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Bluesberry

Is a longer antenna always better? Would extending this beyond 25cm improve the signal reception for this car? (Operating frequency is 40MHz)

Radio control car body with the internal antenna wire placed alongside a tape measure. The antenna is 25 centimeters long.
Apr 01, 2025, 06:55 AM·Public
0boosts·4favorites
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Andrew :hokkaido: :chikified:

@babababa depends on the wavelength. In this case, very unlikely.

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Chris Pearce

@piepants @babababa Sure, long enough, but does it have enough girth to impress?

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Bluesberry

@piepants Thanks for your input! It's rather convenient having an antenna dude around 😎

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Andrew :hokkaido: :chikified:

@babababa doubling the length *may* help, but often these things run on unlicensed frequencies and the distance is probably limited by power restrictions and nearby interference.

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Bluesberry

@piepants Another idea I have is to alter the design of the antenna.

Right now it's affixed to the interior of the car housing. If I drill a small hole in the housing and have the antenna protrude 7cm up from the body, I wonder if that might improve reception.

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Andrew :hokkaido: :chikified:

@babababa That should help a little. It will get it away from the electronics and motors which will be generating electrical noise.

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Bluesberry

@piepants Done! We'll try it out at the park tomorrow.

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