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Old 03-25-2004, 01:54 AM
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grmckauge
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Join Date: Feb 2004
Location: CairnsQueensland, AUSTRALIA
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Default RC Radio antenna (special application)

I have constructed a highly miniaturised device which fits into a 'lawn bowl' (not so common in the USA) to apply radio control for coaching purposes. It employs a Hitec Feather receiver with HS-55 servo controlled by a Hitec Ranger 3 Sky FM transmitter on 36Mhz.

No conventional wire antenna is possible as nothing must protrude from the bowl surface and the bowl material has an insulation effect. Reliable reception at 150' would be acceptable instead of the possible 1000'.

Solid aluminium end caps of 2' diameter wired to the receiver give only 50'. The supplied 40' wire coiled flat and mounted on the endcap gives about 60'. Lots of options such as a modified 'loaded antenna' but my knowledge is very limited.

Any suggestions on how this problem could be approached would be greatly appreciated by an isolated Aussie.