All Frequency Database Index is here: http://sites.google.com/site/somaliaamateurradio/somaliaphotos10
High Frequency radio Communications and Emissions.
HF Amateur Radio.
HF Aircraft radio.
HF Broadband Internet on Power Lines (BPL).
Short wave radio Communications and Emissions.
Short wave Amateur Radio.
Short wave Aviation radio.
Short wave Broadband Internet on Power Lines (BPL).
Communications and Emissions.
Frequency (Short Wave) communications stations and HF emissions.
Frequency radio communications stations and other HF radio emissions are here.
Wave radio broadcast stations, clandestine radio and pirate radio are in the
3 – 30 MHz.
3 MHz – 30 MHz.
3000 – 30000 kHz.
3000 kHz – 30000 kHz.
3000000 Hz – 30000000 Hz.
0.003 – .03 GHz.
0.003 GHz – .03 GHz.
to Short Wave SW DX, the hobby of listening to distant High Frequency HF radio
communications stations, utility radio stations, space radio communications and man made radio emissions.
HF Radio Communications stations and emissions.
Astronomy and natural radio emissions between 3 MHz and 30 MHz.
Short Wave SW radio from 3 MHz – 30 MHz.
3 MHz – 30 MHz.
Frequency (HF) radio signals have Short Wave (SW) lengths called Decametric waves.
hobby of Radio Astronomy on Short Wave radio.
hobby of Listening to Short Wave radio signals reflected by the Moon.
hobby of Listening to radio signals from outer space.
hobby of Listening to radio signals from space satellites.
hobby of Listening to Short Wave space radio communication.
hobby of Listening to Short Wave radio emissions from the Universe.
hobby of Listening to Short Wave BPL DX.
hobby of Long distance Short Wave BPL Broadband Internet on power line
hobby of Listening to OHR DX.
hobby of Long distance Short Wave OHR Over- the- Horizon Radar signals
hobby of Listening to military radio stations on short wave radio.
hobby of DXing Army, Navy and Air Force communications on Short Wave radio.
hobby of Radio Beacon DXing.
hobby of Long distance radio Beacon listening.
hobby of aircraft DX radio listening.
hobby of Long distance Aircraft radio listening.
hobby of marine DX.
hobby of Listening to Long distance ship communications.
hobby of Listening to Short Wave amateur radio communications.
hobby of Short Wave Ham Radio DX.
hobby of Long distance Short Wave amateur radio station listening.
hobby of Long distance Short Wave Amateur Radio station transmitting.
hobby of SW CB Radio DX.
hobby of Long distance Short Wave CB radio listening.
hobby of Long distance Short Wave CB radio transmitting.
hobby of SW time signal radio DX.
hobby of Long distance Short Wave time signal radio listening.
hobby of SW utility radio station DX.
hobby of Long distance Short Wave utility radio station listening.
Astronomy on HF.
DX is long distance High Frequency radio listening.
DX is long distance High Frequency radio hunting.
DXer is a long distance High Frequency radio listener.
DXing is the searching for long distance High Frequency radio signals.
to Short Wave radio DX.
to long distance communications on Short Wave radio.
to long distance communications on VLF radio.
to long distance communications on LF radio.
to long distance communications on MF radio.
to long distance communications on SW radio.
to long distance communications on VHF radio and VHF TV.
to long distance communications on UHF radio and UHF TV.
to long distance communications on SHF radio.
to long distance communications on EHF radio.
to HF radio.
to High Frequency radio.
Frequency radio is a
proven technology serves today’s wireless emergency communication preparedness
The inherent benefits of HF
technology are Long range communications capability, no infrastructure
requirements and low cost of ownership.
HF radio provides command and
control, secure communications and ease of operation.
HF radio handset has the look and
functionality of a mobile telephone.
HF radio is transportable for “on
the go” communications.
HF radio has flexibility to
accommodate various communication requirements and interoperability.
Frequency radio in the Australian outback (and other remote locations around
National 4 Wheel Drive Radio Network.
National 4 WD Radio Network.
