Search results “Vhf uhf signals”
Basic VHF and UHF Fundamentals
Basic VHF and UHF Fundamentals Antennas are a very important component of communication systems. By definition, an antenna is a device used to transform an RF signal, traveling on a conductor, into an electromagnetic wave in free space. Antennas demonstrate a property known as reciprocity, which means that an antenna will maintain the same characteristics regardless if it is transmitting or receiving. Most antennas are resonant devices, which operate efficiently over a relatively narrow frequency band. An antenna must be tuned to the same frequency band of the radio system to which it is connected, otherwise the reception and the transmission will be impaired. When a signal is fed into an antenna, the antenna will emit radiation distributed in space in a certain way. A graphical representation of the relative distribution of the radiated power in space is called a radiation pattern.
Views: 183758 Dan Vanevenhoven
Ham radio VHF/UHF Weak Signal - How to get started Part I
In this series of videos, I will be focusing on how to get started in doing ham radio VHF/UHF Weak Signal work. VHF/UHF and microwave weak signal work to me is very exciting yet the most challenging work among all the ham radio activities. To be able to work on these frequencies not only requires a lot of knowledge, experiment and techniques but also requires a certain level of abilities to make your own equipment. This video is just to show beginners on how to get on the most popular frequencies 144mhz and 432mhz. With readily available equipment. Hope you enjoy this video. And I'll see you on the air! Some reference links in this video: ARRL US band plan https://goo.gl/kppHb8 DK7ZB Website: https://goo.gl/H5ZaQ6
Views: 777 Fishing Ham
Combine UHF and VHF TV Antennas  Problem Solved
In this video I will show you what to use to Combine UHF and VHF TV Antennas together the right way. The product name is VHF / UHF Antenna Combiner from Antennas Direct. Merge the signals from a UHF antenna with the signal from a VHF antenna through one coaxial cable Perfect for applications requiring single band antennas All-weather housing protects connections from corrosion Includes UHF/VHF combiner diplexer, all-weather housing and mounting hardware
Views: 12213 Danny S Hodges
UHF VHF TV Antenna Combiner
Combine two antennas for even better reception.This all weather antenna combiner merges the signals from a UHF antenna with a VHF antenna on the same down lead cable.The DC power pass on the UHF port allows for UHF-only amplification in special circumstances.UHF signals require amplification, but the VHF signals may not. Or a customer has an existing amplified antenna, but also needs to add a separate VHF antenna that doesn't need amplification. UHF VHF TV Antenna Combiner. Combining two TV antennas for better HDTV reception.
Views: 17983 Danny S Hodges
VHF UHF antenna basics - DIY antennas from surplus 800mhz antennas for 2m 70cm and dual band
Video on repurposing surplus 800mhz 5/8 wave antennas to VHF and UHF. These antennas have little resale value and as such are ready candidates for experimentation at extremely low cost. Build it yourself , save money, and learn as you go.
Views: 45449 SurvivalComms
VHF vs UHF - What's the difference
VHF vs UHF - What's the difference We often get calls pertaining to Two-Way radios and our asked what is the difference between UHF ( Ultra High Frequency ) and VHF ( Very High Frequency ), well in today's video we hope we can help clarify and explain the difference between these two radio frequencies. More or less just a small increase of electromagnetic waves but also the length and duration of the signal. I've taken the liberty of providing a variety of other links below that might help you to further understanding this topic. As well I've attached a link that takes you directly to our website where we offer phenomenal pricing on just about every two-way radio battery to date. As well our house brand UHF DSR-590 Two- Way radio. Please Like, Subscribe and Comment with any questions you may have! FaceBook: https://www.facebook.com/bigtimebattery/ Two-Way Radio FaceBook: https://www.facebook.com/dsrtwowayradio/ Twitter: https://twitter.com/bigtimebattery YouTube: https://www.youtube.com/channel/UCHOfamYiFN4vINQf2zpenZA Website: http://bigtimebattery.com/store/ICOM_ICF4001_UHF_handheld_radio.html ----------------------------------------------------------------------------------------------------------- Helpful Links http://www.audio-technica.com/cms/site/af9d127e26abf498/ https://www.youtube.com/watch?v=ABGnx3EyHmQ https://www.youtube.com/watch?v=g331FDP8_cA
In this video i test VHF TV ANTENNA TESTING. This little VHF TV antenna to test and see how good it works. Watch this video and find out how. The antenna best suited for your location that truly receives both VHF and UHF signals is the HD antenna. notice the longer elements (rods) protruding from the HD antenna boom? There are cut to length to receive the VHF frequency wave pattern. The four shorter flat plates in front of the long rods is all that's needed for good UHF signal reception. That's why any antenna smaller than the size of the HD antenna will quickly begin to loose the ability to receive the VHF TV signals. This is also true of set top antennas. The reason rabbit ear antennas have the longer rods that stick up like rabbit ears is to receive the VHF TV signals.
