On Fri, 27 Jan 2017, Jeff Liebermann wrote:

On Fri, 27 Jan 2017 19:32:33 -0500, rickman wrote:

You don't notice them sort of like not noticing the galactic super
cluster we are in.

Kinda like distracted driving. You don't notice things until you run
into them.

Anyway, 900 MHz yagi antennas are kinda pedestrian. Getting something
to work at VLF frequencies is a real challenge. Incidentally, did you
know that the original plan was for WWVB to transmit on 20KHz instead
of 60KHz? 2.2% radiation efficiency at 20KHz:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4487279/#__sec8title
Almost what Tesla was trying to build.

For a long time, there was WWVL at 20KHz. References to that may have
been more common in the sixties than to WWVB, which seemed to get
attention in the seventies especially since it sent out time code.

References to WWVL seem to be mostly erased at this point.

Michael