On Sat, 25 Feb 2017, John Kasupski wrote:


I can remember when someone could post a radio-related question here and receive
a useful answer in a reasonably short time from one or more of the many people
here who were actually knowledgeable about shortwave radio.

Now, sadlly, there is instead a bunch of nitwits who seem to think someone may
have somehow gotten hold of five cruise missiles and plans to launch one at each
antenna site for the five WWV transmitters (one for each frequency) using the
coordinates given in the newsgroup as targeting data. Pathetic!

WWV antenna coordinates (WGS84):

2.5 MHz - 40°40'55.0 N, 105°02'33.6 W
5 MHz - 40°40'41.9 N, 105°02'27.2 W
10 MHz - 40°40'47.7 N, 105°02'27.4 W
15 MHz - 40°40'44.8 N, 105°02'26.9 W
20 MHz - 40°40'52.8 N, 105°02'30.9 W

This information appears in NIST Special Publication 250-67, which was released
in 2005 and has complete info on WWV as well as on WWVH and WWVB - including
site maps and photographs. It can be freely downloaded in Portable Document
Format (PDF) from the following URL:

http://tf.nist.gov/timefreq/general/pdf/1969.pdf

My apologies to the OP for not posting this sooner. I honestly thought somebody
else would have finally gotten around to doing so by now, but apparently there's
an unfortunate lack of well-versed real radio hobbyists around here these days.

But 25MHz is back, a few years ago someone did some figuring and decided
it could be done without any real cost increase, and they resurrected it
as a test, and then kept on going.

Michael

On Sat, 25 Feb 2017 12:17:20 -0500, Michael Black wrote:

But 25MHz is back, a few years ago someone did some figuring and decided
it could be done without any real cost increase, and they resurrected it
as a test, and then kept on going.

Michael

Well, I just learned something! You're right...NIST's website says it's an
experimental broadcast and may be interrupted or suspended without notice, but
they're putting 2500 watts into the original vertical half-wave dipole located
at the coordinates 40 deg. 40' 50.5"N, 105 deg. 02' 26.6" W. Apparently when
they first went back on the air they were using the broadband monopole that
serves as the backup antenna for WWV's 2.5 MHz transmitter and feeding it only
1000 watts, but they decided to keep that antenna for WWV's backup 2.5 MHz
transmitter and rebuilt the original vertical dipole, which had been converted
to a backup antenna for 15 MHz. Once they did that, they cranked the transmitter
back up to its full rated 2.5 kW output.

I guess the vertical dipole has a lower angle of radiation than the monopole
did, too Good - it'll take fewer hops to get here if 25 MHz ever opens up to my
neck of the woods!

Thanks for your post, Michael. I haven't necessarily kept current on everything
since leaving PopComm, and so I missed hearing about this until now.

John D. Kasupski
Niagara Falls, NY