The Best Homebrew vertical antenna 40m band from YC2YIZ

Homebrew vertical antenna 40m band - To determine how much tubing we will need, we have to figure out how long a quarter wave is at forty meters . Using λ/4 (feet) = 246/f (MHz) and then converting the fraction of a foot which remains to inches, we get λ/4 = 33,10 inches for a center frequency of 7,265 MHz. Any center frequency can be chosen by placing that frequency in place of f in the formula.

This homebrew vertical antenna 40m band from Edy Karsono (YC2YIZ) , this antenna also work for 15m band, beside 40m band. Edy used MFJ analyzer to measure the SWR. 

Black Friday Cell Phone Deals 2021

Biggest deals of every end the year have arrived. Our experts have check out thousands of discounts to find best suitable itmes for you that worth it. 

1. Motorola Edge - 2021

With Processor Qualcomm Snapdragon 778G , Unlocked for the freedom to choose your carrier. 5G service available with 5G plan. 5G network coverage required; available only in select areas. Compatible with T-Mobile 5G and Verizon 5G.

Ready for 5G on other select networks dependent on availability; contact your service provider for details. Compatible with all major 4G U.S. carriers, including Verizon, AT&T, and T-Mobile. It also works with prepaid carriers, including Cricket Wireless, Metro by T-Mobile, Simple Mobile, Total Wireless, Tracfone, Net10, Mint, TracFone, Boost, and H2O.

Specification :

Model Name             Motorola edge

Wireless Carrier     Unlocked for All Carriers

Brand                     Motorola

Processor                  Qualcomm Snapdragon 778G

Rear Camera             108 MP

Front Camera            32 MP

Form Factor            Smartphone

Memory Storage 

Capacity                    8 GB + 256 GB

Operating System    Android 11

Color                    Blue

Cellular Technology GSM

Network                     5G

Battery                       5000 mAh (2 Days )

Year                    2021

Screen Size            6.8 Inches

2. Samsung Electronics Galaxy Z Fold 3 5G

Model Name                          Z Fold 3 5G

Wireless Carrier                  Unlocked

Brand                                  Samsung Electronics

Form Factor                          Foldable Screen

Memory Storage Capacity 12 GB

Operating System                 Android

Color                                 Phantom Black

Cellular Technology         5G

Year                                 2021

Screen Size                         7.6 Inches

3. SAMSUNG Electronics Galaxy Z Flip 3 5G

Model Name                         Z Flip 3 5G

Wireless Carrier                 Unlocked

Brand                                 Samsung Electronics

Form Factor                         Flip

Memory Storage Capacity 8 GB

Operating System                 Android

Color                                 Phantom Black

Cellular Technology         5G

SIM card slot count         Single SIM

Battery                                     3300 mAh

Front Camera                         10 MP

Main Camera                          12 MP                        

Year                                 2021

4. OnePlus 9 Pro Morning Mist

Hasselblad Camera for Mobile - Take your best shot with the OnePlus 9 Pro 5G’s Quad Camera system co-developed by Hasselblad, featuring a 48MP main camera, 50MP Ultra-Wide camera, 8MP telephoto camera, and 2MP monochrome lens

Qualcomm Snapdragon 888 - Powered by the most powerful Snapdragon platform yet, the OnePlus 9 Pro 5G delivers fast and smooth performance across every app

Model Name             OP9 Pro

Wireless Carrier     Unlocked

Brand                     OnePlus

Form Factor             Bar

Memory Storage 

Capacity                     256 GB

Operating System     Android 11

Color                     Morning Mist

Cellular Technology  5G

Screen Size             6.7 Inches

Manufacturer             Oneplus

5. Xperia 1 III - 5G Smartphone

ZEISS optics calibrated specifically for your Xperia smartphone. The ZEISS T* coating contributes to exquisite rendering and contrast by reducing reflections.

The Xperia 1 III is powered by the Qualcomm Snapdragon 888 5G Mobile Platform to deliver the premium experiences you deserve.

Model Name               XQBC62/B

Wireless Carrier       Unlocked

Brand                       Sony

Form Factor               Bar

Memory Storage 

Capacity                       256 GB

Operating System       Android 10.0

Processor                    Qualcomm Snapdragon 888

Color Black

Cellular Technology   5G

Year                      2021

Screen Size              6.5 Inches

6. Tracfone Samsung Galaxy A51 4G LTE

You don't want to be locked into a contract, that's why Tracfone doesn't have them. Plus, there are no activation or cancellation fees.

Tracfone runs on one of the largest and most dependable networks in America - the same networks as the bigger carriers.At Tracfone, your unused texts, talk, and data never expire with active service*.*Service must be active and in use within any six month period.