Views: 17491 Danny S Hodges
How does Wind Effect UHF and VHF Digital and Analog TV Signal Propagation DTV ATSC
How does Wind Effect UHF and VHF Digital and Analog TV Signal Propagation.
Views: 14284 norcal715
UHF vs VHF Signals - Improving TV Reception - New TVs & Reception 1950s
Fog Over Portland - UHF and VHF TV signals explained. 1950s TV signals improvement.
Views: 124 Calvin Richardson
How to set the Squelch settings in HDSDR when listening to VHF and UHF signals
How to set the Squelch settings and what is squelch and why you need to use it when scanning in HDSDR software
Views: 3823 Officialvhfuhfchannel
How to make Cell Phone Signal Detector Circuit VHF UHF up to 6 Ghz
This is a simple demonstration how to make cellphone signal detector circuit using RF transistors BFG-591 that could detect 4G LTE mobile phone signal within frequency bands (VHF UHF) up to 6 Ghz. Below are the list of components required to make the circuit. 100 Ohm, 10 KOhm, 47 KOhm - Resistors 10 KOhm - Variable Resistor BFG591 (UHF 6 Ghz Frequency RF Transistor) Blue LED 10 pF - Ceramic Capacitor 10 Cm - Antenna CR2032 (3 Volt) Battery There are few things that you need to understand about the circuit. 1. First - use high frequency RF transistors and in this tutorial we are using BFG591 UHF transistors that could cover up to 6 Ghz 2. Second the potentiometer or variable resistor is used to adjust the intensity or sensitivity of the circuit 3. Finally circuit capture very short range - and if you want to have long range perhaps Germanium Diodes or RF schottky diode can be used at the antenna level to capture the smallest of signal from the surrounding environment before it is amplified by the transistor. Or using power amplifier circuit also can help it capture longer range signal. Hope this video tutorial guide is helpful. You can find the circuit schematic diagram http://howtodosteps.blogspot.my/2017/08/simple-rf-mobile-signal-detector.html #homeMade #DIY #HowTo #Make #CellPhone #Mobile #Detector #iPhone #SamsungGalaxy See also How to make Cheap weboost Cell phone signal booster repeater 2600 Mhz 4G LTE DIY https://www.youtube.com/watch?v=yJg65qYpDnw How to make Mobile Phone Signal Booster - DIY HomeMade https://www.youtube.com/watch?v=V5hS6zGVRJ0 Simplest RF 4G Signal Booster / amplifier Experiment 20 Mhz Crystal Oscillator https://www.youtube.com/watch?v=Q_jCR3nj-hQ
1byone indoor HD Antenna Unbox - Install - Review Cord Cutter
1byone TV Antenna, 50 Mile Range Amplified HDTV Antenna with Detachable Amplifier Signal Booster, USB Power Supply and 10 Feet Highest Performance Coaxial Cable-Black Model: OUS00-0186 https://amzn.to/2GLAbC7 The website claims: Free for Life - Never pay expensive cable or satellite fees again! 1byone TV Antenna can pull in all of your local news, weather, sitcoms, kids and sports programs absolutely FREE. High Performing Slim Design - Slim, soft and lightweight so you can hide it behind the TV, lay it flat on the table or stick it high on a window (with durability against moisture and direct sunshine). It'll pull in hundreds of crystal clear digital & HD shows! Included Detachable Amplifier - Use the amplifier for the tv antenna’s full 50 mile range, or remove it for better reception if you live nearer to the TV broadcast tower. Excellent reception on all FM/VHF/UHF channels. Mount Type-Indoor-table, wall, window 10FT Long Cable and USB Power - The long cable makes it easy to place the tv antenna in the best reception spot in your home. TV Antenna can be powered either by an outlet or a TV’s USB port. What You Receive: TV Antenna with integrated 10ft Coaxial Cable Detachable Amplifier 5ft USB Power Cable Wall Adapter 5V 100mA 3M Adhesive Mounting Stickers instruction manual warranty card 30-day full refund and 12-month warranty with friendly customer service. The Super Thin Antenna is specially designed for receiving digital over-the-air (OTA) TV broadcasts from all your local television stations. So never pay hugely expensive cable or satellite fees again and get all your local channels in crystal clear quality, absolutely free. Indoor HDTV Antenna Features: 1) Reception on all FM/VHF/UHF channels. 