I'm going to try the Slim Jim method (pipe or 300ohm), suggested by the list a little while ago, to see if it extends the range of a 433MHz data transmitter. Present range is about 100m+ with a 1/2 wave heavy-gauge copper wire http://www.hamuniverse.com/slimjim.html http://www.hamuniverse.com/2meter300ohmslimjim.html On those pages it shows both conductors of coaxial connecting to the Slim Jim. I understand that the core would be connected to the aerial, but where does the braid fit in ? The transmitter I use has an antenna output, which would be the core of the coax. Does the braid connect to the transmitter ground or what ? It seems to me that would just short the transmitter output. Do the radios this is intended for differ to what I'm thinking of ? 433MHz is about 69cm. Any suggestions re comparison to 2m ? TIA -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist