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Ursus trotter mixer repair UT-Klot400p

hEljAk

New Member
Ursus trotter mixer repair UT-Klot400p

Hi everyone!
Let me start by saying i have absolutelly no experience in what i am about to do right now.

We got an old Ursus Trotter mixer, that went bad some time ago, so i decided to check wth is wrong with it. And after i succesfully managed to open that thing.
I find this little thing
UT Mixer.png
that had one of the legs shorter in length.
So i got myself a Electric soldering iron kit 30w, some solder 50/50 and some soldering paste. And try to solder the shorter leg.
I managed to do so, but i am worried that it wont last very long.

I was wondering if some of you guys could help me figure it out which component is the one pointed by the green arrow.
So i can buy a replacement and try again.

Thx!
 

rjenkinsgb

Well-Known Member
Most Helpful Member
It's an inductor, made using a multi-hole ferrite bead with three turns of tinned copper wire through it.


Functionally, they are electrical "noise filters" to reduce the emitter radio noise caused by the motor commutator sparking, and not anything that can fail or cause a problem, other than the connections breaking.

You could bypass it with no effect on how the machine worked, though technically it could start to cause radio interference when in use.. They are fitted to allow it to comply with EMC (interference) regulation.

Or if you can find some singe strand copper wire the same thickness, you could replace the wire yourself to give longer ends & make it easier to refit; or unthread the short end to get more free wire and just leave two turns through it.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
It's almost completely unknown for such filters to fail, it's just a few turns of wire - unless it's been mechanically damaged, but there seems no sign of that?.
 

hEljAk

New Member
It's an inductor, made using a multi-hole ferrite bead with three turns of tinned copper wire through it.


Functionally, they are electrical "noise filters" to reduce the emitter radio noise caused by the motor commutator sparking, and not anything that can fail or cause a problem, other than the connections breaking.

You could bypass it with no effect on how the machine worked, though technically it could start to cause radio interference when in use.. They are fitted to allow it to comply with EMC (interference) regulation.

Or if you can find some singe strand copper wire the same thickness, you could replace the wire yourself to give longer ends & make it easier to refit; or unthread the short end to get more free wire and just leave two turns through it.
Thx very much! I think i will go for the new one and try my way with it.
It's almost completely unknown for such filters to fail, it's just a few turns of wire - unless it's been mechanically damaged, but there seems no sign of that?.
The impression I got was a dry joint due to vibration..
Altho the shorter leg it seemed a bit burned at the time. The pcb looked just fine.
So i also think it must have being the vibration or maybe a fall.

Thx egain for your help!
And sorry for my bad english.
 

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