2) Can be safely painted to match any home décor without affecting reception or resulting in signal loss. 3) The super soft, unobtrusively thin design and powerful reception capabilities make this antenna a top choice for any home. 4) Fast and easy set up in 3 steps: a. Connect the antenna to “CABLE/ANT IN” on the back of any HDTV. b. Place the antenna in an optimal position, usually on a wall or window. c. Scan for channels using your TV's 'Channel Search' and be ready to enjoy free TV! Indoor TV Antenna Specifications: Frequency range: 47-230MHz, 470-862MHz Receiving range: FM/VHF/UHF Gain: 28dB Output Level:100dBμV Impedance: 75Ω Noise figure: ≤3dB Power Supply: Via USB Power Adapter(5V/100mA) The outdoor antenna I try next is: RCA Compact Outdoor Yagi HDTV Antenna with 70 Mile Range https://amzn.to/2JzmlR2 https://www.youtube.com/watch?v=8Ujo4zUSxIE Pair this with an inexpensive DVR Mediasonic Homeworx HW180STB DVR - PVR unbox, review, setup https://youtu.be/1AuJYw1nBRU Watch our Daily VLOGS from the beginning: https://www.youtube.com/playlist?list=PLWfpgB-7ZiQNvJDxROe1sYBEE4izfXdsP All travel episodes of Life Doesn't Suck from the beginning: https://www.youtube.com/playlist?list=PLWfpgB-7ZiQPBTi3zgevQeTMHunKFBtOT Our FaceBook: https://www.facebook.com/deannaandvince Deanna's Instagram: https://www.instagram.com/deanna_rocca/ Vince's Instagram: https://www.instagram.com/vincerocca/ Vince's Twitter: https://mobile.twitter.com/vincentrocca Camera Gear: iPhone6 http://amzn.to/2q32u1L RetiCAM Smartphone Tripod Mount http://amzn.to/2qA8Idg LifeProof FRE http://amzn.to/2qy5MNT OtterBox DEFENDER iPhone 6/6s Case http://amzn.to/2rlj9lE Rode SmartLav http://amzn.to/2qA1UfI Rode VideoMicMe http://amzn.to/2pZyp3L YiKaiEn iReader http://amzn.to/2rkRW2w Lightning Dock Extender http://amzn.to/2rkSjtP Hero 5 http://amzn.to/2rybQUS Wasabi Power Battery & Dual Charger for GoPro HERO5 http://amzn.to/2rxVrQt Hero 5 Waterproof Case http://amzn.to/2ry6Cc0 GoPro Breathable Mouth Mount http://amzn.to/2ryaQQD GoPro Suction Cup http://amzn.to/2pZzQzi GoPro Jaws Flex Clamp http://amzn.to/2pZQzCD Canon HF S200 http://amzn.to/2pZQgaI Wrist Straps http://amzn.to/2rl4Iy1 Vantec Smoovie Pocket Video Stabilizer http://amzn.to/2qDxuqT Joby MPod Mini Stand for Smartphones http://amzn.to/2rldsnN Manfrotto Tripod http://amzn.to/2ryk5zw Telesin Dome for GoPro Hero 5 http://amzn.to/2rT0muU Litra Lights http://amzn.to/2tLNCYy SafeGo http://amzn.to/2tM1jGY BROLL and Audio from VideoBlocks Save $50 with this link http://videoblocks.refr.cc/57GFJ47 B00IF70T4M B0024R4B5C
Views: 192404 VinceRocca
Source signal hf vhf uhf fr adf4351 control remote
Source signal generator generateur m'était un j'aime a+ merci
Views: 896 So Dgs
VHF and UHF antenna polarization and on air testing
Here is a video part 2 of the Cushcraft 13b2 VHF yagi, explaining and demonstrating the differences in vertical and horizontal polarization of VHF/UHF antennas, and the effects of the way you mount the antenna on the mast or tower. Support my channel at www.patreon.com/hamradioconcepts Antenna can be purchased at www.cushcraftamateur.com
Views: 12707 HamRadioConcepts
Seattelite vhf/uhf antennas and rotators
Conrad and Yeasu G500 rotator, also 6 element home made yagi for 2m and 10 element for 70, built for sattellite use.
Views: 534 Zoltan Szikszai
Make VHF UHF TV Antenna Aerial Booster Preamplifier
MMIC (Monolithic Microwave Integrated Circuits), this component is actually designed for microwave but do not be mistaken, because in fact: MMIC can be used from the frequency range DC to 3 or 4 GHz frequency. so MMIC suitable to amplify RF signals to track HF, VHF, UHF, SHF, microwave. you can make simple and cheap VHF UHF TV antenna (aerial) booster (amplifier) with MMIC. fairly well known MAR-X series made by Mini-Circuits, unfortunately I see on Ebay are quite expensive for me. so I look for other alternatives that are more affordable, I ordering MMIC RFMD Sirenza SGA-3486Z DC-5000MHz SiGe on Ebay. the price is quite cheap only $ 1 per component.
