Hello, I've made this circuit out of a circuit I found in the web.
It is made in a pcb.
The values insinde the boxes are the real components i've used since I dont have that component value.
The idea is to make a channel to speak like a walkie talkie, but since I have no experience with RF I've decided to make a simple fm radio to start.
The antenna is 4 naked wires of a common copper cable twisted, it's 75cm long (2' 5").
It kind of works, I can hear the radio stations really soft under a lot of noise. Besides the radio station frequency changes really easily (when I move or when i touch the antenna). Even hovering my hand over the circuit changes the station.
VC1 Is a trimmer capacitor from 5.2 to 30pf
L1 is made of 8 turns of 22swg wire with 4.7mm inner radius air core.
Why is my circuit so susceptible to interference?
Thank you!
Edit: I've been tested and I notice I can use the antenna as a dial. If I press the antenna and move my finger along it I can change between stations and if I find the right spot I can hear the station really clear.
It is made in a pcb.
The values insinde the boxes are the real components i've used since I dont have that component value.
The idea is to make a channel to speak like a walkie talkie, but since I have no experience with RF I've decided to make a simple fm radio to start.
The antenna is 4 naked wires of a common copper cable twisted, it's 75cm long (2' 5").
It kind of works, I can hear the radio stations really soft under a lot of noise. Besides the radio station frequency changes really easily (when I move or when i touch the antenna). Even hovering my hand over the circuit changes the station.
VC1 Is a trimmer capacitor from 5.2 to 30pf
L1 is made of 8 turns of 22swg wire with 4.7mm inner radius air core.
Why is my circuit so susceptible to interference?
Thank you!
Edit: I've been tested and I notice I can use the antenna as a dial. If I press the antenna and move my finger along it I can change between stations and if I find the right spot I can hear the station really clear.
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