Hello all. I'm new to the list. I need a parallel port keying interface for my TS-520. I was thinking of using a circuit that does the same thing for my old CMOS Super Keyer kit. It can be found at http://home.att.net/~jacksonharbor/gridbsch.pdf. Can this circuit be used with the parallel port directly? If not, what mods need to be done? Thanks for the input. Kevin, NリRKX -- WWW: http://www.writelog.com/ Submissions: writelog@contesting.com Administrative requests: writelog-REQUEST@contesting.com Problems: owner-writelog@contesting.com