Electronics Projects, BH1415 FM Transmitter RF Amplifier Output to Up article
"analog circuits projects, " tagged with
BH1415F stereo FM transmitter integrated based on an FM transmitter device output güçlendr made to a circuit .. FM transmitter used in the RF amplifier circuit 2N5770 (instead NTE108 or other provisions) MRF515 (2N5943 or NTE77) transistors based on the 12v power supply is working with. Author modifying RF amplifier with 10 meters to about 5 miles off the transmitter power has been
The FCC says only 150uV/meter at 10 meters is allowed so I’m guessing any more power than what this has could not be FCC certified and sold at retail outlets nationwide. Example of a complete TuneCast system with all cables attached. RF output power is about 120 milliwatts. Although not verified with this setup previous road tests have shown this much power can be heard up to 3 miles away using an outside 1/2 wave vertical transmitting antenna.
Source: sonic.net/~n7moe/BelkinMod.htm alternative link: bh1415-fm-transmitter-rf-amplifier-output-to-up.rar