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Old 3rd January 2013, 10:17 AM   #351
AJT is offline AJT  Philippines
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Quote:
Originally Posted by rolandong View Post
Cool Tony... those traffos popping out like daisy's...
you are responsible for shortage of 2" core and copper at deeco

Will be joining the party shortly as I have 4 pcs 200Watts output booster traffo EI core. Will be taking photos and exact measure of IE iron core in the next few days...
thanks rolandong......i have other sources too....
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Old 10th January 2013, 06:44 AM   #352
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Quote:
Originally Posted by Tony View Post
you need a bobbin sized for 1 3/4 centre leg stacked to 4 1/2.....
you can get around 1740 volt amperes out of this...
primary turns = 233 turns #16 AWG magnet wire
secondary turns @30volts = 30 turns #13 AWG magnet wire, 4 coils, two bifillar windings....
in my country, the standard is AWG, please take note of this as you may have a different one in yours...
hi tony,
i am very sorry for late construction,
i bought the gage wires what u mention,
i cant wind the whole wires inside the window, its popping out, so any solution?
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Old 10th January 2013, 05:45 PM   #353
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Quote:
Originally Posted by nazirdigi View Post
hi tony,
i am very sorry for late construction,
i bought the gage wires what u mention,
i cant wind the whole wires inside the window, its popping out, so any solution?
please post a photo of what you got so far...
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Old 10th January 2013, 11:25 PM   #354
AJT is offline AJT  Philippines
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Quote:
Originally Posted by nazirdigi View Post
hi tony,
i am very sorry for late construction,
i bought the gage wires what u mention,
i cant wind the whole wires inside the window, its popping out, so any solution?
as i said, wire gage numbers i use may not be the same as wire numbering used in India....

anyway, use wooden mallet to hammer out the bulge to make it fit, you can also use a table vise.....

Click the image to open in full size.

Click the image to open in full size.
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Old 11th January 2013, 12:48 AM   #355
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Tony,
Here is 4 booster output traffo I wanted to recycle.
Instead of throwing this out in a junk, I was inspired by your good thread to try as well. Core size is only 1 & 1/4". If combined by 2's I can get 3.5" stacked each.

Please help me estimate possible VA we could get, wire sizes (primary & sec) and number of turns for 24-0-24Vac secondary. Is it better to combine all EI core into 5-7" stack? Or can I possibly have 2pcs 600VA which I can use for small amp like F5?
Attached Images
File Type: jpg mytraffo1.jpg (189.6 KB, 183 views)
File Type: jpg mytraffo2.jpg (142.4 KB, 171 views)
File Type: jpg mytraffo3.jpg (121.2 KB, 169 views)
File Type: jpg mytraffo4.jpg (134.5 KB, 66 views)
File Type: jpg mytraffo5.jpg (95.7 KB, 68 views)
File Type: jpg mytraffo6.jpg (102.5 KB, 76 views)
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Old 11th January 2013, 07:22 AM   #356
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i will post image when my camera back soon from my friend,
i will try tony u suggested method.
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Old 11th January 2013, 07:36 AM   #357
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use wooden plates made of plywood about 1/2 inch thick on the coils, do not pound directly on the coils....also a wooden mandrel inside the bobbin to keep the dimensions okey....
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Old 11th January 2013, 07:38 AM   #358
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Quote:
Originally Posted by rolandong View Post
Tony,
Here is 4 booster output traffo I wanted to recycle.
Instead of throwing this out in a junk, I was inspired by your good thread to try as well. Core size is only 1 & 1/4". If combined by 2's I can get 3.5" stacked each.

Please help me estimate possible VA we could get, wire sizes (primary & sec) and number of turns for 24-0-24Vac secondary. Is it better to combine all EI core into 5-7" stack? Or can I possibly have 2pcs 600VA which I can use for small amp like F5?
1.25 CL x 3.5inch stack gives you about 595VA....
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Old 11th January 2013, 07:43 AM   #359
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If allowing losses and targetting for 500VA, please tell me what copper wire size for primary and secondary (48Vac) and number of turns.
Thanks in advance.
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Old 11th January 2013, 08:30 AM   #360
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Quote:
Originally Posted by rolandong View Post
If allowing losses and targetting for 500VA, please tell me what copper wire size for primary and secondary (48Vac) and number of turns.
Thanks in advance.
use my spreadsheet.
it is designed specifically for these kinds of questions.
everything is a variable.
http://johansense.com/bulk/spreadshe...merdesign1.ods
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