The only reason to use optical coupling is to isolate the computer ground from the K2 chassis (or use a fast relay to do the same thing).
If connecting the keyline from the computer to the K2 introduces additional noise during receive, add the optical coupling. 73, Don W3FPR > -----Original Message----- > > Thanks Joe! > > That's simple enough. Just about right for my level! :-) > > Is there any reason in practice to use optic coupling versus > direct keying? > I'm going to use it for a K2 and never ever going to upgrade to K2/100 > or using an amplifier. > > de Håkan > > > > Joe-aa4nn wrote: > > You can look at the pinout for LPT1 at > > http://www.k1ea.com/hints/lpt.htm > > Also look at the pictorial at http://www.n3fjp.com/ under CW-PC > > Interface. > > de Joe, aa4nn > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