VKS-737 Network provides services
in conjunction with state emergency service organisations 24 hours a day, 7
days a week via 10 High Frequency Base Radio Stations strategically located around Australia.
causes long distance HF communications?
is long distance HF communications possible?
is long distance radio communications possible?
causes long distance radio communications?
can you communicate long distances without using wires?
can you communicate long distances without using coaxial cables?
can you communicate long distances without using fiber optic cables?
can you communicate long distances without using fibre optic cables?
can you communicate long distances without using a telephone?
can you communicate long distances without using telephones?
can you communicate long distances without using the Internet?
can you communicate long distances without using a satellite?
can you communicate long distances without using satellites?
signal reflection off the Earth’s Ionosphere.
Ionosphere is 50 km to over 500 km above the Earth’s surface.
Ionosphere is 30 miles to over 300 miles above the Earth’s surface.
regions of the Ionosphere.
and loss of electrons in the Ionosphere.
variations in the Ionosphere.
in the Ionosphere.
in the Ionosphere due to the 9 to 14 year solar cycle.
in the Ionosphere due to the 11 year sunspot cycle.
in the Ionosphere due to seasons.
in the Ionosphere due to latitude.
variations in the Ionosphere.
in the Ionosphere in the absorption of radio signals.
Sporadic E unpredictable ion formations in the Ionosphere.
F irregularities in the Ionosphere that scatter radio waves.
frequency limits of Sky waves.
is the Maximum Usable Frequency (MUF)?
wave hop lengths. Radio wave reflection lengths. Radio wave refraction lengths.
different Propagation modes. The different ways that the movement of a radio
wave is affected by the ionosphere.
3 variables in HF radio propagation via the Ionosphere is frequency, path
length and antenna elevation angle.
is the Skip zone?
causes a radio signal to jump over areas and not be heard?
causes a radio signal to fade?
noise and Atmospheric noise.
from space can pass from above the Ionosphere down to the Earth’s surface only
on the highest HF frequencies so that this is where Galactic noise from our
Galaxy can be heard.
similarity of propagation on VHF (the frequencies above 30 MHz) and on 27 MHz
which is a HF frequency band close to the start of the VHF band. VHF and 27 MHz
HF line-of-sight communications distance depends on the height of the antenna.
the Medium Frequency (below 3 MHz band) ground wave distance does not depend on
antenna height because signals follow the curvature of the Earth. On the
frequencies around 2 MHz a winter midday distance of 500 nautical miles is
possible using 100 Watts where as the ground wave distance at the same time on
8 MHz would be only 150 nautical miles. Remember we are discussing ground wave
and not Ionosphere sky waves. Ground wave is not dependant on the height of the
antenna but is dependant on the transmitter power.
Universal Time system is used during HF communications.
Sun can cause solar disturbances that include Short Wave Fade outs SWFs affecting
mostly the lower HF frequency bands such as 5 MHz making it necessary to use
the higher HF frequencies.
Cap Absorption Events (PCAs) create very high absorption in the ionosphere D
Storms affect the higher HF frequencies making it necessary to use lower HF
Click to download - HF RADIO COMMUNICATIONS.
Frequency Amateur Radio.
Radio on HF.
radio stations are individual citizens in every country of the world who
communicate and experiment with radio transmitters and radio receivers. You can
hear some amateur radio stations on Short Wave radio.
Short wave radio.
Short wave radios.
Wave Radio Receivers.
KITS FROM EUROPE.
HOBBY OF BUILDING YOUR OWN TRANSMITTER AND RECEIVER.
hobby of listening to people that are using home built transmitters and
amateurs can buy or build hobby two way communication radio stations.
Build a SSB (Voice) and CW (Morse code) RADIO
RECEIVER for Euro 75 ($105).
is radio receiver kit covering 100 kHz to 7.5 MHz for reception of SSB and CW
conversion 100 kHz to 7.500 MHz radio receiver kit EUR 75.