Views: 80964 Xpandro
A $1 range tester for VHF/UHF handheld transceivers
Grab just 4 components and build a range tester for a VHF/UHF handheld transceiver. You'll be able to walk or drive around and have instant feedback on if your mobile signal is being received at home or in a car. Don't be afraid to experiment with values for the resistor and capacitor if it doesn't trigger with your transceiver or you want to alter the timing. Eg the 1k resistor can be as high as 10k and the 10 uF can be as high as 100 uF.
Views: 3937 vk3ye
VHF UHF Weak signal - QSO with N2YTF/p mountain top on 2 meter
Short QSO with N2YTF mountain top Portable on 2 meter. And It turns out he's using one of DH8BQA's voice keyer module in his microphone. I was running about 150W and 5 element homebrew DK7ZB antenna.
Views: 182 Fishing Ham
TV Antenna Outdoor VHF/UHF Signal - TV Antenna Outdoor 2019
Detail & Price ? http://www.amazon.com/dp/B01KUXVKK0/?tag=1topview-20 **************************************** * Free for Life - Never pay your cable or satellite fee for television again! You can get all local channels crystal clear and absolutely free! The 1byone antenna can pull in all of your local news, sitcoms, kids and sports programs. Simply connect the antenna to your TV using a coaxial cable, perform a channel scan, and in minutes youmhbnblmdt1Kll be enjoying your free local programs * The Best Picture and Sound Quality - You can now experience HDTV in the highest quality picture and sound available. Over-the-air broadcasts are transmitted in uncompressed full HD (1080P), ultra HD (4K) and 3D channels; far surpassing what cable and satellite offer. Many local broadcasts are digitally aired in Dolby 5.1 Surround Sound giving you the ultimate sound stage for watching live television. Bullet feature 3 (optional) : Included Mounting Pole and Built-in High Gain and Low Noise Amplifier -J-shape pole for antenna installation; super long distance reception up to 85-100 miles. Superior construction to withstand tough outdoor weather conditions * Included Mounting Pole and Built-in High Gain and Low Noise Amplifier -J-shape pole for antenna installation; super long distance reception up to 85-100 miles. Superior construction to withstand tough outdoor weather conditions * Receive Free Local HDTV, VHF and UHF Signals - Optimized for 1080P digital reception, the 1byone antenna allows you to pick up free local VHF and UHF high-definition and standard definition signals * 1byone Comprehensive Warranty - We stand behind our antenna 100% with a 12-month warranty. Please Note: Freeview reception is dependent upon environmental factors, we cannot guarantee reception in all conditions. We do offer a 30 day money back guarantee on all new items in order for you to test the suitability in your area **************************************** * Thank you for watching this video. * Please subscribe my chanel: https://www.youtube.com/channel/UCh__DwLPTy5LASUPyZxh3Lw?sub_confirmation=1 * Contact: [email protected] #1topview #Daniel88Review #reviewamazon #amazonreview #bestamazon #1byone85MilesDigitalAmplifiedOutdoorAntennawithVHF #1byone #85 #Miles #Digital #Amplified #Outdoor #Antenna #with #VHF #BestOutdoorAntennas #BestOutdoorAntennas2018 #BestHdtvAntenna #BestHdtvAntenna2018
Views: 13 Daniel88 Review
WA 2608 36dB 360° Super Booster VHF UHF HDTV Outdoor TV Signal Antenna
WA 2608 36dB 360° Super Booster VHF UHF HDTV Outdoor TV Signal Antenna, WA 2608 36dB 360° Super Booster VHF UHF HDTV Outdoor TV Signal Antenna
Views: 28 Rodney Beska
Nissan Leaf Electrical Noise on VHF and UHF signal
Quick demo of how much electrical noise the nissan leaf generates on local VHF and UHF frequencies.
Views: 778 knoxieman
10 Best VHF Marine Antennas 2018
UPDATED RANKING ►► https://wiki.ezvid.com/best-vhf-marine-antennas Disclaimer: These choices may be out of date. You need to go to wiki.ezvid.com to see the most recent updates to the list. Our complete review, including our selection for the year's best vhf marine antenna, is exclusively available on Ezvid Wiki. Vhf marine antennas included in this wiki include the shakespeare 5215 classic ais squatty body, sirio sb 1s, pacific aerials p6182, metz manta-6, tram 16771, shakespeare centennial, shakespeare galaxy 5225xt, tram 1610-hc, air wave marine, and tram 1620-hc. Most Recent Picks: https://wiki.ezvid.com/best-vhf-marine-antennas
Views: 874 Ezvid Wiki
VHF:UHF Antenna Farm
N5XO & KE5MHJ Weak Signal VHF/UHF Antenna farm Towers #2, 3 and 4.
