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Old 14th December 2012, 10:15 AM   #341
AndrewT is offline AndrewT  Scotland
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Tony,
I think I know what you are doing, But could you explain so that I and anyone else fully understands the tests you are applying?

Why does the spreadsheet have xlsx? What does that last x mean?

Please explain the plots and how to read the information in them.
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Old 14th December 2012, 10:06 PM   #342
AJT is offline AJT  Philippines
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i am using Office 2007 for the spreadsheet......i attached revised spreadsheet showing efficiencies at various primary currents...the short circuit testing is done with all secondaries shorted together, with the aid of a variac, the voltage is slowly increased until a specified current flows as registered in the ammeters, the voltage at which the specified current flows is basis for computing copper loss in watts, that is v x i........
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File Type: zip traffo testing.zip (10.0 KB, 37 views)
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Old 15th December 2012, 09:54 AM   #343
AndrewT is offline AndrewT  Scotland
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Once again, could you explain how to use or read this information?
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Old 15th December 2012, 10:41 AM   #344
AJT is offline AJT  Philippines
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i am building my database so i can compare losses between types of cores, soon i will be making the same dimensions and coils but will use higher grade type irons......

the core loss and copper losses can then be compared with a comparable traffo using better grade iron core materials...

the spreadsheet is self explanatory....
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Old 22nd December 2012, 02:12 AM   #345
AJT is offline AJT  Philippines
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Default a pair of 6C33 push-pull OPT's

just finished, took me 2 days from get go....
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File Type: jpg IMG_3743.jpg (409.3 KB, 306 views)
File Type: jpg IMG_3744.jpg (381.4 KB, 290 views)
File Type: jpg IMG_3741.jpg (474.5 KB, 278 views)
File Type: jpg IMG_3737.jpg (451.3 KB, 262 views)
File Type: jpg IMG_3736.jpg (466.2 KB, 171 views)
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Old 22nd December 2012, 02:19 AM   #346
AJT is offline AJT  Philippines
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more pics...
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File Type: jpg IMG_3735.jpg (425.4 KB, 162 views)
File Type: jpg IMG_3734.JPG (966.7 KB, 170 views)
File Type: jpg IMG_3733.jpg (390.4 KB, 84 views)
File Type: jpg IMG_3732.JPG (852.7 KB, 172 views)
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Old 1st January 2013, 03:19 PM   #347
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Hi Tony,
Those look Pro,lol Good job !
I haven't wound my first one yet but am thinking about buying some wire and getting started,lol.
Regards,
NS
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Old 1st January 2013, 11:04 PM   #348
AJT is offline AJT  Philippines
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Quote:
Originally Posted by noSmoking View Post
Hi Tony,
Those look Pro,lol Good job !
I haven't wound my first one yet but am thinking about buying some wire and getting started,lol.
Regards,
NS
yes, that is the reason i post, to get you out to doing your own OPT's....
Attached Images
File Type: jpg IMG_3807.JPG (821.0 KB, 91 views)
File Type: jpg IMG_3808.JPG (783.4 KB, 84 views)
File Type: jpg IMG_3811.JPG (801.4 KB, 91 views)
File Type: jpg IMG_3851.JPG (926.3 KB, 97 views)
File Type: jpg IMG_3852.JPG (780.2 KB, 81 views)
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Old 2nd January 2013, 12:26 AM   #349
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I'm envious ...
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Old 2nd January 2013, 09:55 AM   #350
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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...
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