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Enter to Win a Raspberry Pi 4 built into a compact keyboard! We'll be selecting the winner at the end of this month - click here for more information.
- Joined
- Dec 18, 2013
- Messages
- 5,178
Hi Trevor
Can you show us a picture of another one?
Adam
Can you show us a picture of another one?
Adam
Colin Mitchell
- Aug 31, 2014
- 1,416
- Joined
- Aug 31, 2014
- Messages
- 1,416
Try a fine blade to cut into the glue
The halves are glued together.
The ferrite is very fragile and would break easily into fragments if "hammered" .
I think the best way is heating the glue to its melting point and taking the halves apart(100 C or about ,with gloves or pliers-very light grip !)
You can heat with a hot-gun,an oven,soaking in boiling water etc.
good luck
PS.
How would you wind a transformer/coil without knowing the core's parameters?
The ferrite is very fragile and would break easily into fragments if "hammered" .
I think the best way is heating the glue to its melting point and taking the halves apart(100 C or about ,with gloves or pliers-very light grip !)
You can heat with a hot-gun,an oven,soaking in boiling water etc.
good luck
PS.
How would you wind a transformer/coil without knowing the core's parameters?
I do not have photo equipment at present to take a picture. The pot cores I have tried to open all seem to shatter, the glue is as strong or stronger than the ferrite.
The present one I would like to dismantle is out of a Kestral electric fencer and is used as a blocking oscillator with a germanium transistor. There is much corrosion the transistor has lost a leg and the coil is open circuit. I would like to rewind it with the same number of turns, thus I do not need to know the core's parameters. I do have an inductance meter if necessary.
I have not tried heating, that is perhaps the way to go, the bobbins seem to be plastic, perhaps nylon, and would not take kindly to be heated to more than 150 C.
Why do I have this obsession with mending old junk?
The present one I would like to dismantle is out of a Kestral electric fencer and is used as a blocking oscillator with a germanium transistor. There is much corrosion the transistor has lost a leg and the coil is open circuit. I would like to rewind it with the same number of turns, thus I do not need to know the core's parameters. I do have an inductance meter if necessary.
I have not tried heating, that is perhaps the way to go, the bobbins seem to be plastic, perhaps nylon, and would not take kindly to be heated to more than 150 C.
Why do I have this obsession with mending old junk?
Martaine2005
- May 12, 2015
- 4,949
- Joined
- May 12, 2015
- Messages
- 4,949
It's normally the wife that calls it junk. We normally call it repairable and never throw anything away!!
One mans junk is another mans gold....
Martin
Only a room full? I have two rooms plus a garage full of stuff that 'will come in useful one day'
I dismantle small SMPS ferrite transformers to rewind. How I do it is use an old Microwave oven, put the core in the oven & heat it up until the glue softens. I usualy use a time of about 2 min lots until the halves can be separated. This is hard on the Magnetron but I am using an old oven & have plenty of spare Magnetrons.
