 DC trap (filter) for toroidal transformers
Quote:
Originally Posted by peranders View Post
It looks OK.
Awesome. How about the second DCT03 with the TDK caps?
Attached Images
File Type: jpg Unit-2-1.JPG (376.4 KB, 57 views)
File Type: jpg Unit-2-2.JPG (221.3 KB, 40 views)
File Type: jpg Unit-2-3.JPG (308.8 KB, 41 views)
File Type: jpg Unit-2-4.JPG (278.3 KB, 27 views)
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