Build a Morse code (CW) RADIO TRANSMITTER for Euro
5 Watt 3.5 MHz and 7 MHz Morse code transceiver kit
with no coils to wind.
transmitter can work with the JUMA-RX1 receiver or any other receiver.
transmitter frequency can be tuned in 10 Hz, 100 Hz, 1 kHz and 100 kHz steps.
JUMA-TX1 kit 98 EUR
Build a CW TRANSCEIVER KIT for Euro 155 ($219).
code HF transceiver (transmitter with built-in receiver) for the 3.5 MHz and 7
MHz bands based on the JUMA-RX1 radio receiver and the JUMA-TX1 radio
power output is 5 watts.
consumption for the Receiver RX is 60 mA, Transmitter TX is 1.2 Amps.
are 3.5 MHz and 7 MHz ham bands
and DSB transmit modes
filters 2.4 kHz for SSB (Voice) and 900 Hz for CW (Morse code).
graphical output indicator displayed.
graphical reverse power indicator displayed.
(Receiver Independent Tuning, clarifier, fine tuning).
Morse code side tone allows you can hear your Morse code as you transmit.
in keyer (JUMA-KEYER 1).
coils need to be wound when constructing this transceiver.
JUMA-TRX1 kit 155 EUR
Build a SSB AND CW TRANSCEIVER KITS for Euro 451 –
Euro 565 ($635 - $797).
transceiver kit transmits on ham bands
from 1.8 MHz – 30 MHz and has a general coverage receiver 100 kHz – 30
transceiver kit transmits on the 3.5 MHz and 7 MHz amateur radio bands with
receiver from 2 MHz – 8 MHz.
modes are LSB, USB, CW and tune.
samples online include nice AM reception.
JUMA TRX2 3.5 MHz and 7 MHz 2 band 10 Watt SSB voice and CW Morse code
transceiver kit is Euro 451.00.
JUMA TRX2 100 kHz – 30 MHz receive, 1.8 MHz – 30 MHz all ham radio band
transmit 10 Watt SSB voice and CW Morse code transceiver kit is Euro 565.00.
Specifications for the TRX2A and TRX2 SSB and
CW radio transceivers.
List of JUMA Community hams that are willing to
build a JUMA radio for you.
This constructing help is intended for the Juma kits and for personal use only.
the listed radio hams are competent and friendly people.
is neither fixed charge nor certain delivery time.
All the details are agreed with the builder.
amateur radio operator around the world who would like to be added to this list
is welcome to make contact.
a 1 transistor transceiver.
transistor radio transceiver.
1 transistor short wave radio transceiver.
transistor transmitter and receiver.
transistor radio transmitter and receiver
In the USA One
transistor transceivers make 2-way radio contacts across North America using 75
milliwatts and receives Europe on 3.5 MHz.
diagram of a 1 transistor transceiver.
1 transistor receiver and transmitter.
KITS FROM THE USA.
a 400 Watt output class E AM transmitter for 1.8 MHz and 3.8 MHz (29 January
E Boards and Part Kits for building the 400 Watt output class E AM transmitter
for 1.8 MHz and 3.8 MHz.
to Amateur Radio.
to Ham Radio.
Radio frequency allocations.
time map showing world wide radio conditions on 28 MHz.
happening now in the 10 metre band.
happening now in the 10 meter band.
Radio in Africa.
Radio in Algeria.
Radio in Angola.
Radio in Ascension
Island (See Saint Helena).
Radio in Benin.
Radio in Botswana.
Radio in Burkina
Radio in Burundi.
Radio in Canary
Radio in Cameroon
Radio in Cape
Radio in Central
Radio in Chad.
Radio in Comoros.
Radio in Congo
DRC (Democratic Republic of Congo).
Radio in Congo
Republic (Republic of Congo).
Radio in Cote
d’Ivoire (See Ivory Coast).
Radio in Djibouti.
Radio in Egypt.
Radio in Equatorial
Radio in Eritrea.
Radio in Ethiopia.
Radio in Gabon.
Radio in Gambia
(Republic of the Gambia).
Radio in Ghana.
Radio in Guinea
(Republic of Guinea).
Radio in Guinea-Bissau.
Radio in Ivory
Radio in Kenya.
