Hi,
I have a ferrite transformer base with a gap in it. It was glued when I found it.
I thought about grinding dust from a scrap ferrite to create a glue.
Does such a glue already exists?
Thanks for your attention.
JPD
Hello there,
Ferrite dust and some medium like epoxy will not create a longer center leg. It will help, but what you will have created in effect would be a smaller gap, but still a gap. To get rid of the gap you have to use the very same material that the core is made of, and possibly have it oriented in the same magnetic direction as the original center leg. In other words if you had another exact core and could cut off part of the leg and join it perfectly with the original leg you want to alter then you would have effectively no gap. This would be very hard to do obviously. With the 'glue' you propose it will help but will still be a 'distributed' gap which will still be a gap, effectively less of a gap, but will still affect the construction significantly.
The other way would be to precision grind the outer two legs so as to remove the space when they are put back together. That takes some good machinery too though.
After all is said and done, probably the best bet is to hunt for a new core that has the specs you need.
Also, you may want to rethink losing the gap as this helps in some circuits, although that looks like a pretty large gap in that picture.