Hello everyone,

Recently, I acquired a Philips 18504 with a probe and cable. However, I'm not entirely sure how to use it. After disassembling the probe and examining the tube with the circuit, I noticed that it has six connections. Does anyone know what the colors of these connections might represent in the circuit? Has anyone had prior experience with this type of probe? Any help or a datasheet would be greatly appreciated.

Thank you!

 

https://www.radiomuseum.org/tubes/tube_18504.html

This might be of some help..

 

That tube is clearly just the detector tube. and evidently there is not the rest of the detector it was used with on hand.
The good news is that there is no universally used color code for functions, so no need to waste time with that chase. Probably there is some electronic on the other side of the PCB that can be analyzed by those able to do that sort of thing.

Otherwise, it is just a simple matter of setting the tube bias at about 900 volts and then amplifying the current pulses every time a gamma ray ionizes a trail thru the tube.