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Old 19th Nov 2018, 10:49 pm   #1
bikerhifinut
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Default Round pot to cover a toroid.

Has anybody got such a thing to sell or can point me to a UK based seller/manufacturer? The only ones I have seen online are in China and I am not quite sure about them.
What I need is a cover for a large mains toroid. An internal diameter of 150mm and height of 75mm will give sufficient clearance. I'd be looking to drill some ventilation holes in the top as I'll have some drilled around the perimeter on the chassis and inside the torus to help keep it cool.
I guess a rectangular (square) can will work just as well, in which case I need it 150mm square by 75mm high.
Finish isnt an issue as long as I can spray paint it to look neat.

Many thanks in advance.

Andy
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Old 20th Nov 2018, 8:50 am   #2
Electronpusher0
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Default Re: Round pot to cover a toroid.

I used the top cup off of a stainless insulated flask designed to hold soup or similar. The inside is plastic and has a plastic rim so no danger of shorted turns even if bolted through the middle.
I think it looks pretty good on my home built valve amp.
Not sure if they make them up the size you need however.

Just don't try and stick it down with silicon, it does not work as you can see....

Peter
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Old 20th Nov 2018, 3:18 pm   #3
Diabolical Artificer
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Default Re: Round pot to cover a toroid.

Several on ebay, all in China or the states. Several places here - https://www.diyaudio.com/forums/tube...r-cover-2.html and several ideas.

If you get stuck I could try making one for you.

Andy.
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Old 20th Nov 2018, 7:14 pm   #4
llama
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Default Re: Round pot to cover a toroid.

Maybe you could source (or sauce...) a cheap saucepan of the right size. I'm thinking The Range, Home Bargains, B&M etc.
Graham
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Old 20th Nov 2018, 10:38 pm   #5
kellys_eye
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Default Re: Round pot to cover a toroid.

You can get a set of 'simple' aluminium camping pans (nesting) that are very robust and good for this purpose.
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Old 21st Nov 2018, 8:58 pm   #6
bikerhifinut
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Default Re: Round pot to cover a toroid.

I have a set in the garage, I might see if they can paint up nicely. The hard part, assuming I can get a 150mm one would be making a neat bracket to bolt it down by.

Otherwise the toroid goes under the top plate, but ideally I'd like it on top.
A.
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Old 23rd Nov 2018, 1:19 am   #7
bikerhifinut
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Default Re: Round pot to cover a toroid.

Quote:
Originally Posted by Diabolical Artificer View Post
Several on ebay, all in China or the states. Several places here - https://www.diyaudio.com/forums/tube...r-cover-2.html and several ideas.

If you get stuck I could try making one for you.
Might take you up on that if I get stuck. Have you means to ACCURATELY cut down one of those ally cookpots so that its flush and square all the way round? I can easily take a hacksaw to one but goodness only knows what sort of dogs dinner I'd make of it.
I'm not very clever with metalwork unfortunately. Or wood work for that matter so I usually look for ways around.
I have one of those pots, nicely blackened by an over rich burning spirit stove but it'll clean up and a bit of work with a rattle can or 3 would get it matching the nice gold painted output transformer caps.

A.
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Old 23rd Nov 2018, 1:22 am   #8
bikerhifinut
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Default Re: Round pot to cover a toroid.

Quote:
Originally Posted by llama View Post
Maybe you could source (or sauce...) a cheap saucepan of the right size. I'm thinking The Range, Home Bargains, B&M etc.
I'll take a ruler in with me next time, that kind of appeals as maybe they do one in the hieght vs diameter I need. Assuming the handles are their usual easy to fall off variety.......
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Old 23rd Nov 2018, 8:19 am   #9
Diabolical Artificer
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Default Re: Round pot to cover a toroid.

"Have you means to ACCURATELY cut down one of those ally cookpots " depends how accurate or precise mate, to one or two thou I'd struggle, to a 1/32" or less is doable though, as is attaching fixing lugs.

A.
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Old 23rd Nov 2018, 12:34 pm   #10
bikerhifinut
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Default Re: Round pot to cover a toroid.

Absolute dimensions not a problem, 75mm or so depth needed, it's making a straight cut that I find hard so that it sits evenly on a flat top plate. I'll work summat out.
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Old 23rd Nov 2018, 4:41 pm   #11
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Default Re: Round pot to cover a toroid.

Quote:
so that it sits evenly on a flat top plate.
A happy hour with some wet and dry on a flat surface and gently gliding the cut edge over it.
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Old 23rd Nov 2018, 5:00 pm   #12
bikerhifinut
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Default Re: Round pot to cover a toroid.

And a big flask of coffee.............
yep i think theres a few good ways round this. Places like halfords sell windscreen trim for round the perimeter of motor bike screens. It simply pushes on. Its probably a standard edge trim. being slightly pliable it should take up any very small fluctuations and make a decorative finish round the base, and as its usually a plastic/rubber material it'll help to insulate and avoid a shorted turn along with insulation washers etc on the top nut.
Got enough to go on now thanks fellas.

A.
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