Toroidal transformer potting can

[jamesjung21]

Hi,

Does anyone know where I can find a round can for potting a toroidal transformer? I'm not planning to seal it with epoxy and leave plenty of ventilation holes on the bottom for heat generated.

I thought this is the most appropriate place to ask, because we are the ones who love to mount things on top of chassis 🙂

 

[benchtester]

I think you are on the right track, I did some mu-metal shields and then completely encapsulated them in epoxy. It was more trouble than it was worth.

For small toroids (<100 VA) I am looking at using speaker driver shields, either bought or salvaged. I, too, would be interested in a source for covers/shields for larger toroids (300 to 400 VA).

 

[jamayfie]

Speedy metals (https://www.speedymetals.com/default.aspx) will sell you a chunk of aluminum in many different diameters, thicknesses and whatever height you choose. It's an inexpensive fix if you have the flexibility to mount using a bracket or tiny bolts.

 

[Stixx]

I used a stainless steel outdoor cup as can for a transformer...but they only come in diameters up to about 10cm.

 

[dhaen]

These are only small...

VT4C

80mm (3.15") Diameter External, 70mm (2.76") diameter internally
50mm (1.97) Tall, 36mm (1.42") tall internally
Weight :315 (gram/Set)
Size (mm): 80 dia x 50 tall

An externally hosted image should be here but it was not working when we last tested it.

$12ea + shipping from Hong Kong

 

[Vek]

You can also get it here:

http://www.askjanfirst.com/

They have two versions, one made from metal (http://www.askjanfirst.com/kb/TRAZ10.jpg) and one made from polyamide (http://www.askjanfirst.com/kb/TRAZ20.jpg).

Greets

 

[AuroraB]

Re: These are only small...

An externally hosted image should be here but it was not working when we last tested it.

This must be a sure no-no

With the center thru-bolt it will create a shorted turn

 

[dhaen]

I don't believe the bolt is intended to touch the enclosure top...
Hopefully the top is a "push fit" onto the bottom.

 

[poynton]

there was a site in HK that had loads of transformer cans in various sizes - they were on Ebay listed as "chassis".

Typically, I cannot find the reference!!!

 

[jamesjung21]

VT4C

80mm (3.15") Diameter External, 70mm (2.76") diameter internally
50mm (1.97) Tall, 36mm (1.42") tall internally
Weight :315 (gram/Set)
Size (mm): 80 dia x 50 tall

I knew about the round can from VT4C.com but they are far too small to even fit a 20VA toroidal transformer.

You can also get it here:

http://www.askjanfirst.com/

They have two versions, one made from metal (http://www.askjanfirst.com/kb/TRAZ10.jpg) and one made from polyamide (http://www.askjanfirst.com/kb/TRAZ20.jpg).

Greets

I am trying to pot a 160VA or a 300VA and thought that http://www.askjanfirst.com/ as suggested by Vek, but shipping quote was unimpressive for a single plastic pot.

I used a stainless steel outdoor cup as can for a transformer...but they only come in diameters up to about 10cm.

I like that approach 🙂 Is there any other everyday life objects that can serve as a good looking potting can?

 

[SmarmyDog]

Cooking pots & pans?

 

[duderduderini]

How about tin cans

I use small coconut milk tins for shielding the tubes in my octal phono stage.. Some cans dont have the ribs and the join could be put to the back.
Just a thought.
p.s. Please remember to eat the contents of the can before potting

 

[jamesjung21]

Cooking pots & pans?

They are a bit too thick for potting, aren't they? Not to mention handles attached.

p.s. Please remember to eat the contents of the can before potting

😀

 

[duderduderini]

I wasnt kidding

Hi james
The tiin cans i speak of dont have handles and could be made to look alright.
How large is the tranny you want to pot?
Nick