[Electronic Eavesdropping Devices Detector]

Hi audioguru and all o' ya...

I think that the mistake I made initially was to assume that the schematic is incorrect and not the PCB.

I built the whole project *on breadboard*, according to the schematic. I would suppose that this is why it wouldn't work. When dealing with such high frequencies such as 1MHz-1GHz, breadboard testing won't work...

Fore sure, I know that there is an error on the schematic (D1 is used to label a capacitor) but I dont know whether the schematic was indeed the right one for this project.

The strange thing is that when I checked the schematic on the 'Smartkit' website, I found the very same schematic for Kit #1154.

Think I'll try a new approach and let you all know my results.
Thanks again..

The Duke,
South Africa

[Electronic Eavesdropping Devices Detector]

I should've been more clear about what I said earlier.

- I built the project according to the schematic and not the PCB.
- Afterwards, I realized that the schematic and the PCB on this website don't correspond.
- I then changed the project to correspond to the PCB layout.

In response to audioguru's questions:

1) I used an LM324, 14-pin IC as a substitute, instead of the "IC1 = 

[Electronic Eavesdropping Devices Detector]

Hi everybody, I'm new to this forum.

I built the rf sniffer circuit only to find that it didnt work - the schematic doesnt match the actual PCB layout at all. Take a second glance! When I built the circuit according to the PCB layout, including enclosing it in a metal box, I found that it was just sounding continuously... It only responded to my cellphone while I was making a call, and when it was held within inches from the device. Any clues as to what problems I may have encountered?