[SEDXC] All you ever wanted to know about WWV!

[Bill Barr]

Gang,

I copied this from the Top Band reflector.  This seems to have references to 
sites for not only WWV but for the UK time standard  transmitters as well. 
Just thought you might find it interesting.

73
Bill

> There is a quite detailed description of the WWVB 60 kHz transmitter at
> Fort Collins, CO at the site below. Their ERP is 50 kW. This power
> level is a bit lower than the highest power AM broadcast stations in
> the US (50 kW into a near half-wave vertical). I've never heard them in
> Chicago (roughly 1,000 mile path and a pretty high noise level), but my
> el-cheapo digital clock is able to synchronize to them.
>
> http://www.boulder.nist.gov/timefreq/stations/wwvb.htm
>
> All of the WWV HF transmitters run 10 kW into half-wave verticals that are
> one half-wave above ground. See
>
> http://www.boulder.nist.gov/timefreq/stations/wwv.html
>
> The WWVH HF transmitters (Hawaii) are comparable, except that most are
> directional to the west (two vertical towers phased to produce a
> cardioid pattern.
>
> http://www.boulder.nist.gov/timefreq/stations/wwvh.htm
>
> European long wave broadcasters use transmitters ranging from about 200 kW 
> to
> 3MW. Most antennas are 1/4 wave or less, but some use phased arrays. The 
> BBC
> station on 198 kHz, for example, runs 500 kW, at least one French station 
> runs 2
> MW, as do some stations in Eastern Europe.
>
> Long wave transmitters are able to cover long distances by ground wave, 
> because
> ground losses are much lower. It is well known, for example, that 5 kW on 
> 540 kHz
> has much more ground wave field strength at 100 miles than 50 kW on 1590 
> kHz over
> average soil.
>
> =   =   =   =   =   =


> Peter McGuire of Cadac Electronics, sent these excellent links re: long 
> wave in
> the UK:
>
> http://www.bbc.co.uk/reception/transmitters/radio_trans/medium_long_wave.shtml
>
> http://tx.mb21.co.uk/gallery/droitwich/droitwich-lf-data.asp
>
> http://www.subbrit.org.uk/sb-sites/sites/r/rugby_radio/index.shtml
>
> And this one that lists time standard transmitters:
>
> http://www.cl.cam.ac.uk/~mgk25/lf-clocks.html
>