About my Thoroid transformer...

[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]

Sorry i forgot to Reply with quote...

[john swift]

yes, the diagram in post 6 is the usual way to mount an open toroidal transformer

if its fitted in a low profile metal enclosure just make sure the lid can not touch the bolt head and form a shorted turn !

John

[JW1977]

yes, the diagram in post 6 is the usual way to mount an open toroidal transformer

if its fitted in a low profile metal enclosure just make sure it can not touch the bolt and form a shorted turn !

John

Feeling stupid now but, make sure what cant touch the bolt?
The chassis would be in contact with the screw by mounting it in it or am i missing something?

[john swift]

Any connection between the bolt head and the chassis will result in a shorted turn

but if its fitted in a low profile metal enclosure
then it may be possible for the top to be deformed and touch the bolt head if pressure is applied !



John

[JW1977]

Any connection between the bolt head and the chassis will result in a shorted turn

but if its fitted in a low profile metal enclosure
then it may be possible for the top to be deformed and touch the bolt head if pressure is applied !



John

How about the lower end? The nut will be in contact there right?

[john swift]

the lower end is OK as the chassis , bolt and top mounting disk don't form a complete turn around the toroidal core

its only when you close the loop by connecting the mounting disk to the chassis by a conductor outside the core

John