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Trying To Find True Mono For TDI


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Bill, I think the advantage was better coverage under the coil, especially for really small gold. You are correct about getting around the patent. Now we have the spiral-wound coils which accomplish the same thing. Apparently lots of ways to skin that cat. That said, I have both a 7 1/2DF, and a straight mono 8 x 6 Sadie, and can tell very little difference between them, though if I had to choose, I'd give the very slight edge to the DF, thoughit might be my bias showing...LOL

Jim

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I really like the 7 1/2" DF coil.  Its found me some nice items including a gold ring.

 

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