Views: 69 ADT Employee
Cell jammer:GPS + Wifi + VHF + UHF + Cell Phone High Power Signal Jammer
[product_url:] http://www.mobilephonejammer.com.au/gps-wifi-vhf-uhf-cell-phone-high-power-signal-jammer-p-59.html GPS + Wifi + VHF + UHF + Cell Phone High Power Signal Jammer Main Features: Devices Blocked: GPS, Wifi, VHF, UHF, Cell Phone Signal Blocked: GPS, Wifi, VHF, UHF, GSM Effective Coverage: 50 Metres Images: Technic Specifications: Isolating Signal Bandwidth: -GSM 925MHz-960 MHz 35dBm 5dBm/30KHz (min) -3G 2110-2170MHz 33dBm 2dBm/30KHz (min) -WIFI 2.4G 2400-2500MHz 33dBm 2dBm/30KHz (min) -GPS 1570-1580MHz 33dBm 2dBm/30KHz (min) -VHF 135MHz-174MHz 34dBm 5dBm/30KHz (min) -UHF 400MHz-470MHz 34dBm 5dBm/30KHz (min) Blocking Coverage: 50 Meters depending on signal strength and working environment High power 6 Antenna Jammer 15 Watt output power blocks even the strongest signals Power supply: AC adapter (AC220V-DC12V) Weight: 2.5KG Package Included: 1pc GPS + Wifi + VHF + UHF + Cell Phone High Power Signal Jammer 1pc Power Adapter (100-240V) 1pc Car Charger 1pc Manual
Views: 3345 TheMobilephonejammer
VHF/UHF Dual Band Antennas unboxing
Vehicle/car Mobile Radio 9cm Antenna Magnetic Base Mount 5M Cable VHF/UHF Dual Band and BNC to SMA connector Adapter - http://s.click.aliexpress.com/e/gHW0ltQ Handheld Ham Radio Scanner Antenna BNC Male 136-174MHZ 400-470MHZ Dual Band Magnetic Base Antenna for Uniden BC75XLT - http://s.click.aliexpress.com/e/d316jdO HYS TC-RHF40 SAM-Male walkie talkie Antenna Flexible dual band VHF/UHF 145MHz&435MHz Antenna for ZASTONE ZT-2R TonFa UV-985 - http://s.click.aliexpress.com/e/FdDWxpI Zastone Mini9+ DMR Mini Digital Walkie Talkie Portable 2W UHF 400-470MHz HF Transceiver CB Radio Comunicador CB Radio - http://s.click.aliexpress.com/e/MAFpxUG
Views: 63 Roberts Kristins
Hewlett Packard 608D VHF Signal Generator Overview and Operation
An overview and "tour" of the HP 608D VHF signal generator including example of it's operation along with a discussion of its construction.
Views: 1412 W4JBM
Adding VHF capability to a UHF outdoor antenna
Many of us invested in outdoor antennas prior to the DTV transition. Prior to the transition, the consensus was that all DTV was to be transmited on UHF only, so UHF antennas became popular. Shortly prior to transition, it was announced that high VHF (7-13) will continue to operate, UHF antennas may have problems recieving those High vhf channels because the smaller UHF dipoles is not tuned to VHF. The new crop of outdoor antennas has both UHF and VHF driven elements. If you have a UHF only antenna or a DB4 coat hanger antenna you may find this mod useful. All it takes is the VHF portion of a cheap rabbit ears antenna, i bougth mine at the dollar store, some scrap wire and some zip ties.
Views: 122804 Guacatechs
UHF & VHF Signal in Brazil
Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 MHz and 3 GHz, also known as the decimetre band as the wavelengths range from one meter to one decimeter. Radio waves with frequencies above the UHF band fall into the SHF (super-high frequency) or microwave frequency range. Lower frequency signals fall into the VHF (very high frequency) or lower bands. UHF radio waves propagate mainly by line of sight; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for television broadcasting, cell phones, satellite communication including GPS, personal radio services including Wi-Fi and Bluetooth, walkie-talkies, cordless phones, and numerous other applications. The IEEE defines the UHF radar band as frequencies between 300 MHz and 1 GHz. Two other IEEE radar bands overlap the ITU UHF band: the L band between 1 and 2 GHz and the S band between 2 and 4 GHz. Radio waves in the UHF band travel almost entirely by line-of-sight propagation (LOS) and ground reflection; there is very little reflection from the ionosphere (skywave propagation), or ground wave. They are blocked by hills and cannot travel far beyond the horizon, but can penetrate foliage and buildings for indoor reception. Since the wavelengths of UHF waves are comparable to the size of buildings, trees, vehicles and other common objects, reflection and diffraction from these objects can cause multipath propagation, especially in built-up urban areas. Atmospheric moisture reduces, or attenuates, the strength of UHF signals over long distances, and