Hi all,

I built a quick device for a friend that lets a receptionist send=20
messages from a PC to a desktop display device, and vice-versa with a=20
handful of canned responses.  The PC side uses VB to serial (via USB),=20
to a USB-to-serial interface, then a 433 Mhz serial module, through an=20
IPEX-to-RP-SMA interface, to a short whip antenna.  The desktop display=20
device also has the same 433 Mhz serial module (controlled by an=20
Arduino), to the same IPEX-to-RP-SMA interface cable, then to an=20
identical whip antenna.

I'm not getting the range necessary... I'm getting 35-ish feet indoors=20
(through one wall), and need about 100 feet indoors (in an office=20
through a glass wall).  I've tried a 433 Mhz PCB antenna, but that got=20
me less distance than the whip antennas.  And the whip antennas are=20
listed as being for 433 Mhz.

Any clues on how to get better distance?  I'm looking for 433Mhz=20
amplifiers, but they're a bit pricey.  I'm short on time, so hoping to=20
find a ready-made solution (if an amp is necessary), rather than having=20
to build one.

Cheers,
-Neil.


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