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Old 24th February 2018, 01:32 AM   #1
DaMuffinMan is offline DaMuffinMan  United States
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Default End Bells for Triad C-14 X

I have been looking for some end bells for my Triad C-14 X choke and can't find any so I am going to make some. Would it be ok to drill holes through were the red dots are in this picture so I can put some bolts through them?
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Old 24th February 2018, 01:45 AM   #2
pblix is online now pblix  United States
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No, bad idea.
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Old 24th February 2018, 02:12 AM   #3
e_fortier is online now e_fortier  Canada
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End Bells for Triad C-14 X
Have you checked Edcor ? They sell some end bells.
Maybe you could hide this choke under the hood.
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Old 24th February 2018, 02:38 AM   #4
danFrank is offline danFrank  United States
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End Bells for Triad C-14 X
Mount it under the chassis if you don't like the looks of the choke.
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Old 24th February 2018, 03:09 AM   #5
DaMuffinMan is offline DaMuffinMan  United States
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Why is it a bad idea?
Edcor does not sell this size, I looked.
If i wanted to mount it under the chassis I wouldn't need end bells
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Old 24th February 2018, 04:08 AM   #6
DaMuffinMan is offline DaMuffinMan  United States
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Is this why some chokes don't have endbells?
"Not all transformers and chokes can be fitted, or need, endbells. For example, chokes and single-ended outputs are gapped, therefore endbells are not used because they will short the gap".
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Old 24th February 2018, 12:54 PM   #7
Tubelab_com is offline Tubelab_com  United States
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I took some end bells off a power transformer salvaged from a RF sweep generator and stuck them on a Triad choke. They worked fine. An electrical short across the gap doesn't matter. A magnetic short might, but the end bell material is thin and coated, so it might shunt some flux, but not that much. Many chokes and SE OPT's contain a mylar or paper spacer in the gap. It is important to retain the spacing of the gap, so don't mess with the spacer. Transfer the guts intact from the Triad sleeve to the end bells. Don't separate the sections.
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Old 24th February 2018, 04:17 PM   #8
pblix is online now pblix  United States
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Some cores already have the holes under the sheet metal bracket. Then, like George said, it's fine to remove the bracket and use end bells of the right size. These Triads don't seem to have the holes.

Quote:
Originally Posted by DaMuffinMan View Post
Why is it a bad idea?
Edcor does not sell this size, I looked.
If i wanted to mount it under the chassis I wouldn't need end bells
Try it and you'll see. Silicon Steel is hard and brittle.
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Old 24th February 2018, 09:02 PM   #9
Tubelab_com is offline Tubelab_com  United States
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Quote:
These Triads don't seem to have the holes.
I looked at a Triad C-17X choke that was sitting on my workbench and it has 4 holes in the corners. It must be about 5 years old. I opened the brand new one I just got from Mouser to match it....they are quite different, and the new ones indeed have no holes......so much for that idea.

The choke with the plastic bobbin is the new one.
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Old 25th February 2018, 12:03 AM   #10
DaMuffinMan is offline DaMuffinMan  United States
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Thanks for the input George would it be ok to drill holes in either of the places I've circled in this picture?
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