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Hi Folks,

I am proceeding to winding the L1, L2, L3 toroids for the LF kit.

I am having a time of it trying to wind the 117 turns for L1 & L3.

Is it OK to overlap the winding? I do not see any other way to get all those turns on those cores.

I have searched through the messages & files here and have not found much help.

What am I missing?

73, Kevin NZ1I

Hello Kevin,

?Tuesday, October 11, 2022

?Yes, just over wind the layers, it's the only way to get that many turns on them.


Best regards,
?Chris ? ?2E0ILY ? ? ??mailto:chris@...

Thank you Chris.

I was hoping it wasn’t a dumb question. This is the first kit I’ve built with that many turns on toroid. And of course previously, I would follow the non overlapping method of winding them. I just didn’t want to Assume and therefore my question.

Thank you again and 73,

Kevin NZ1I

If you would like to order the appropriate toroids from Amidon, I have
calculated numbers of turns for some different toroids which result in less
thruns being needed on each. These are the calculations:

L1, L3 - 68 turns on T37-3 core
L2 - 47 turns on T37-3 core
L4, L6 - 47 turns on T30-15 core
L5 - 22 turns on T30-15 core
L7, L9 - 33 turns on T30-15 core




On Wed, Oct 12, 2022 at 3:18 PM Kevin Gilot NZ1I <kevinemtid@...>
wrote:

Thank you Chris.

I was hoping it wasn’t a dumb question. This is the first kit I’ve built
with that many turns on toroid. And of course previously, I would follow
the non overlapping method of winding them. I just didn’t want to Assume
and therefore my question.

Thank you again and 73,

Kevin NZ1I

I think I hit "Reply" before I was done. This is all of them - toroids in
filters for the LF Softrock Ensemble II version:

L1, L3 - 68 turns on T37-3 core
L2 - 47 turns on T37-3 core
L4, L6 - 47 turns on T30-15 core
L5 - 22 turns on T30-15 core
L7, L9 - 33 turns on T30-15 core
L8 - 17 turns on T30-15 core
L10, L12 - 32 turns on T30-2 core (same as in design)
L11 - 17 turns on T30-2 core (same as in design)

These result in a lot less winding being done! Bottom LF performance seems
even a bit better than with the originals.

73, Zack W9SZ