the attenuation increases with frequency. UHF TV signals are generally more degraded by moisture than lower bands, such as VHF TV signals. Occasionally when conditions are right, UHF radio waves can travel long distances by tropospheric ducting as the atmosphere warms and cools throughout the day. The length of an antenna is related to the length of the radio waves used. The UHF antenna is stubby and short; at UHF frequencies a quarter-wave monopole, the most common omnidirectional antenna is between 2.5 and 25 cm long for example. The short wavelengths make the VHF and UHF bands the first bands at which practical transmitting antennas are small enough to mount on handheld devices, thus these frequencies are used for portable wireless devices. UHF is widely used in cordless telephones, cell phones, walkie-talkies and other two-way radio systems from short range up to the visual horizon, about 40 miles (64 km). Their transmissions do not travel far, allowing frequency reuse. Public safety, business communications and personal radio services such as GMRS, PMR446, and UHF CB are often found on UHF frequencies as well as IEEE 802.11 wireless LANs ("Wi-Fi"). The widely adapted GSM and UMTS cellular networks use UHF cellular frequencies. Radio repeaters are used to retransmit UHF signals when a distance greater than the line of sight is required. Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 MHz to 300 MHz, with corresponding wavelengths of ten to one meters. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF). Common uses for VHF are FM radio broadcasting, television broadcasting, two way land mobile radio systems (emergency, business, private use and military), long range data communication up to several tens of kilometres with radio modems, amateur radio, and marine communications. Air traffic control communications and air navigation systems (e.g. VOR & ILS) work at distances of 100 kilometres or more to aircraft at cruising altitude. VHF was used for analog television stations in the US, and continues to be used for digital television as well as in Europe but in the latter only Band III is used even though originally Band I was planned to be used. Some older DVB-T receivers included channels E2 to E4 but newer ones only go down to channel E5. VHF propagation characteristics are suited for short-distance terrestrial communication, with a range generally somewhat farther than line-of-sight from the transmitter (see formula below). VHF waves are restricted to the local radio horizon less than 100 miles. VHF is less affected by atmospheric noise and interference from electrical equipment than lower frequencies. While it is blocked by land features such as hills and mountains, it is less affected by buildings and can be received indoors, although multipath television reception due to reflection from buildings can be a problem in urban areas. Unlike high frequencies (HF), the ionosphere does not usually reflect VHF waves (called skywave propagation). VHF waves can be aided by tropospheric ducting.
Views: 114 Frederico Custodio
ft817 VHF UHF weak signal RX
ft817 VHF UHF weak signal RX ant are 5 ele on 144 10 ele on 432. Receiving packrat W3CCX/B no preamp.
Views: 421 Tianyi Xie
Jammer 12 Antennas Newest Adjustable WiFi GPS VHF UHF LoJack 3G 4G All Bands Signal Blocker
Nuevo y Ajustable Bloqueador de 12 Antenas WiFi GPS VHF UHF LoJack 3G 4G Bloquea todas las Bandas y Señales
Views: 611 Casa del Espia
DIY antennas The VHF / UHF folding ground plane antenna v2.0
Short video on a lightweight and packable VHF/ UHF antenna that has broad bandwidth , good performance, simple in implementation, and low cost.
Views: 5227 SurvivalComms
Cheap DIY UHF/VHF Transmitter
I does work, but not well. In fact, it can only transmit good signal in a 30 cm radius, so it's not really efficient. However you can boost the signal by using a uhf/vhf amplifier. If you are wondering, the antenna I made also works for receiving TV signals. The antenna is made of cardboard and aluminium foil
Lets compare VHF/UHF BACKPACKABLE QRP RADIOS and antennas
Quick trip out to compare using the Yaesu VX8 triband with a Diamond SRH940 whip antenna compared to the FT-817 with a RA1500BM direct into the radio and the MP1 Superantenna using the duplexer. Many thanks to M6CEQ, M0ADM, G3ZPF and G4VRX for your input.
