[hpsdr] Penelope Toroids

Alan Hochhalter alanh137 at comcast.net
Sun Dec 27 20:45:44 PST 2009


I've got an unfinished Penelope board I'm trying to assemble.

I'm at the point where I am ready for the toroids, but have a question I 
hope someone can answer.

According to the Bill Of Materials, L8 and L3 are Amidon T30-6 cores.  
Since I have a pre-assembled Penelope, I can see those toroids are each 
5 turns. (not sure how you'd know that otherwise by the way unless you 
go through the calculations, have a board, or a photo to refer to)

The BOM doesn't list a supplier or part number for L5, so I'm trying to 
decide if it is the same core as L3 and L8.  The L5 core looks the same 
on my pre-assembled board as L3 and L8 except it has 6 turns which seems 
reasonable since it has a larger inductance value.  Since there aren't 
any numbers on the cores, I don't know if they're the same even through 
they look identical.

Can anyone enlighten me so I can make sure I've got the right cores?

Thanks,

Alan



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