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Just wanted to add some pics of the counter with output for Geigerbot/IOS interface. Using some very small components I was able to assemble the audio circuit and seal it up with shrink wrap before soldering it to the board. Others designs that I've seen show a pin adapter that hangs off the board ...

Good day! I just wanted to share a few pics of the recent mods I made to my Geiger counter kit. After assembly I wanted to fit everything into a case that was approximately 5" x 3" x 2" so I broke out the hack saw and chopped off as much of the surrounding PCB as possible without cau...

I got my unit up and running with no trouble and set the proper voltage using a 1g resistor. The unit seems to detect my radioactive sources just fine, but if I leave the source near the counter for more than 20 seconds the clicks seems to continue to increase until the unit itself is left with a f...

Thanks for the quick reply. Sounds like all I would need to do is use the twin leads +/- for the tube and then ground the shielding. I'll post pics as soon as it's finished.
Cheers!

Hello and thanks in advance for any advice you have. I purchased the Geiger kit and wanted to make a probe out of a plastic flashlight case I had in the shop. My question is this: if I am using twinax type cable (3 lead instrument mic cable) for my probe (tube + and -, ground shield) is there anythi...