- published: 22 Dec 2014
- views: 6027
The 80 meter or 3.5 MHz band is a band of radio frequencies allocated for amateur radio use, from 3.5 to 4.0 MHz in IARU Region 2, and generally 3.5 to 3.8 or 3.9 MHz in Regions 1 and 3 respectively. The portion of the band used for phone (voice) communications is sometimes referred to as 75 meters.
80 meters is the most popular band for regional communications networks through the late afternoon and night time hours. It is usually reliable for short to medium distance contacts, with average distances ranging from local contacts within 200 miles/300 km out to a distance of 1,000 miles/1,600 km or more, depending on atmospheric and ionospheric conditions.
The 80 meter band is favored for ragchews between amateurs within a range of 500 miles/800 km. During contests the band is filled with activity beginning before sunset and continuing all through the night. The 80-meter band begins at 3.5 MHz and goes up to 4.0 MHz. The upper part of the band, mostly used for voice, is often referred to as 75 meters, since the wavelength there is between 80 and 75 meters.
A 7 MHz dipole made to operate on 3.5 MHz by adding end loading coils. It won't be as efficient as a full sized 80m dipole and the bandwidth will be narrow. However it will get you on the air from a small yard. The antenna here was inspired by and is very similar to VK5AH's 4 band dipole (website http://users.picknowl.com.au/~wavetel/antennas.htm#4bandHF ). The only thing that's different with mine is that it has a dipole for 10 metres (not 15 metres) and I didn't use a balun. Coil dimensions: 115 turns of medium sized insulated hook up wire on 40 mm plastic pipe close wound. Length of coil about 250mm - cut your pipe for 270 and preferably 290 mm to allow room for wire thickness variations.
This is the sort of goal you dream of kicking on the 'G
Cool footage has emerged of a GoPro camera becoming dislodged and falling 80 metres into a lake during a drone flight. In the footage, filmed on Saturday, the quadcopter is flying across a lake capturing beautiful scenery when the GoPro disconnects and plunges into the water. Fortunately, the camera survives and films the spiralling fall and also captures footage underwater.SUBSCRIBE for your daily dose: http://bit.ly/Newsflare Got a video to share? Submit your video here: http://bit.ly/NewsflareSubmit LIKE us on FACEBOOK: http://bit.ly/NewsflareFB FOLLOW us on TWITTER: http://bit.ly/NewsflareTwitter Newsflare has an eager team of people searching the web for top video content to share, we also take submissions from those looking to make sure their videos get seen by many plus earn so...
time to get serious about these "tests" . Using a phantom dji quadcopter for aerial footage .
A demonstration of how 3.579 MHz TV colourburst crystals can be pulled to cover the CW end of 80 metres, all the way down to 3.500 MHz. Use is made of a 'super VXO' circuit with multiple parallel crystals and carefully selected inductors to achieve this amazing range. The ideal could be useful to convert crystal locked QRP rigs to be more frequency agile and thus more versatile. Frequency stability checks: tested on 3.530 MHz. 0 min 3.530.0 5 min 3.528.5 15 min 3.527.5 40 min 3.527.2 60 min 3.527.0 75 min 3.526.9 85 min 3.526.9 This VXO needs to be warmed up for 15 - 30 min until it settles down. Buffering also needs to be much better than with a crystal oscillator otherwise the keying will be chirpy.
This is the latest Xiegu X108G out door version..This time on 80 metres....I have used a cheap ipad tablet stand for my X108G..They are very cheap to buy on ebay amazon or many of the cheap £1 type shops in the UK..I got this one off Ebay for £1.95..It makes a cracking stand and you can have the transceiver at various viewing angles with it...
M70 80 metres hurdles at World Masters Championships Perth 2016. Time 14.13. Results http://results.simplyregister.net/Perth2016/
M75 80 metres hurdles at World Masters Championships Perth 2016. Time 13.67. Results http://results.simplyregister.net/Perth2016/
WAMSI scientists aboard the RV Solander are currently surveying the sea floor to estimate biodiversity, map habitats and help discover what flatback sea turtles eat. Watch a zebra shark cruise the sea floor with trevally more than 80 metres deep, as captured by the AIMS towed video system.
Notícia emesa a l'informatiu del dia 20 d'octubre de 2016.
A pulsing signal recorded on the 3.5Mhz (80m) band on 5th October 2016 at 00:56z.
