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Old January 30th 06, 10:54 PM posted to rec.radio.amateur.antenna
Steve Nosko
 
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Default Increase range on 433 Mhz transmitter

Make a "dipole" out of just OVER 1/2 wave of wire. Then form the center
into a single turn loop and couple it to (bring it near) the loop in the
unit.

Steve, K9DCI



"Carsten Hjorth" wrote in message
...
Hello!

I just bought this: http://www.rustindustries.co.uk/remote.htm
The range is only 10-15 meters in free air, only 5-7 meters indoor.
Is it possible to connect a whip type antenna?
I have calculated a length ca 17 cm.
But i cannot see where to connect the antenna.
The transmitter has a loop style antenna, powered by one transistor and a
oscillator of some sort, i have drawn a schematic:
http://media.openbloc.com/1tpwr
I have tried to connect the antenna to the collector, but that gave me no
output at all.

Regards

Carsten Hjorth




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