David wrote:
http://www.fybush.com/sites/2005/site-051021.html

In 1949, the station (by now using the calls KNBC) replaced one of the
old towers with a 550-foot guyed tower, the same one that's still in
use 56 years later as the main tower. This is a most interesting tower
for several reasons: first, it's unusually short for a class I station
on 680... and second, because it's got an insulator about two-thirds
of the way up the tower.

Yes, it's a sectionalized tower - and one with a top hat on the upper
section, to boot, to give the tower a little more electrical height in
lieu of the physical height it couldn't achieve because of the nearby
San Francisco International Airport.


David - Today that would be KNBR AM Radio 680 kHz ~ RHF
- - - Former Call Signs were KPO and KNBC
KNBR = http://www.knbr.com/
HISTORY = http://en.wikipedia.org/wiki/KNBR#History
http://www.bayarearadio.org/schneider/kpo.shtml
http://www.bayarearadio.org/schneider/radio002.shtml
http://www.radio-locator.com/cgi-bin...=knbr&sr=Y&s=C
http://www.radio-locator.com/cgi-bin...atus=L&hours=U
http://www.fcc.gov/fcc-bin/amq?list=0&facid=35208
http://maps.google.com/maps?f=q&hl=e...(KNBR-AM)&om=1
http://maps.google.com/maps?f=q&hl=e...6,0.010729&t=k
KNBR operates a Franklin style Antenna, designed to reduce fading.
http://www.oldradio.com/archives/stations/ccs.htm
http://users.adams.net/~jfs/radio095.htm
http://users.adams.net/~jfs/radio019.htm
http://users.adams.net/~jfs/knbctwr2.htm
http://users.adams.net/~jfs/bakertwr.htm
More Photos = http://users.adams.net/~jfs/fotoarch.htm