Radio in Lesotho.
Radio in Liberia.
Radio in Libya.
Radio in Madagascar.
Radio in Madeira.
Radio in Malawi.
Radio in Mali.
Radio in Mauritania.
Radio in Mauritius.
Radio in Mayotte.
Radio in Morocco.
Radio in Mozambique.
Radio in Namibia.
Radio in Niger.
Radio in Nigeria.
Radio in Reunion
Radio in Saint
Helena (St. Helena).
Radio in Sao
Tome and Principe.
Radio in Senegal.
Radio in Seychelles.
Radio in Sierra
Radio in Somalia.
Radio in Somaliland.
Radio in Rwanda.
Radio in South
Radio in Sudan.
Radio in Swaziland.
Radio in Tanzania.
Radio in Tristan
da Cunha (See Saint Helena).
Radio in Togo.
Radio in Tunisia.
Radio in Uganda.
Radio in Western
Radio in Zambia.
Radio in Zimbabwe.
base of Amateur Radio in Africa is here:
Frequency Aviation radio.
HF Aeronautical frequencies.
HF Aircraft frequencies.
HF Airport frequencies.
HF Frequencies for Aircraft.
HF Frequencies for Airports.
HF Aviation frequencies.
HF Frequencies for Aviation.
HF Aeronautical frequencies.
HF Frequencies for Aeronautics.
HF Air travel frequencies.
HF Frequencies for air travel.
HF Air frequencies.
HF Frequencies for Air.
Aero radio frequencies.
HF Aeronautical radio frequencies.
HF Aircraft radio frequencies.
HF Airport radio frequencies.
HF Frequencies for Aircraft radio.
HF Radio Frequencies for Aircraft.
HF Radio Frequencies for Airports.
HF Radio Aviation frequencies.
HF Aviation Radio frequencies.
HF Radio Frequencies for Aviation.
HF Radio Aeronautical frequencies.
HF Radio Frequencies for Aeronautics.
HF Air travel Radio frequencies.
HF Radio Frequencies for air travel.
HF Air Radio frequencies.
HF Radio Frequencies for Air.
hobby of listening to Aircraft radio.
Aircraft radio frequencies.
Frequency Aircraft radio.
Aircraft radio frequency bands in kHz and MHz.
Aircraft radio frequencies in kHz and MHz.
kHz – 3025 kHz, 2.850 kHz – 3.025 MHz.
kHz – 3500 kHz, 3.400 kHz – 3.500 MHz.
kHz – 4700 kHz, 4.650 kHz – 4.700 MHz.
kHz – 5680 kHz, 5.450 kHz – 5.680 MHz.
kHz – 6685 kHz, 6.525 kHz – 6.685 MHz.
kHz – 8965 kHz, 8.815 kHz – 8.965 MHz.
kHz – 10100 kHz, 10.005 kHz – 10.100 MHz.
kHz – 11400 kHz, 11.275 kHz – 11.400 MHz.
kHz – 13360 kHz, 13.260 kHz – 13.360 MHz.
kHz – 17900 kHz, 17.900 kHz – 17.900 MHz.
kHz – 22000 kHz, 21.924 kHz – 22.000 MHz.
hobby of listening to long distance aircraft radio communications.
of VOLMET (meteorological information
for aircraft in flight) aviation broadcast stations. Click on the Short
Wave MHz band and see the VOLMET list.
Data base of passenger airliners, cargo airplanes, business
jets, helicopters, private aircraft, civil aircraft and military aircraft
photos of planes you can hear on the radio.
base of Aircraft radio selcal (radio selective calling) used by aircraft in
short wave radio communications.
base of airplanes lost in crashes and disasters
that you may have been listening to on your radio.
forum about the hobby of aircraft monitoring.
Listening to Aero Radio forum.
starting in Short Wave Listening forum.
to AM broadcast band forum.
to HF Amateur Radio forum.
to HF Marine Radio forum.
to Military Radio forum.
more in 19.1 (VHF Aircraft radio).
Broadband internet over Power lines.
Frequency Broadband over Power lines.
