tag:blogger.com,1999:blog-3380839830287420877.post6097886662518370789..comments2024-03-26T07:29:36.610-07:00Comments on VE7SL - Steve - Amateur Radio Blog: How Low Can They Go!Steve McDonaldhttp://www.blogger.com/profile/06229640265009249231noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-3380839830287420877.post-63796984803007461822019-05-25T19:59:02.018-07:002019-05-25T19:59:02.018-07:00Years ago a friend who was experimenting with whal...Years ago a friend who was experimenting with whale listening microphones sent me this interesting link... FWIW....<br /><br />http://www.vlf.it/kurt/elf.html<br /><br />Fast forward. Sharon Weinberger's recent "Imagineers of War" (history of ARPA/DARPA) mentions ELF and submarines. She gets it right despite some understandable technical misphrasings. What is amazing, and I am using the pre-Internet definition of "amazing" here, is how amateurs are using this band as amateur desire to: for sending their own messages. <br /><br />What I recall is "Sanguine" of the 60s. Popular science magazines of the time were talking about wiring up half the state of Wisconsin to transmit trivial ELF telegrams or EAMs. Poor soil conductivity was a reason for siting the ELF system in Wisconsin. <br /><br />We have a lot more of that kind of soil in Canada, and a transmitter in the Ontario-Quebec wilderness would have been less bothered by protesters. But AFAIK the Canadian Shield (hah!) was never offered to the U.S. Navy.<br /><br />-Dan VE7DESAnonymousnoreply@blogger.com