Views: 3632 2E0EZT amateur radio
RV3DHB: Finished Installation VHF/UHF antennas (Part 4/4)
RV3DHB: Finished Installation VHF/UHF antennas (Part 4/4) + Troitsk view
Views: 276 Tony RC3C
RV3DHB: Preparations for installing VHF/UHF antennas (Part 1/4)
RV3DHB: Preparations for installing VHF/UHF antennas + Troitsk view (Part 1/4)
Views: 294 Tony RC3C
Antennas for the VHF and UHF range on portable receivers
Types of antennas you can use on your portable radio
Views: 49770 Officialvhfuhfchannel
Possibility of tuning the VHF and UHF ranges from Websdr receivers online
Although most are limited to ham radio ranges, you can still use some web sdr receivers to tune in to VHF and UHF signals online www.websdr.org
WA-2608 36dB 360° Super Booster VHF/UHF/HDTV Outdoor TV Signal Antenna
The WA-2608 Outdoor TV antenna is your alternative to cable or satellite pay service, it allows you to receive Free DTV/HDTV signal over the air in most areas. In most case it can receive over 40 channels. Switch to Free over the air TV and save. If you are looking for an alternative to paid TV and want to save money, Free over the air TV signal is the answer. Available:http://www.discountplusinc.com/wa-2608-360-vhf-uhf-digital-dtv-hdtv-long-range-rotating-amplified-outdoor-tv-antenna-with-controller-box-and-remote/
Views: 51578 Discount Plus, Inc
RCA TVPRAMP1R Amplifier Antennas Review And Testing
In this video I take a RCA TVPRAMP1R Amplifier for a 60 mile test and review.The RCA TVPRAMP1R TV antenna is as good of booster as any you can buy. The RCA TVPRAMP1R preamp is one of the few preamps available with separate or combined VHF UHF inputs. The power supply is 9V and the preamp draws 68ma. 1 Full band gain measurement. The UHF gain is 2-3 dB higher than claimed. 2 UHF gain to 1000 MHz. I wanted to see how badly a nearby cell phone tower might affect the preamp. The gain is 20 dB up to 1000 MHz. 3 An expanded look at VHF and the FM trap. With the FM trap switched out the gain is flat from low to high VHF. 4 Isolation. This is referenced to 0 dB and shows how much signal leaks through the preamp with the power off. Strong signals, especially on VHF will still be received even with no power applied. 5 Noise Figure UHF. This is better than most preamps. 6 Noise Figure high VHF. Good enough for most situations. 7 Noise Figure low VHF. Better than required since the environmental noise will be higher than the noise figure. 8 Return Loss for low, high and UHF combination input. The markers show the lowest return loss highest SWR for each band. I converted those to SWR. 9 Return Loss for the separate VHF input. The markers show the lowest return loss highest SWR for the low and high VHF bands. I converted those to SWR. 10 Return Loss for the output port. The markers show the lowest return loss highest SWR for each band. I converted those to SWR. This is much better than I've seen on other preamps.
Views: 39551 Southern Ideas
Assembly Instructions for the HDB91X Yagi TV Antenna from Xtreme Signal
An instructional video on how to put together, one of the strongest long range yagi antennas on the market. This antenna enables you to start receiving FREE local HD broadcasts from ATSC signals. Go to http://www.solidsignal.com for more information!
Views: 185745 Solid Signal
Minicircuits UHF / VHF amplifier weak signal test / Weather Satellite Image Reception - Part II
Ok .. change of strategy .. Running into issues with using a mixer in this case and VCO stability in this particular application .. So I remembered that I have a SDR RTL USB dongle that I can use for a receiver .. and all I would need, due to its lack of sensitivity, is a preamp and a filter, Thanks to Minicircuits I have both .. You'll see both in the video The tested amplifier is a Minicircuits ZX60-P103LN+ Please remember all I intended to test was the weak signal sensitivity of this particular device. Wasnt concerned with, nor can I measure ( yet ) things like SWR and return loss.
Views: 2931 N2CUA
Ed Fong DBJ-1 Dual Band UHF/VHF Antenna Assembly And Installation
Get one and read more about the antennas here: https://edsantennas.weebly.com/ Shop our Amazon Affiliate Shop: https://www.amazon.com/shop/iridium242 Support this channel while getting your long term food storage here! https://www.thrivelife.com/iridium242
Views: 10682 Iridium242
TV Antenna Band Separator (VHF UHF Mixer)
I was cleaning my room and discovered this old school band separator and decided to explain about its purpose. Band separator was popular during the analog days because using a VHF antenna to receive UHF signals may cause ghosting. Band separator solves this problem by using two different dedicated antennas for VHF & UHF. In Europe after analog shut down, all DTV are in UHF which makes band separator obsolete. Even in US where both VHF & UHF bands are still use in DTV, many antennas can receive both VHF and UHF with good result which makes band separator less important unless if you are in a location where VHF transmitters are in different location than UHF and each receiving antennas must face in different direction then band separation still helps even on DTV. See Diplexer from Wikipedia http://en.wikipedia.org/wiki/Diplexer
Views: 14446 bobexr3
Glass Mount Mobile Antenna Install ~ VHF UHF Repeaters
Tram Browning 1191 Amateur Dual Band Glass Mount Antenna https://amzn.to/2RJzDBu Loctite Silicone https://amzn.to/2BRvwta I install the Tram Browning 1191 Amateur Dual Band Glass Mount Antenna UHF 440-450 MHz and VHF 144-148 MHz PL-259 for Icom HYT Vertex Mobiles two way radio antenna VHF 144-148 MHz 2.5 dBd gain UHF 440-450 MHz 4.5 dBd gain Max power 50 Watts VSWR less than 1.5:1 28 1/2" Height Easy installation. I chose this for my vehicle has glass. I used it in the "out of the box" condition and experienced poor performance. To properly use this antenna you will have to sweep it to check SWR. I used a MFJ-226 and was able to see the SWR change in real time as I adjusted the small screw. I was able to get the antenna down to 1.24, but when I added the clip for a ground plane it dropped all the way down to 1.19. Again simple to trim if you have the proper tools. The SWR at 144.100mhz was 1.45 and at 148.000mhz it was 1.50. It fell to 1.19 at 146.675mhz. I had a hard time trying to figure out the way to use the ground plane. I found it to be effective if you tighten the fitting on the hook to keep it in place. Look at the pictures. When you use the ground clip, be sure it is perpendicular to your whip.
