L'adresse IP principale: 74.208.236.226,Votre serveur United States,Lenexa
ISP:1&1 Internet Inc. TLD:com Code postal:us
Ce rapport est mis à jour en 20-Jul-2018
Created Date:
1996-11-06
Changed Date:
2015-09-23
Données techniques du hamtv.com
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Notre service GeoIP a trouvé l'hôte hamtv.com.Actuellement, hébergé dans United States et son fournisseur de services est 1&1 Internet Inc. .
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site index on this page: ham tv all about amateur television - atv. ham radio with vision hosted by tom o'hara w6org - email: retired owner of p.c. electronics, the leader in amateur television equipment for 50 years - history . see my w6org surplus web page. i'm happy to answer any atv questions from licensed radio amateurs so please always include your call letters in the email. licensed amateur radio operators can transmit live action color video and sound to other hams easily on the 420 mhz and up amateur bands. check out all the fun applications and technical info on our web site. low cost atv start up start simple, build your atv operation and one day it may look like wa8rmc's ham shack. new - listen to the everything hamradio podcast interview with tom w6org on the subject of atv. your tv set receive directly on cable channels 57 thru 60. 5l-70cm old antenna lab 5 element beam. great for home or portable. $85 or make a ground plane 434 transmitter 50 mw....$99 434 mhz, receive on cable channel 59. great for atv demos, hat cam, robot, r/c video. mini color camera or your camcorder the least cost way to just try out amateur television - atv - with a neighborhood ham, ham club demo, public service events and r/c transmitting live action color video a half mile or more line of sight, is to buy a videolynx 434 50 mw transmitter module for $99 and connect it to your camcorder or any camera with a video output, 9v alkaline battery and 70cm antenna - receive it with the tv set to cable channel 59. if you want sound and able to select any of the 4 standard 70cm atv frequencies, then the videolynx z70a at $149 is for you. for higher power and greater dx add a linear amp - see the transmitting section below. click on the photos for details on some of the neat atv applications: portable atv pouch put the 434 or z70a transmitter in a belt pouch along with the camera and batteries to send video back to a mobile command post, aid station, etc., at public service events. atv hat cam let others see what you see by making a hat cam with the 434 or z70a transmitter module and a mini color camera. see pages 9-11 to 9-13 in the arrl operating manual 10th edition. also see the arrl handbook for radio communications image communications chapter. r/c atv put a 434 transmitter in an r/c car, aircraft, boat or robot to get a remote view and better control. balloon atv see the earth live from 80,000 ft like this view with a vm-70x transmitter module in a high altitude balloon. televise ham club meetings live or from a recording simplex or to a local repeater for those who couldn't make it with the tx70-5s transmitter. the 434 or z70a modules are great for demonstrating atv at a ham club. 70cm atv base station example receiving atv any tv with a cable tv tuner can receive atv directly on the 70cm ham band. transmitting atv tx70-5s 4w+ 70cm transmitter 4 channels with sound. tx atv to a local repeater, eoc, or direct to local hams. 70cm antennas 5l-70cm old antenna lab 5 element, end mounted, 31" boom and 50 ohms. great for home or portable. $85 receiving atv have a local atver transmit a picture to you while you talk back on two meters - usually 144.34 or 146.43 simplex. you will hear them on the sound subcarrier coming out of your tv speaker. connect your tv to an outside 70cm antenna with the same polarity as used by your areas atvers. it does not get any cheaper than this to check out the atv action. the 75/50 ohm miss match is negligible and you can use a f to n connector adaptor. set your digital or old analog tv tuner to cable channel 57, 58, 59 or 60 depending on what frequency is used in your area - cable channels are on different frequencies than the old analog over the air broadcast channels. cable channel 60 is in the 70cm ham band at 439.25 mhz, over the air broadcast uhf tv channel 60 is 747.25 mhz, and each channel is spaced by 6 mhz. the tv tuner should lock on, even if off a mhz - the off the tv screen photo at right is actually transmitted 3/4 mhz higher than cable channel 59. antennas are the key, so good coax and mounted as high as possible to get line of sight will work best. you can build an antenna or buy one like in the antenna section below. it is best to select a tv that does not go to blue screen or automatic shut off when there is a snowy picture or no signal present. you dont want the tv to shut off while monitoring a local atv repeater, searching for dx or aligning your beam. some tv's require reprogramming the active channel memory so that you can use cable channels 57-60 or channel 3 or 8 if using a downconverter for the 900 or 1200 mhz bands. the easiest is to connect the tv to your cable tv service, then push the channel program button in the catv mode. this should set the tv up to select most all channels even when no signal is present when no ham is on the air at that instant. new tv's will contain an analog ntsc cable channel tuner in addition to digital channels per fcc rule 15.118(b) to accomodate all cable tv systems, but it is a good idea to keep your old analog only tv's for atv work rather than trash them when you buy a new digital tv. a net can greatly benefit getting atvers by video to show and tell rather than trying to describe something by voice only - "pictures are worth a thousand words." with atv you can have full duplex audio - while one transmits and talks on the atv sound subcarrier, everyone else can watch and listen on their cable ready tv set (cable ch 58, 59, 60) or tv with our downconverter, and at the same time talk back on a two meter fm voice frequency (better interaction and eliminates the long winded). how about setting atv up at your ham club and transmitting the meeting live or by tape later to those members who cannot attend. the possibilities are endless - see our atv application notes web pages. want to check out atv in your area but don't have a cable ready tv (cable ch 57-60), or see a local repeater output that is on the 900 or 1200 mhz band? then you need to add a downconverter between your antenna and tv that will convert the higher ham bands down to a tv channel. what goes in at the ham band is mixed down to come out on the tv channel. 70cm and higher band analog atv will be around for a long time due to the high cost and complexity of transmitting digital atv and the fact that new tv's must also have analog cable tuners in them per fcc rule 15.118(b). however, a downconverter will work for both analog or digital atv - which ever mode goes in, comes out at the downconverted channel. current manufactured us tv's have tuners that will work with cable channel analog or digital qam, as well as over the air broadcast atsb 8-vsb. we no longer manufacture atv downconverters, but you may be able to find some of our prior model tvc series downdownconverters on ebay and qrz.com on line swapmeet. transmitting atv any technician class licensed radio amateur can transmit live action black and white or color video along with audio in the 70cm and above bands to other hams simplex or through atv repeaters. the 70cm band is the most popular for atv since any standard tv can be used to receive directly on cable channels 57-60, simple analog transmitters are least cost, and the lower the frequency, the farther the dx with all else equal. very few multimode uhf transmitters and transceivers support the broad band atv mode. most all atvers use transmitters specifically made for video. sending analog video is easy by plugging in your camcorder, video camera, digital camera, vcr, or any device with video outputs that can output on an a/v cable and be normally seen in a video mointor, vcr or tv sets a/v inputs. most camera mic's are amplified and output line audio which can be plugged into the atv transmitters line audio input. fm atv occupies 3 times the bandwidth of analog and can be found in the 33cm bands and above in areas where the particular bands are less used by other modes - consult your local band plan. fm h
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REGISTRAR Network Solutions, LLC.
SERVERS
SERVER com.whois-servers.net
ARGS domain =hamtv.com
PORT 43
TYPE domain RegrInfo DOMAIN
NAME hamtv.com
CHANGED 2015-09-23
CREATED 1996-11-06
STATUS clientTransferProhibited https://icann.org/epp#clientTransferProhibited
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