Electronics > Beginners

FM antenna

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fixit7:

--- Quote from: MarkF on May 27, 2019, 09:34:33 pm ---
--- Quote from: fixit7 on May 27, 2019, 09:21:22 pm ---Is there anyway to test my balun?

--- End quote ---
I doubt that it is bad.
I believe they are just a transformer inside.
For a sanity check, you can check continuity between the input terminals and between the output terminals.

--- End quote ---

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james_s:
There are all kinds of antenna designs out there, usually I find that a simple piece of wire works adequately for FM broadcast. If there is a specific station that you wish to receive then you can optimize for the frequency it is transmitting or a directional antenna can improve reception from a specific area. It's all a matter of compromise, you can have an antenna that does a fair job of a lot of things or you can have one that does a good job at one specific thing or set of circumstances.

fixit7:
I am using this. It picks up many FM stations in stereo.

https://www.dropbox.com/s/6kuf4bgb9f32p8q/dipole_Antenna.jpg?dl=0

But there is one station (90.5 MHz) that I can only hear in mono.

Would it help if I extended the length of the two pieces of the 2 wires at the top of the Y?

https://www.dropbox.com/s/ueual4kkympw5nm/Fm_Radio_Antenna.jpg?dl=0

Thanks.

james_s:
That's just a basic dipole, you could measure it and see whether you'd want to extend or trim it shorter in order to optimize it for the wavelength you want. You'll likely find that location and orientation has a greater effect than length.

fixit7:
thanks.

I will try mounting it at different angles.

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