I run an FT-817ND, and I am looking into buying a straight keyer for it, so I can work CW. The problem I have is I don't know what to get, and if I do get it, do I have to construct my own connection wire? Ideally I would like to get the American Morse Equipment's KK1, but it doesn't list a connection device. The FT-817ND requires a 3-conductor jack. So where do I go to find all the materials I need to connect the key to the radio?