Posts Tagged ‘band’

C Crane Co CC2B Radio-2 AM FM/Weather and 2-Meter Ham Band (Black Mica)

• Exceptional AM reception and FM/Weather/2-Meter Ham Band
• Built in Twin-Coil Ferrite antenna
• Get government issued alerts on the Weather band
• Life saving information in emergencies like Katrinas come through on the 2-Meter Ham band
• Clock alarm sleep timer headphone jack display light

The CC Radio-2 is our newest model of CC Radios. It is designed for long range receptiona and emergencies. The AM reception has been boosted with our built in Twin-Coil FerriteAM Antenna. The FM reception is excellent. The weather band on the CC Radio-2will keep you informed of any government issued alerts. The 2- Meter Ham band can be a life saver in emergencies like Katrina. Other radio features include: 5 memories per band, bass and treble, clock alarm, sleep timer, headphone jack, line-in/line-output jack. Runs on included AC power cord or 4 "D" batteries.

List Price: $ 159.95

Price: $ 149.95

Sticker for hf Ham Radio Transceiver Receiver NEW!

• Guaranteed to get some laughs!
• Unique!
• Will last at least 7 years.
• 2.5" x 4"

Nobody's gonna mess with your ham radio after they see this warning sticker! It's professionally printed using UV- resistant inks on premium-grade vinyl and topped with a weatherproof overlaminate. Easy to apply on any clean, hard surface. This is an exclusive sticker designed by StickFigs. You won't find it anywhere else! At StickFigs, we specialize in creating high quality, unique warning stickers. Unlike other sticker makers, we produce ours in small batches. Ensuring exceptional quality. Will last up to 7 years.

List Price: $ 1.95

Price: $ 1.95

C Crane Co CC2T Radio-2 AM FM/Weather and 2-Meter Ham Band (Titanium)

• Exceptional AM reception and FM/Weather/2-Meter Ham Band
• Built in Twin-Coil Ferrite antenna
• Get government issued alerts on the Weather band
• Life saving information in emergencies like Katrinas come through on the 2-Meter Ham band
• Clock alarm sleep timer headphone jack display light

The CC Radio-2 is our newest model of CC Radios. It is designed for long range receptiona and emergencies. The AM reception has been boosted with our built in Twin-Coil FerriteAM Antenna. The FM reception is excellent. The weather band on the CC Radio-2will keep you informed of any government issued alerts. The 2- Meter Ham band can be a life saver in emergencies like Katrina. Other radio features include: 5 memories per band, bass and treble, clock alarm, sleep timer, headphone jack, line-in/line-output jack. Runs on included AC power cord or 4 "D" batteries.

List Price: $ 159.95

Price: $ 149.90

The 2 meter amateur radio band is a portion of the VHF radio spectrum, comprising frequencies stretching from 144.000 MHz to 148.000 MHz in ITU Regions 2 (North & South America plus Hawaii) and 3 (Asia and Oceania) and from 144.000 to 146.000 MHz in ITU Region 1 (Europe, Africa, and Russia). The license privileges of amateur radio operators include the use of frequencies within this band for telecommunication, usually conducted locally within a range of about 100miles (160km).

Operating on 2 meters

Because it is local and reliable, and because the licensing requirements to transmit on the 2-meter band are easy to meet in many parts of the world, this band is one of the most popular non-HF ham bands. This popularity, the compact size of needed radios and antennas, and this band's ability to provide easy reliable local communications also means that it is also the most used band for local emergency communications efforts, such as providing communications between Red Cross shelters and local authorities. In the U.S., that role in emergency communications is furthered by the fact that seemingly every amateur-radio operator has a 2 meter mobile radio or walkie-talkie.
Much of 2-meter FM operation uses a radio repeater, a radio receiver and transmitter that instantly retransmits a signal over a longer distance. However, even without repeaters available, it provides reliable crosstown communications throughout smaller towns and that makes it ideal for emergency communications. Simple radios for FM repeater operation have become plentiful and inexpensive in recent years. A fully-functional FM transceiver and antenna can be obtained for under US0 new and far less used for a modern one.

DX

While 2 meters is best known as a local band, there are many opportunities for long distance (DX) communications. Occasionally, bending in the atmosphere's troposphere (ducting) can allow 2-meter signals to carry hundreds of miles. This is called a lift.
In rare cases, Sporadic E propagation can bring contacts well over a 1,000miles (1,600km). 2 meters is also utilized in conjunction with 70cm (Mode B or V/U) on some amateur radio satellites, giving distances of up to around 3,000miles (4,800km) with a Low Earth Orbit satellite.

A set of 2 long Yagi antennas for the 2 meter band fed in phase to obtain more gain and narrow main lobe of radiation (WA6PY)
By speeding up Morse code using an audio tape recorder, or using a computer, very short bursts of signal can be bounced off the ionized gas trail of meteor showers allowing DX. This is often called Burst transmission.
Another phenomenon that produces upper atmosphere ionization suitable for 2M DXing are the auroras. Since the ionization persists much longer than meteor trails, regular audio signals can be used, but the constant movement of the ionized gas leads to heavy distortion of the signals causing the audio to sound 'ghostly' and whispered.
To communicate over the longest distances hams use moonbounce. This involves high power and good antennas to reflect the VHF signals off the moon. VHF signals normally escape the earth's atmosphere, so using the moon as a target is quite practical. Due to the delay of the signal traveling to the moon and back, a person transmitting may hear the end of his own transmission returning.
Links to 2m propagation sites
DX-Sherlock's real-time 2m propagation maps
DX-Sherlock's real-time VHF&up propagation ticker.

References

^ US Amateur Radio Frequency Allocations. http://www.arrl.org/FandES/field/regulations/allocate.html accessed 12 May 2008.
^ RSGB UK band plan. http://www.rsgb.org/spectrumforum/bandplans/RSGB Band Plan master.pdf or http://www.rsgb-spectrumforum.org.uk/Papers/RSGB Band Plan master.htm Accessed 14 May 2008.
^ Sharing spectrum with other services a ham radio reality. The ARRL Letter, Vol. 20, No. 2. http://www.arrl.org/arrlletter/01/1102/ Accessed 14 May 2008.
^ http://www.rsgb.org/getlicence/#foundation RSGB licensing guide
^ http://www.rsgb.org/emergency/ RSGB Radio Emergency & Public Service Communications website
Very high frequency (VHF) and ultra high frequency (UHF) amateur radio bands
VHF
UHF

6 m
4 m
2 m
1.25 m
70 cm
33 cm
23 cm
13 cm
50 MHz
70 MHz
144 MHz
219220 MHz
420 MHz
902 MHz
1.24 GHz
2.32.31 GHz
54 MHz
70.5 MHz
148 MHz
222225 MHz
450 MHz
928 MHz
1.3 GHz
2.392.45 GHz

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