Antenna Handbook

Which NETGEAR Unmanaged PoE Switch is right for you?

Gigabit Ethernet Ports with 5 Ports with 4 x PoE with PoE 55 Watt

Unmanaged Switch: Plug and play solution to connect all your network devices without the complications of configuration or management software -- yet achieve a reliable and secure network.



NETGEAR Unmanaged PoE Switch Advantages
Designed for Whisper-Quiet Operation: Most switch models are fanless or designed to minimize fan noise to protect your business environment.
Power Saving and Energy Efficient: We care about saving energy for your business so our switches are compliant with IEEE802.3az Energy Efficient Ethernet mode.
Plug-and-Play: No configuration necessary - perfect for small-medium businesses.

Smart Managed Plus: Empowers growing small businesses with basic capabilities to configure, secure, and monitor their network beyond simple connectivity at an affordable cost - an ideal upgrade from unmanaged switches.



GoPro Hero8 Black - Beyond The Next Level

 
Unshakable HERO camera ever. A streamlined design makes it more pocket able than ever, and swapping mounts takes just seconds, thanks to built-in folding fingers. And with the optional Media Mod, you get ultimate expand ability to add more lighting, pro audio and even another screen. There’s also game-changing HyperSmooth 2.0 stabilization with jaw-dropping slo-mo.

The camera has a voice control feature.The HERO8 Black has folding mounting fingers eliminating the need for a frame.A specific Floaty will also be available for the HERO8 Black.
  • Streamlined design: the reimagined shape is more pocketable, and folding fingers at the base let you swap mounts quickly. A new side door makes changing batteries even faster, and the lens is now 2x more impact resistant.
  • HyperSmooth 2.0: Smooth just got smoother. Now HERO8 Black has three levels of stabilization—On, High and Boost—so you can pick the best option for whatever you do. Get the widest views possible, or boost it up to the smoothest video ever offered in a HERO camera. Plus, HyperSmooth 2.0 works with all resolutions and frame rates, and features in-app horizon leveling.
  • TimeWarp 2.0: Capture super stabilized time lapse videos while you move through an activity. And now, TimeWarp 2.0 automatically adjusts speed based on motion, scene detection and lighting. You can even slow down the effect to real time—savoring interesting moments—and then tap to speed it back up.
  • LiveBurst: Record the moments 1.5 seconds before and after your shot, so you can choose the best single frame for the perfect photo—or an awesome shareable video.
  • HERO8 Black Mods: Vloggers, pro filmmakers, and aspiring creators can do more than ever imagined with quick loading accessories like flashes, microphones, LCD screens and more; Just add the optional media mod to up your capture game.

Best Sony TV Deals Bravia 85 Inch Works with Alexa


Sony HDTV 4K with HDR Technology and Processor X1 Ultimate Technology from Sony, with intelligent processing and ultimate realism , make Sony TV 85 Inch Enhanced have Contrast Brightness in color.

With 4K-X Reality Pro, you experience more natural picture and object based super resolution . Alexa inside Sony 85 Inch TV with Android Operating Systems and Amazon account , enable smart device connected and controlled via Alexa. You can talk with Alexa and asking Alexa to turn on or off your device , switch channel TV, show your front door bedroom via camera, and others smart devices connected to Alexa.


From Manufacturer Video Sony XBR85X950G X950G 85 Inch TV: 4K Ultra HD Smart LED TV with HDR and Alexa Compatibility . Check It Out !


Best Gaming Headset For Real Gamers

 Best Gaming Headset





















The Best Gaming Headset MPOW EG3 Pro Immerse yourself in games with this surround 
sound gaming headset. The microphone boom not 
only swivels but is also bendable, 
allowing you to place it exactly where you want it. You can quickly adjust mic and volume buttons 
without disrupting your game.

the Mpow gaming headset produces superior sound 
clarity and punchy bass for a wide soundscape. 
The metal 
frame headset is strong and durable enough to 
last a long sessions. The LED lights designed on ear cups 
are cool enough to highlight the atmosphere of the whole 
game.








