Audio amplifier vs Amplifier

Thread Starter

Avijit Palit

Joined Jul 19, 2017
81
What is the difference between audio amplier vs normal amplifier?
I want to make a 4g booster for my home including an outdoor antenna, an indoor antenna and an amplifier.
But should I use simple audio amplifier or high watt amplifier.
Sorry for stupid english.
 

MrChips

Joined Oct 2, 2009
25,933
What is the difference between audio amplier vs normal amplifier?
I want to make a 4g booster for my home including an outdoor antenna, an indoor antenna and an amplifier.
But should I use simple audio amplifier or high watt amplifier.
Sorry for stupid english.
Audio amplifier is designed to operate in the audio frequency range, 0-20kHz.
For 4g you need an RF amplifier.
 

wayneh

Joined Sep 9, 2010
17,167
I want to make a 4g booster that need an amplifier.
And Is it possible to make an amplifire using 3 or 4 transistor?
The short answer is no.

A 4G amplifier is not a DIY project and would be a major challenge for even a professional engineering team.

Someone may now come along and prove me wrong but I’m not holding my breath.
 

Thread Starter

Avijit Palit

Joined Jul 19, 2017
81
The short answer is no.

A 4G amplifier is not a DIY project and would be a major challenge for even a professional engineering team.

Someone may now come along and prove me wrong but I’m not holding my breath.
So it not possible to boost 4g signal using audio amplifier. And I am looking for simple RF booster circuit.
 

wayneh

Joined Sep 9, 2010
17,167
So it not possible to boost 4g signal using audio amplifier.
Correct, it's not even close. Even a high-end audio amplifier will be designed for frequencies below 50-100kHz. A cheap amplifier may not even reach 20kHz.

4G is not a single frequency, but any frequency carrying 4G is far, far higher than audio frequencies. For instance my T-Mobile 4G here in the U.S. is 1.9GHz, I think. The booster you want would need to match the frequency of 4G provided by your carrier at your location.

And I am looking for simple RF booster circuit.
That may be like saying you want a simple way to get to Mars. No such thing.
 

Thread Starter

Avijit Palit

Joined Jul 19, 2017
81
Correct, it's not even close. Even a high-end audio amplifier will be designed for frequencies below 50-100kHz. A cheap amplifier may not even reach 20kHz.

4G is not a single frequency, but any frequency carrying 4G is far, far higher than audio frequencies. For instance my T-Mobile 4G here in the U.S. is 1.9GHz, I think. The booster you want would need to match the frequency of 4G provided by your carrier at your location.

That may be like saying you want a simple way to get to Mars. No such thing.
Then how this things works without amplifier
==>Link==> http://www.instructables.com/id/DIY-2G3G4G-Wireless-Cell-Phone-Signal-Booster/
 

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