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Old 13th July 2005, 06:49 PM   #1
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Default Transformer tape

I have recently removed the plastic covering on a toroidal transformer to replace the thermal fuse. What is the best tape to use to replace the clear plastic tape that has been removed?
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Old 13th July 2005, 08:57 PM   #2
cerrem is offline cerrem  United States
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This is one option...
http://www.kaptontape.com/polyimide_tapes_2mil.html

I prefer , electrical tape...like 3M high temp grade...I get it in a cool color like BLUE or RED...and wind it as the last layer...nice clean even overlaps....this tape is flexible...

Chris
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Old 13th July 2005, 09:11 PM   #3
Stocker is offline Stocker  United States
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Kapton is somewhat expensive but *very* well suited for transformer use. It should be available at any half-decent electronics supply.
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Old 13th July 2005, 11:07 PM   #4
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Default transformer tape

hi
use the good old masking tape. its cheap, tough, and water proof, and you can get tension on it

good luck
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Old 14th July 2005, 12:06 AM   #5
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Default Re: transformer tape

Quote:
Originally posted by amp builder jb
use the good old masking tape. its cheap, tough, and water proof, and you can get tension on it
What are you Brits using for masking tape? I can assure you that what we use on this side of the pond for painter's masking tape is not tough, not waterproof, does not hold tension well. And it has no business in electrical service, who even knows what temperature or voltage rating it would have!
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Old 14th July 2005, 12:24 AM   #6
SY is offline SY  United States
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Kapton can work very well, it has a great temperature rating, but it does have a tendency to tear VERY easily if nicked even slightly (plastics guys say "tear propagation"). So use it carefully. Mylar tapes should work just fine since the temps inside a transformer just aren't terribly high compared to Mylar's softening point. Mylar does not have the tear propagation issues of Kapton.
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Old 14th July 2005, 02:25 AM   #7
Stocker is offline Stocker  United States
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Default Re: Re: transformer tape

Quote:
Originally posted by leadbelly

it has no business in electrical service, who even knows what temperature or voltage rating it would have!
Not to mention that paper tape will catch fire alot sooner than, say, Kapton!


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Old 14th July 2005, 11:10 PM   #8
AndrewT is offline AndrewT  Scotland
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But the fumes from burning paper will be less toxic than cooking plastic giving more time to escape!
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Old 14th July 2005, 11:22 PM   #9
cerrem is offline cerrem  United States
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SInce this is being used for the outer wrapping...use ELECTRICAL TAPE..... Use the 3M stuff...just wind it neatly with tension and some overlap...it will be your best option....since this is a toroid...

Chris
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