Alternative Hack for FM Transmitter
Intro: Alternative Hack for FM Transmitter
I also have a FM transmitter that I wanted to hack to improve its range following https://www.instructables.com/id/Hacking-FM-Transmitter/
Another step by step may be not necessary since it's just about soldering 2 wires, so I go with a photo album.
This alternative mainly shows a few differences:
- My transmitter's got hidden screw below black plastic cover. May be this model with 3 buttons always got this hidden screws?
- Instead of removing the capacitor (C2) near the antenna, I preferred to bypass it by soldering a small wire between antenna and closest connection (L1).
- You need to unsolder batteries connectors before being able to access the circuit board, then solder them again (many times for me) to test the new antenna (or maybe you can test with power-in connector?).
- I glued the antenna wire to the board because onboard "antenna" is fragile and a bend is enough to break it.
Some pictures are blurred because I don't have a decent macro camera, I switched to USB microscope but x20 is too detailed in this case.
Hope this helps other hacks! ;)
Another step by step may be not necessary since it's just about soldering 2 wires, so I go with a photo album.
This alternative mainly shows a few differences:
- My transmitter's got hidden screw below black plastic cover. May be this model with 3 buttons always got this hidden screws?
- Instead of removing the capacitor (C2) near the antenna, I preferred to bypass it by soldering a small wire between antenna and closest connection (L1).
- You need to unsolder batteries connectors before being able to access the circuit board, then solder them again (many times for me) to test the new antenna (or maybe you can test with power-in connector?).
- I glued the antenna wire to the board because onboard "antenna" is fragile and a bend is enough to break it.
Some pictures are blurred because I don't have a decent macro camera, I switched to USB microscope but x20 is too detailed in this case.
Hope this helps other hacks! ;)
9 Comments
ClearW 8 years ago
I have got a similar one but frankly, my Raspberry Pi offers better range and fidelity than this one. I get almost 300 ft with my Raspberry Pi.
ClearW 8 years ago
I got a similar one from dx and I get a range of around 80 ft out of the box. This was inside the building. I have to check the range out in the open.
jimvandamme 9 years ago
I have a car unit that I converted to use on my laptop.Inside it had an antenna terminal with no wire attached. I soldered a quarter wave wire (1 meter) to it and did a relative gain measurement with my spectrum analyzer. The transmitted power went up over 20 dB (that's 100 times). Since it was about the same as other stations in the area but only a few feet away, I figure that I'm safely within FCC limits.
alientango 9 years ago
raikut 11 years ago
phmanzano 11 years ago
phmanzano 11 years ago
Didn't tested outside yet.
Thanks to you :)
Awesome-aniac 11 years ago
phmanzano 11 years ago
Originally it's so low you'd prefer to get a wire.