Tracfone plans are always convenient. You'll never have any bills, overages or mystery fees; Just great value without a commitment.

Best Laptop Deals Black Friday 2021

1. SAMSUNG Galaxy Chromebook 4 11.6-inch

The quality of Samsung meets the accessibility of Chrome OS. Its all-new light and compact design lets you stream, work, create, and play on a fast, secure device designed to take everywhere. You can download and save content and work with others using Google Suite. Built with long-lasting battery and Gigabit Wi-Fi connectivity, the new Samsung Chromebook 4 brings speed and efficiency to any and every task or adventure.

Specification :

Operating System     Chrome OS

Processor                  Intel Celeron Processor N4000

System Memory        4GB LPDDR4/4GB x 1, Max 4GB

Storage                      64GB eMMC

Display                       11.6" HD LED (1366 x 768)

Military Grade Durability

2. Lenovo Chromebook Flex 3 11" Laptop, 11.6-Inch HD (1366 x 768) IPS Display

Specification :

Series                  Ideapad Flex 3  Chromebook

Brand                  Lenovo

Specific Uses 

For Product             Personal

Screen Size          11.6

Operating System  Chrome OS

Human Interface 

Input                  Touchscreen

CPU Manufacturer Mediatek

Color                 Blizzard White

Connectivity 

Technology         Bluetooth, Wi-Fi, USB, HDMI

Hard Disk Size 64 GB

3. LG LCD Laptop 14" 2-in-1 WUXGA (1920x1200) IPS Touch Display

Specification :

Series                     14T90P-K.AAG9U1

Brand                      LG

Specific Uses 

For Product             Multimedia, Personal, Business

Screen Size             14 Inches

Operating System     Windows 10 Home

Human Interface 

Input           Touchscreen, Touchscreen with Stylus Support

CPU Manufacturer      Intel

Color                     Green

Connectivity 

Technology             Bluetooth, Wi-Fi, USB

Hard Disk Size     1 TB

4. Samsung Electronics Galaxy Book Pro Windows 11 Intel Evo

Specification 

Brand ‎                                      Samsung Electronics

Series                ‎                       Galaxy Book Pro

Item model number       ‎              NP950XDB-KE5US

Operating System                       Chrome OS

Item Weight ‎                              2.31 pounds

Product Dimensions                   13.99 x 8.89 x 0.46 inches

Item Dimensions LxWxH            13.99 x 8.89 x 0.46 inches

Color                               ‎        Silver

Processor Brand        ‎               Intel

Processor Count                       1

Flash Memory Size                      512

Optical Drive Type     ‎                  No Optical Drive

Power Source                 ‎       Battery Powered

Batteries                 1 Lithium ion batteries required. (included)

Standing screen display size      15.6 Inches

Max Screen Resolution        1920 x 1080 Pixels

Processor                       ‎         2.8 GHz apple_ci7

RAM                         ‎              16 GB LPDDR4

Hard Drive                 ‎              SSD

Chipset Brand                        ‎Intel

Card Description                        ‎Integrated

Wireless Type ‎                       Bluetooth, 802.11ax

Number of USB 2.0 Ports        3

Average Battery Life (in hours) ‎10 Hours

5. Samsung Galaxy Book Pro Windows 11 Intel Evo Platform Laptop Computer 13.3" AMOLED Screen

Specification :

Brand ‎                               Samsung Electronics

Series                ‎                      Galaxy Book Pro

Item model number               ‎     NP930XDB-KH3US

Operating System                      Windows 11 Home

Item Weight ‎                             1.92 pounds

Product Dimensions                  11.98 x 7.87 x 0.44 inches

Item Dimensions LxWxH           11.98 x 7.87 x 0.44 inches

Color                         ‎              Silver

Processor Brand        ‎               Intel

Processor Count                 ‎      1

Flash Memory Size                      256

Optical Drive Type     ‎                   No Optical Drive

Power Source                        ‎Battery Powered

Batteries                 ‎                 1 Lithium ion batteries required. (included)

Standing screen display size ‎13.3 Inches

Max Screen Resolution         ‎1920 x 1080 Pixels

Processor                 ‎                2.4 GHz apple_ci5

RAM                         ‎                8 GB LPDDR4

Hard Drive                 ‎                SSD

Chipset Brand                         ‎Intel

Card Description                         ‎Integrated

Wireless Type ‎                        Bluetooth, 802.11ax

Number of USB 2.0 Ports         ‎3

Average Battery Life (in hours) ‎10 Hours

The Best Chromebook Laptop 2021

What is a Chromebook?

