The tests performed here are an attempt to identify the usable frequency range of the connifer antenna. The test is done with a Level-Stabilised sweep generator driving a homebrew broadband bowtie antenna. the output is detected via a simple homebrew Diode-Detector. the DC sweep voltage from the sig gen drives the horizontal axis of a CRO while the output of the detector drives the vertical axis. Simple enough! the limitations are as follows.

The antenna and it's proximity coupling offer no true measure of gain versus frequency just an indication of wether it is working at a particular frequency or not will have to do for now. Similarly, the detector is a homebrew unit that I have swept using a tracking generator and spectrum analyser and seems to be prety good up to 800mhz. Since it is only monitoring the downconverted signal there should be no problem. It does mean however that the cro displays a linear response only.
 

The Frequencies of interrest are from left to right. and measured where the signal starts to peak.

1.    2050Mhz
2.    2100Mhz
3.    2300Mhz
4.    2401Mhz

As you can see it just scrapes it in.
 

With the ceramic filter block removed sensitivity dropped and the bandwidth narrowed. Hmmm. Those pieces of wire just don't cut the custard. One could do better with a proper microstrip but I have better things to do at the moment.
 

With the shortest of the ceramic blocks placed in after grinding down about 2mm shorter 2401Mhz  peaks. The good oil!!!
This is not to say that it is any better than the un modified unit. My measurements are indicators not quantitive measurements.

Important If it works on 2401 without modification then don't open it up! it's a lot of mucking around.