Mini FM Transmitter MAX2606
With MAX2606 we can make a small mono fm transmitter. It is build with MAX2606 and covers at least 20m with 1.5 m long copper wire antenna. You can use this transmitter as an oscillator but change the 1000pF capacitor from the antenna with 15pF.
MAX2606 transmitter output power is -10dBm, that means something around 100uW (micro-watts) = 0.0001W. Of course this is very low, that’s why we recommend you to use an auxiliary power amplifier if you want to build a more powerfull transmitter based on MAX2606. You can find a few fm power amplifiers on electroschematics.com so please use the search box.
Max2606 transmitter circuit diagram
about 1 year ago
This is a great transmitter, I’ve tried it and works great. The only problem is buying MAX2606.
about 6 months ago
hey dont u think the max 2606 is too small..and how did u manage to mount it on a PCb oe a Bread Board…any ideas on how to maount it plz mail it to me
about 1 year ago
Excellent little circuit. The MAX2606 can be purchased directly from http://www.maxim-ic.com. Use the MAX2471 after it (very simple, the ‘2471 was designed to work with the ‘260X series) to boost output power to +4dBm. This is 25mW, or about 1 Volt into a 50ohm load.
about 9 months ago
hi,
well the circuit works but on the receiver volume is quite low… how do i boost the volume? because i have to turn the receiver volume around 80% then i can here something.
about 6 months ago
hey dont u think the max 2606 is too small..and how did u manage to mount it on a PCb or a Bread Board…any ideas on how to mount it plz post it here
about 4 months ago
This design was chosen and built by me and others in an EE course. It works well, and has a range of 15~20 meters. We used a 9V battery through a LM7805 5 volt regulator as the power supply. See LM7805 datasheet for an example of how to use the regulator.
All components were surface mounted, and reflowed. Soldering the MAX2606 to a PCB by hand may be possibble if you use solder paste that you reflow with your soldering iron.
It can be smart to tune R1 so that the TUNE input on the IC has 1.4 V. That will place the output frequency in ‘the middle’, close to 100MHz.