s wrote:

...
i think it runs at 27Mhz. there is a little can on the underside which
has 27.045 on it.

the current antenna laid on the pcb is shaped thus
http://www.geocities.com/ymailus/pcb.JPG

thx

Some of the "more to it" is that at 27Mhz, you are not going to add on
anything I can think of which will improve distance--all I see is that
you will detune circuit and antenna and degrade performance. (at least,
in a usable way)

At 900Mhz and above, a complete antenna can consist of a "bread tie" and
performance can be improved.

Let's see if any others have some thoughts ...

Regards,
JS