Hi Dave Have a look at this project http://www.btinternet.com/~dsergeant/rx.htm it's on my list of things to build someday At 01:18 26/10/2003, David Toepfer wrote: >Perhaps it's just gonna take some engineering on my part, but I was wondering >if anyone else has heard of or is curious about the idea of a VLF transverter >(usable on 73k, 136k, and 1750m). > >dt