80 metres hurdles is a distance in hurdling ran by women until 1972 in international competitions.Since the 1972 Summer Olympics, the event has been permanently replaced by the 100 metre hurdles. This channel is dedicated to make Wikipedia, one of the biggest knowledge databases in the world available to people with limited vision. Article available under a Creative Commons license Image source in video
Can't be done
Una serp pitó de prop de 3 metres ha aparegut, avui dematí, dins un contenidor de fems de Can Pastilla. Aquesta és la imatge del rèptil, de grans dimensions. Els operaris d'EMAYA l'han trobat quan anaven a buidar el contenidor, ubicat al carrer de Manuela de los Herreros. L'animal no es movia i en un principi els treballadors d'EMAYA pensaven que era mort. Després de comprovar que era viu, el rèptil ha estat traslladat al Consorci per a la Recuperació de la Fauna de les Illes, el COFIB.
Amazing antenna. Full wave 80m antenna. The boom is 24m (78.7402feet) long and weighs 1900lbs.
Furuno 1550 Marine HF Transceiver on 80 Metres listening to AM American Transmissions on 3.875 mhz using a loop Emergency cave rescue aerial designed for Figaro SSB Comms radio on about 3mhz.
http://the8020drummer.com/lessons/dark-side
Will is getting sick of Sophie's pressuring him into competitive free-diving, but agrees to compete in a competition to set a new depth record. Sophie is delighted with Will's record breaking dive of 80 metres, but after the competition, Will gives up competitive free-diving to shrug off Sophie's influence. As Will sets his record, however, Rikki witnesses Sophie and Zane kissing, and her relationship with Zane is ended for good. ----- This is the official fan channel of the TV-series "H2O-just add water". Enjoy exclusive videos and information about your favorite series and be part of the H2O-community:) ----- Subscribe now: http://www.youtube.com/H2OtheOfficial?sub_confirmation=1 The German H2O channel: http://www.youtube.com/user/H2OdasOriginal H2O-Fans on Facebook: http://www.f...
This ham radio coil-loaded 40 and 80 meter inverted V dipole HF wire antenna is easy to build! Loading coils make this antenna a full size on 40 meters and a shortened 80 meter antenna. A perfect antenna for the ham radio operator with a smaller backyard. For more information: http://www.amateurradio.bz/40_80_meter_antenna.html
Charyn Canyon is an 80 km canyon in Kazakhstan on the Charyn River, 200 km (120 mi) east of Almaty. It stretches 154 kilometres (96 mi) along the Charyn River in the northern Tien Shan mountain range. In parts, it attains a depth of 150 to 300 metres (490--980 ft). One part of it is known as Valley of Castles for its unusual rock formations. The width of it ranges from 20 to 80 metres (66--260 ft) and the length is 2 kilometres (1.2 mi).
View the minute (the formal, legal record of the meeting and any decisions taken) at: http://egenda.dumgal.gov.uk/aksdumgal/users/public/admin/kab12.pl?cmte=PLN&meet;=44&arc;=71 This is an audio recording of the Planning Applications Committee Meeting for Dumfries and Galloway Council from 27 March 2013. List of agenda items and times: 10.34 1. Sederunt and apologies 10.34 2. Declarations of Interest 10.35 3. Minute of Meeting of 27 February 2013 10.40 4. Mochrum Fell, Corsock -- Planning Application for the erection of wind monitoring mast up to 80 metres in height with guy wires, bird diverters and aviation lighting (12/P/2/0354) 11.35 5. Benbrack, near Carsphairn Forest - Planning Application for the erection of a temporary wind monitoring mast (up to a height of 80 metres for a ...
A team of explorers and researchers discovered what they believed to be an ancient pyramid complex in a remote area of the Ecuador Amazonian jungle, one not known to the general public internationally or even within the country. Bruce Fenton, author and researcher, believes the complex may be the ‘Lost City of the Giants’, so named for the large giant-sized tools that were found in the vicinity, as well as the local legends that speak of a race of giant humans who once inhabited the region. At the discovered site there is one extremely large pyramidal type structure of approximately 80 metres square base and 80 metres height, with steeply inclined walls. This structure is made up of hundreds of large stone blocks, weighing approximately 2 tonnes in weight. The large hill has a flat area...
A team of explorers has found a gigantic stone pyramid (and gigantic stone hammers) in the Amazonian rain forest of Ecuador, an ancient complex which corresponds to a local legend about a City of Giants. At the discovered site there is one extremely large structures of approximately 80 metres square base and 80 metres height, with steeply inclined walls. This structure is made up of irregular shaped large cut stone blocks, each currently calculated to be approximately 2 tonnes in weight; many hundreds of such blocks make up the walls of the building. http://www.epicvoyagers.com/ Epic Voyagers Guest Bruce Fenton Guest Host Daniella Fenton