AFN is the U.S. Armed forces radio network "Armed Forces Network" and
broadcast on USB upper sideband in voice. They use popular programming - a
lot of sport, relays from CBS and a lot of messages to the troops. They are
interesting to listen to.
They are situated on major bases around the world and their sideband
transmitters are usually only 3 to 10 Kw in power, making some of these
stations great DX catches.

See http://myafn.dodmedia.osd.mil/radio/shortwave/
For you to receive Diego Garcia in South Carolina you would have to consult
a sunset/sunrise map based on your location and Diego Garcia.
They transmit on 4319 Khz during their nightime which is about 1400 UTC to
0100 UTC. Then they switch to their daytime transmitter of 12,579 Khz from
0100 to 1400 UTC (approximate). Try sunset in South Carolina for the 4 Mhz
and sunrise at your QTH for the 12 Mhz

Sunrise and sunset at your home in South Carolina would give you your best
chance, and perhaps overcome the digital transmission that is interfering
with reception from Diego Garcia.

Good luck and have fun

--
John Plimmer, Montagu, Western Cape Province, South Africa
South 33 d 47 m 32 s, East 20 d 07 m 32 s
RX Icom IC-756 PRO III with MW mods
Drake SW8 & ERGO software
Sony 7600D GE SRIII
BW XCR 30, Braun T1000, Sangean 818 & 803A.
GE circa 50's radiogram
Antenna's RF Systems DX 1 Pro, Datong AD-270
Kiwa MW Loop
http://www.dxing.info/about/dxers/plimmer.dx

"jon" wrote in message
oups.com...
Greetings to All! I see so many posts about Diego Garcia and
understanding that it is a good DX catch I decided to give it a try
this PM here in South Carolina on 4.319 and received a strong signal.
What I heard was some type of digital transmittion. I do not have any
idea of what Diego Garcia transmits or what type of transmition to be
listening for. Can you tell me what to be listening for and a little
bio on the station? I would appreciate your info and time. Have a
great weekend! Jon in South Carolina.