Internet on Power Lines.
Frequency Broadband Internet on Power Lines.
Man made radio emissions from power lines.
Broadband Power line DXing.
to the hobby of listening to radio emissions over long distances from
electricity power lines.
Power line in Australia.
United Kingdom (UK).
in the UK.
Power line in the UK.
of BPL heard on short wave radio.
of Broadband Power line heard on short wave radio.
online to BPL on these short wave radio frequencies:
– 4800 kHz, 4.700 – 4.800 MHz.
– 6000 kHz, 5.900 – 6.000 MHz.
– 9500 kHz, 9.400 – 9.500 MHz.
– 11600 kHz, 11.500 – 11.600 MHz.
– 13600 kHz, 13.500 – 13.600 MHz.
– 15100 kHz, 15.000 – 15.100 MHz.
– 17550 kHz, 17.450 – 17.550 MHz.
– 25700 kHz, 25.600 – 25.700 MHz.
in the USA.
Power line in the USA.
in the US.
Power lines in the US.
hobby of BPL DX listening is based on the ability of radio signals on power
lines to radiate at great distances.
knowledge was the reason for a court action by the American Radio Relay League
(ARRL) against the USA radio licensing and radio regulations authority the FCC
(Federal Communications Commission) in 2008.
ARRL asked how it was possible for the expert radio licensing and radio
regulations authority in the USA (the Federal Communications Commission FCC) to
make decisions based on statements which contradict the established ability of
BPL to radiate radio waves along overhead electricity power lines and result in
the cause of radio frequency interference to radio communications stations and
25 April 2008 the US Court of Appeals for the District of Colombia Circuit
found that the FCC prejudice had tainted the (BPL allowable radio radiation
level) rulemaking process.
court observed that there is no precedent allowing an agency (example the FCC)
to “cherry pick” (you cannot accept the parts of a report that you like and
edit out the parts that you don’t like in) a study on which it (the FCC) has
chosen to rely in part.
Court ordered the Federal Communications Commission (FCC) on remand, to release
the unredacted (unedited, in full) studies and provide a reasonable opportunity
for public comment.
ARRL applied to the FCC for the release of those documents under the USA
Freedom of Information Act.
to the court case a similar request from the ARRL for an unedited release had
been refused by the FCC.
time the FCC agreed after a new FCC leadership had been installed.
ARRL compared the earlier disclosed (edited, redacted, selective) FCC documents
to the unedited original documents.
the edited and unedited documents were released because of ARRL requests under
the USA Freedom of Information Act.
took this action because what FCC had said was different to what BPL radio
listeners had long established through years of monitoring BPL radio emissions
from distant power lines.
In the July 2009 QST ARRL magazine page 9, the
American Radio Relay League (ARRL) editorial titled “Now We Know” concluded
that “before adopting it’s (FCC) flawed BPL rules (to minimize radio
interference from BPL systems), the FCC knew that a 20 db notch (the level of
reduction in radio radiation from power lines) is insufficient to protect
mobiles (mobile radio operators in the area of power lines) from interference.
The FCC knew that BPL is not a point source emitter (radiation takes place
along the entire power line and not from a single point). The FCC knew that
40db per decade is not the correct extrapolation factor (the amount of
reduction in BPL radio wave radiation from electrify power lines needed to
avoid radio interference), and that banning HF (High Frequency, Short Wave) BPL
(the Broadband Power line system) on overhead (pole mounted) power lines is the
best option to protect the viability of HF (High Frequency, Short Wave)
communications. The Commission (FCC) knew this because its own (FCC) technical
staff said so. And now we (the general public) know that they (the FCC) know.
Here is what we don’t know. Now that Powell and Martin (the old FCC leadership)
are gone will the new leadership at the FCC fix this (BPL FCC regulations that
are insufficient to prevent BPL radio frequency interference to radio
communications stations and radio listeners).”
are in brackets.
is an example where research gained from the hobby of radio listening has been
used in a dramatic way by a non government organization (the ARRL) to bring a
government agency (the FCC) to account for its decisions.