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