This is still under construction and progress. So far, the result was not as expected. Perhaps need to do more experiment ..
After placement in an aluminium box.
Update :
The previous result is not as expected, so I made an update PCB.
Top ground plane was removed.
I think this one has better response over HF and VHF. At 2m band, the response is quite flat at -30 dBm.
On HF, the attenuation varies (as expected) and should be printed and referenced when using it on HF.
So, I am happy with it. Ready to be used to monitor spectrum output from my RF experiments.
After placement in an aluminium box.
Update :
The previous result is not as expected, so I made an update PCB.
Top ground plane was removed.
I think this one has better response over HF and VHF. At 2m band, the response is quite flat at -30 dBm.
On HF, the attenuation varies (as expected) and should be printed and referenced when using it on HF.
So, I am happy with it. Ready to be used to monitor spectrum output from my RF experiments.
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