Views: 11523 AnythingWithWheels
ClearStream™ JUICE™ UHF/VHF Amplifier System - Assembly and Installation
Enhance the performance of your antenna installation. Adding an amplifier to an antenna increases the available signal strength. The extra JUICE™ will help overcome challenges including coaxial cables over 100 ft., splitters, or weak signals in the area. Whether you live in an urban, suburban, or rural area, JUICE™ offers ample gain and best-in-class overload protection for dependable reception. Visit our website or chat with us online: http://antennasdirect.com E-mail: [email protected] Call the Connection Crew Toll-Free in the U.S.A.: 1-877-825-5572
Views: 2793 Antennas Direct
Zello VHF UHF - Test interface
Zello Crosslink to VHF- UHF Test interface Convert the analog signal to digital. Listen your radio voice in your cell phone.
Views: 4538 Nikolas sv2fpm
VHF Kit: VHF Antenna Reception - Assembly and Installation
Easily add VHF capability (channels 7 to 13) to your current Antennas Direct antenna. The VHF Kit allows you to receive VHF signals 25 to 50+ miles from the broadcast towers. The kit will attach to most ClearStream™ and Bowtie antenna reflector screens, or the kit can be mast-mounted. For both indoor and outdoor use. The kit includes VHF/UHF weatherproof combiner housing, a 3-foot RG6 jumper cable with weather boot, and 4 zip ties. Visit our website or chat with us online: http://antennasdirect.com E-mail: [email protected] Call the Connection Crew Toll-Free in the U.S.A.: 1-877-825-5572
Views: 6028 Antennas Direct
Assembling the Televes DATBOSS LR MIX UHF/VHF Antenna
This is the biggest, baddest antenna Televes makes for the US market and you'd be smart to get a friend to help you put it together. Our extra-strength assembly video shows you all the steps you'll need to take. Watch, then visit http://www.solidsignal.com/pview.asp?p=149883 to get this super-powered antenna!
Views: 2048 Solid Signal
Two-Way Radio Range and Walkie Talkie Range - 888-298-9489
Other free resources: https://www.intercomsonline.com/2-Way-Radio-Range-How-Far-Can-Two-Way-Radios-Communicate-s/136.htm https://www.intercomsonline.com/two-way-radio-book-a/180.htm Informs on the factors that affect 2-way radio range and walkie talkie range. Helps you choose the right radio technology for you. The transmitting distance of a two way radio set is an important factor to consider when investing in one. The good news is that they can communicate over a multitude of different ranges depending on the type that is bought, so, with a little research, anyone will almost certainly find one that fits his or her needs. The first thing to understand about two way radio range is that most of the commercially available ones operate on frequencies that travel exclusively in straight lines. This means that one will get different results depending on the area in which it is used. Large, metallic objects will block the radio's signal, although other things like walls will not affect it. The frequency may also bounce off of things like trees or buildings, so maximum range is greatly influenced by its environment. Now, assuming that the radios are operating in a wide, open space, the true maximum two-way radio range is calculated by factoring in the curvature of the earth. Because the radio's signal travels in a straight line and the earth is curved, eventually the radio's signal will travel off into the horizon, through the atmosphere, and right into space. The point at which this happens depends upon the height of the antenna. Raising the height of the antenna would extend the line of sight and thus the maximum range of the radios. If one could position his antenna on top of a mountain, he would greatly increase his transmitting distance. Of course, few people are capable of doing that. Power output is another thing that can affect two way radio range. If a radio is not powerful enough, it will cut down on the maximum range determined from the information in the last paragraph. The more power (in watts) a radio has, the farther its transmitting distance. However if the radio is battery powered, those extra watts will run down the charge quickly, so be careful! The last major factor in two way radio range is frequency. The two most popular frequencies for this application are VHF and UHF with neither being inherently better or worse. VHF has a very low frequency and can thus transmit radio waves over longer distances, however, UHF may be better in more crowded areas because it can pass through metal buildings more easily. With all of these thoughts in mind, it is easier to decide on the technology one needs to use two-way radio.
Views: 98505 IntercomsOnline