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Telecommunications Knowledge

 

Some basic classification before purchasing a walkie-talkie
Benefits or Advantages of DMR (Digital Mobile Radio)
DMR Tiers
Network Radios work
A Network Radio
The Rise and Rise of Network Radios
Network Radios Data
Build to perfect hi-fi system
Used for DC Power Supply
A Power Supply Works
Power Supply
Wireless microphones work
Use a Stereo Mic on a Camera
Type of Battery
Commercial radio
FM Radio Without Headphones
Listening to Radio
SOFTWARE DEFINED RADIO
DMM, Digital Multimeter
Make Your Cell Phone Battery Last Longer
DMR Digital Mobile Radio
Choose Headphones
Operate Your iPhone Using Apple Earphones
Test to Earphones
Set Up a Simple One Microphone Sound System
Use a Microphone on a PC
Start Your Own Radio Station
Talk on a Radio
Choosing a Radio Channel
Use a UHF Radio
UHF versus VHF
Two-way radio --- Range
Other two-way radio devices
Two-way radio frequencies
What is Antenna
Build Antennas
AC adapter
The bluetooth audio adapter work
USB audio
Kinds of USB audio devices
Routing Audio
Typical set-up for SWR meter
Use the SWR meter
A bad SWR
Where to measure SWR
Types of Radio Receiver
Understanding the Software Defined Radio Receiver SDR
What SWR meter should I buy
EQUIPMENT COMMISSIONING
A voice coil on a speaker
Different speaker drivers
A speaker tweeter
Weatherproof Speakers Work
Cell-phone Implants Work
Choose Travel Power Adapters
Spotting the signs of AMD
Watch TV with an antenna
Need an electrical adapter when I travel overseas
Telescopic contact lenses to be trialled
Telescopic implants help
What is AMD?
Telescopic Lenses Work
Telescopic Lenses and Benefits
Difference between high fidelity and high definition
Radio Receiver Selectivity
The difference between active and passive speaker crossovers
A sealed speaker box enclosure work
The difference between LCD and LED
The communication distance of the walkie talkie
DMR a mass adoption phase winner in digital voice radio
DMR TRUNKING WORK (I)
DMR TRUNKING WORK (II)
DMR NETWORK GATEWAYS
Wireless walkie-talkie principle
DMR digital walkie-talkie standards and advantages
Trunked radio systemDifferences from conventional two-way radio
Trunked radio system
Two-way radio frequencies
Light Emitting Diodes Work
LED Light Bulbs Work
A wireless radio network save a miner's life
Digital Television Works
The walkie-talkie feature on a Nextel phone work
Diagnose & Repair Audio Speaker Problems
Walkie-talkies Work
The differences between walkie talkies and two way radios
Using Walkie-Talkies and Global Positioning System Devices in Country Parks
Simple walkie-talkie recommendations
How Ubiquitous Networking Will Work
Laptop battery be overcharged
Electric Car Batteries Work
Motivational Speakers Work
A CB radio antenna work
Virtual Surround Sound Works
DATA DRIVEN DECISIONS
BENEFITS OF INDUSTRIAL CONTROL SYSTEMS
The best sound out of my car's audio system
Compete in a car audio competition
How do I know which cables to use
Different connectors on my DVD player
Solar Battery Chargers Work
Tall skinny speakers work differently than regular speakers
More affordable to have a portable GPS system in your car 
The Different Types Of Mics And Their Uses (I)
The Different Types Of Mics And Their Uses (II)
Types of Microphones used in Music
Practical Microphone Applications in Music
Microphone/guitar only on the left
How to Test the Microphone/Sound Hardware on Motorola Phones
Two-way Canary Talk work
Why does my voice sound so different when it is recorded and played back
What is mic level ?
What is line level ?
Use Wireless Mics on A Regular Basis?
 
 

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