Mpow Gaming Headset (2019 Edition)Sound quality— If you need to 

hear more audio cues, The Mpow EG3 Pro Gaming headphone will be 
your choice.
➤ 50mm speaker drivers and 20Hz-20KHz frequency response give 

you a more expansive sound profile.

Microphone—Having a high-quality mic means your teamwork will 

always be on point in the battle.

The headphone's microphone is very good and picks up voices with 

a clear, natural sound.

➤ Comfort—The large comfortable leatherette ear 

cups alleviate 
pressure around 
the ears over long 
periods of time.
Sound built for gaming: featuring 50mm speaker drivers, the Mpow 
Gaming headset 
produces superior sound clarity 
and punchy bass for a wide soundscape. 
Equipped with better Surround sound, The upgraded gaming headset
 brings you
 heightened aural awareness so you can hear every single detail— 

whether it is subtle footsteps or enemy gunfire



Cross-platform—this gaming headset is just 

phenomenal and compatible with PC, Mac, PlayStation 4, 
PlayStation 4 Pro, Xbox one, Xbox One S, Nintendo Switch, 
Nintendo 64 and etc.

Trouble shooting tips:
1. Check that the mic m
ute switch on the in-line controls is not set to "mute".
2. If you're connected to a computer, you need to connect the

 headset to the computer through a 2-in-1 audio aux cable 
(included).






Specification
【1】Speaker size: 50mm
【2】Sensivitity: 103+/-3dB
【3】Frequency range: 20 Hz-20KHz 

【4】Microphone: 6. 0x 5. 0mm
【5】Microphone sensitivity: -38+/-3dB
【6】Directionality: omni-directional 【7】Cable length: 2. 2M +/-0. 15
【8】LED working voltage: DC 5V +/- 5%
【9】Headset jack: USB+3. 5mm 4 Pin 【10】System support: The 32-bit and 64-bit Win 7/Win8/Win8. 1/Win
10/XP/Mac/PS4/PS4 SLIM/PS4 PROXBOX ONE/XBOX ONE S/XBOX ONE X

Zero Energy Device Example

“Free-Energy Devices” or “Zero-Point Energy Devices” are the names applied to systems which appear to produce a higher output power than their input power.  

There is a strong tendency for people to state that such a system is not possible since it contravenes the Law of Conservation of Energy.  It doesn’t.  If it did, and any such system was shown to work, then the “Law” would have to be modified to include the newly observed fact.  No such change is necessary, it merely depends on your point of view. 

For example, consider a crystal set radio receiver:


Fig 1 . Crystal Set


Looking at this in isolation, we appear to have a free-energy system which contradicts the Law of Conservation of Energy.  It doesn’t, of course, but if you do not view the whole picture, you see a device which has only passive components and yet which (when the coil is of the correct size) causes the headphones to generate vibrations which reproduce recognisable speech and music.  

This looks like a system which has no energy input and yet which produces an energy output.  Considered in isolation, this would be a serious problem for the Law of Conservation of Energy, but when examined from a common sense point of view, it is no problem at all.   


The whole picture is: 
Fig 2. Crystal Set whole Picture

Power is supplied to a nearby transmitter which generates radio waves which in turn, induce a small voltage in the aerial of the crystal set, which in turn, powers the headphones.  The power in the headphones is far, far less than the power taken to drive the transmitter.  

There is most definitely, no conflict with the Law of Conservation of Energy.  However, there is a quantity called the “Coefficient Of Performance” or “COP” for short.  This is defined as the amount of power coming out of a system, divided by the amount of power that the operator has to put into that system to make it work.  In the example above, while the efficiency of the crystal set radio is well below 100%, the COP is greater than 1.  

This is because the owner of the crystal radio set does not have to supply any power at all to make it work, and yet it outputs power in the form of sound.  As the input power from the user, needed to make it work is zero, and the COP value is calculated by dividing the output power by this zero input power, the COP is actually infinity. 

 Efficiency and COP are two different things.  Efficiency can never exceed 100% and almost never gets anywhere near 100% due to the losses suffered by any practical system. 

Reference :https://www.free-energy-info.com/