Hi, I just bought a like new whites goldmaster v/sat. It looks as though it has never been used. It comes with a 6 by 10 whites gold master coil. It looks like the original coil. Is this a DD coil? It does not indicate that on the coil or anywhere in the manual. I would like to buy a dd coil for it, but don't want to waste my money if that is already what I have. Any help greatly appreciated, thank you, Kidd