Chromebooks aren’t like other laptops. They run Chrome OS, an operating system made by Google. They are powerful, so they can handle what’s important to you and designed in a way that makes them easy to use. Watch this video to learn even more about the new way to laptop.

Chrome OS is the speedy, simple and secure operating system that powers every Chromebook.

How do I make the switch?

Switching from Mac or Windows is as easy as logging in. In just three simple steps, you’ll find your files and photos ready to go on your new Chromebook.

How to switch ?

Switching is as easy as 1, 2, 3. By using your Google account, you can transfer everything from your old computer in three simple steps.

Step 1

Sign in to your Chrome browser

First, grab your old Mac/Windows computer and make sure you're signed in to your Chrome browser with your Google account. This way all your bookmarks, passwords and settings will be saved for the switch.

Step 2

Back up your content, Files, photos, and videos

To quickly and safely back up your files, photos, and videos, download Drive for desktop and sign in with your Google account. Then select the folders 

and devices you want to upload to Drive, Photos, or both. You’ll also be able to upload your Apple Photos Library to Google Photos. If you don’t want to download Drive for desktop, you can back up your files to an external hard drive which you can later connect to your Chromebook.

Step 3

Sign in to your new Chromebook

Make sure you’re using the same Google account that you used in Steps 1 and 2. You should find all your files ready and waiting when you open Google Drive. 

If you used an external hard drive, connect it to your Chromebook. To start listening to your music, either download the YouTube, App, or launch Apple App and sign in with your Apple ID.

Simplicity 

Simple setup, Setting up your new Chromebook is easy. Just log into your Google Account and you’ll find all your Google Drive files and Chrome preferences on your new Chromebook.

Speedy

Ready when you are Chromebooks boot up in seconds, and with automatic updates you get the latest software without being interrupted.

Secure

Security, built-in.With features like built-in virus protection and secure support for multiple users, Chromebook keeps you and your data protected.

We picks several chromebook for you

1. Acer Chromebook Spin 713

2. ASUS Chromebook Flip C436

3. Google Pixelbook Go

4.  Acer Chromebook Spin 13

5. Lenovo YOGA Chromebook C630

6. ASUS Chromebook Flip C434

7.  HP Chromebook x360 14c

more about Chromebook 

The Best Netgear Orbi Mesh Wi-Fi Systems

Forget about Internet blank spot in your home and office . WiFi Mesh Systems, Faster speeds, greater coverage. WiFi that handles all your connected devices without any slowdowns.

No more dead zones, dropped connections, or buffering. Cover every square inch of your home with smooth, reliable, best-in-class WiFi

Orbi Wi-Fi 6 is a tri-band Wi-Fi System built with the latest and fastest Wi-Fi 6 technology to provide the ultimate smart home experience with Wi-Fi coverage and connection capacity beyond belief.

Keep all Wi-Fi connections strong in every room All the time with enough bandwidth for all your devices Multiple 4K/8K UHD streaming for your Wi-Fi connected speakers. 

Fast online Zoom, Meeting Smart lights Wi-Fi security devices and more Dedicated quad-stream Wi-Fi 6 backhaul allows for streaming 4K or 8K videos without delay Ideal for Gigabit and Multi-Gigabit Internet speed service supporting up to 2 5Gbps download speeds.

Place the satellite anywhere in your home to get Gigabit speeds where you want them.

Easy Setup, Router+Satellite create a mesh network for whole home WiFi coverage without dead spots.

There are two type of WiFi Mesh Solutions from Netgear , Home Solutions and Business Solutions.

For Home Solutions

1. Orbi Tri Band Mesh WiFi 6 Systems, 6 Gbps RBK852, covers 5,000 sq.ft.

NETGEAR Orbi Whole Home Tri-band Mesh WiFi 6 System (RBK852) – 1 Router with 1 Satellite Extender , Get coverage up to 5,000 sq. ft. of coverage and 6Gbps of blazing-fast, consistent WiFi speeds. 

Simultaneously stream, game and video call on 100+ devices in every corner of your home.

2. NETGEAR Orbi Whole Home Tri-band Mesh Wi-Fi 6 System (RBK853) 

The most popular mesh WiFi solution. Cover up to 7,500 sq. ft. with blazing-fast, powerful WiFi with speeds of up to 6Gbps for over 100 devices. Stream, browse, and work uninterrupted throughout your home.

No more dead zones or buffering – just smooth, reliable whole home WiFi.

Router with 2 Satellite Extenders, Coverage Up to 7,500 Square Feet, 100 Devices, AX6000 (Up to 6Gbps)