This is going into "beginners" since i suspect my question will have a very stupid answer
Just to see if there's a big difference from "cheap chinese receiver" and superheterodyne receiver, i bought this from DX
http://www.dx.com/p/315-mhz-433-92-mhz- ... WLYhtLtlYQ
(Obviously i already got one of these some months ago http://www.dx.com/p/433mhz-rf-transmitt ... WLZttLtlYQ )
Now, as you can see the new module has a group of 3 pins that are gnd, 5V and data. This is not a problem even for me
But why the hell there is another couple of pins for antenna?? i always connected only ONE wire as antenna to 433MHz receivers (and transmitters), why is this asking for a ground too?