About my Thoroid transformer...

[JW1977]

The plastic tape that covers the transformer, is it only there to protect the Windings?
Ive seen hifi transformers laying in a plastic "cup" and it was my intention to make one of these in my 3D printer and put the transformer in it.

Why then? The Cables needed som work so i had to take the plastictape off.

Is there any good reason that i shouldnt?

[john swift]

why did you need to work on the transformer ?

if you only wanted longer wires then I would of spliced extension wiring to the transformer

if you removed some turns from a winding to lower the output voltage
then I would replace the original tape with new heat resistant tape
eg
glass cloth electrical tape with thermosetting poly acrylate adhesive/ heat class F

Any 3D printed support needs to withstand the temperature the transformer runs at

your probably looking at a 3D plastic part that needs to be safe at 130 to 150 C
and not prevent the natural cooling of the transformer

John

[JW1977]

The rubbercoat of the wires was falling off so to fix this I had to take the tape off.
I just did a little research and found out that I could just buy one of these cups, they are made of metal.
I thought that if i put the cover on i dont have to rewind the protection tape.

[john swift]

OK , that makes sense renewing the old insulation
I would still replace the tape

Is this Mounting Disc the type of thing your looking out ?
https://uk.rs-online.com/web/p/mounting-kits/6719208/

using a Neoprene Disc
https://uk.rs-online.com/web/p/mounting-kits/6719211/

helps to even out the pressure on the transformer

just watch out you don't accidently form a shorted turn by
connecting the top metal mounting disk to the bottom disk or chassis

John

[Voicecoil]

Reasons toroids are potted in a plastic case include reducing audible hum (potting compound locks the windings solid) and because they may look smarter! - important for HiFi. To do it properly you need a vacuum potting chamber to drive the resin inbetween the turns of wire. If the primary winding is on the outside you'll need some kind of insulation when potting in a metal can to preserve the breakdown specification - better to have the secondary on the outside in such designs.

[JW1977]

Thanks for the info, i decide to go with the tape instead!

[JW1977]

Yes, i think im gonna go with that and skip the cover...
Sometime i read about how not to mount one of these transformers but i dont remeber now.
Would this be a bad way? The top metal disc would be connected to the cabinetchassis if i do it like this.