Project ETI 566 - Enquiry directed to Carl-NC

[ZuMi77]

This enquiry is directed to Carl-NC.

In the ETI 566 project there are three coils for which we use P18/11 pot cores. To wind the coils we need a 30-34 SWG wire. On the P18/11 bobbin I could wind around 60 turns of 30 SWG wire; there wasn't enough space to wind 200 turns or more (two of the coils should have more than 200 turns.)

Any suggestions?

regards

[Pete61]

Something doesnt sound right.
The bobbin is supposed to have an area of 7mm wide X 3.5mm high for wire, ie 11 layers of 23T.
#30 swg is about 0.3mm dia and you're only getting 3 layers on.
Maybe you're doing it just by hand when it should be a neat "machine" wrap ie with a drill of some type.

[Baterista]

Hello zumi77, actually the wire gauge would be 34SWG, here in my country we use "AWG" which corresponds to 31AWG, I used 30AWG because I couldn't find "31", so I didn't use the 18/11 potcore, but rather a 23/17 (I couldn't find the 18/11, otherwise I probably would have used it). But if you use 34SWG wire, you can probably wind the 200 turns.

[Carl-NC]

I don't know anything about this project. But if you scramble-wound the bobbin you will lose some capacity, you may need to carefully layer the windings. If it still doesn't fit, use a smaller wire gauge.