help me pls.......iam am a beginner of this field

[AND_ECE]

hello.............po!!
can you help me to build a simple transistories fm transmitter suitable to transit....
and has a range of 1000 meter
pls. help me.......

 

[xxxxxxxxxxxxxx]

Please just google these things. It took me about 10 seconds and I've already got a circuit. as for the 1000metre thing, you will probably want to boost the arial output. Alternatively, you could use circuits like **broken link removed** (also found on, would you believe it, google. Just search 1000 meter fm transmitter)

please note, that without a license to operate these transmitters, they may be illegal in your country ( maximum 10meters without a license is common).

 

[audioguru]

The Talking Electronics Voyager FM transmitter circuit is the same lousy circuit as hundreds of other simple FM transmitter circuits on the web:
1) It hardly has any output power. It won't go 800m, it might go to across the street!
2) Its frequency will change whenever anything gets near its antenna because it is conneceted directly to the oscillator's tuned circuit.
3) It will sound lousy without treble when heard on an FM radio because it doesn't have pre-emphasis.
It is a toy.

 

[xxxxxxxxxxxxxx]

Hmmm, guess not then. although, there are others out there, just have a look. If you're interested, there may be kits availiable from your local dick smith or whoever supplies them where you are. I know there is on ehere in oz under the name 'mini-mitter' its FM and intended for proper use (not a toy).

 

[things]

i have the minimitter, but it's range is only 10m or so. why do you need it to transmit 1km? that would be illegal?

 

[audioguru]

In Australia, Silicon Chip magazine published The Micromitter FM stereo transmitter project. Its performance is very good. It has an attenuator on its RF output so it doesn't break the law about a signal that is too strong. The attenuator is easily removed for a much farther range.
Kits are available.
https://electronics-diy.com/schematics/BH1417_fm_transmitter.htm
https://electronics-diy.com/BH1417_PLL_Stereo_FM_Transmitter.php

 

[xxxxxxxxxxxxxx]

that seems to be what I am talking about. Thx for that audioguru

 

[xxxxxxxxxxxxxx]

hey- look what I found in an old textbook... this advertses "..and can transmit up to one mile"

**broken link removed**
**broken link removed**

 

[xxxxxxxxxxxxxx]

sorry about the really big pictures... how do I turn them into a thumbnail?

 

[bananasiong]

sorry about the really big pictures... how do I turn them into a thumbnail?

Upload it to electro-tech-online.

 

[audioguru]

That very simple FM transmitter circuit has hardly any output power. It might transmit across the street but certainly not 1 mile.