No signal from my geiger tube
Posted: Fri Apr 20, 2018 1:01 am
Hi everyone,
I've seen that some of you are experienced with geiger tubes, could someone help me plz ?
I bought a geiger tube (CTC-5) some weeks ago and tried to connect it properly:
I downloaded the datasheet and made my own circuit:
I'am using a 4.5V battery, which is boosted to 5V then to 380V;
then i connected a 6,8 Mohm resistor (R1), my geiger tube, then a 100k resistor (R2) and back to the ground.
With an oscilloscope, i checked the signal between R2 and the ground: where i should get sometime 5V , i have nothing.
I tried to replace short-circuting my tube by connecting R1 to R2, and then i get my 5V signal.
I tested my circuit with another tube, and i still have the same problem.
Is there something wrong i'm doing ?
Thanks,
I've seen that some of you are experienced with geiger tubes, could someone help me plz ?
I bought a geiger tube (CTC-5) some weeks ago and tried to connect it properly:
I downloaded the datasheet and made my own circuit:
I'am using a 4.5V battery, which is boosted to 5V then to 380V;
then i connected a 6,8 Mohm resistor (R1), my geiger tube, then a 100k resistor (R2) and back to the ground.
With an oscilloscope, i checked the signal between R2 and the ground: where i should get sometime 5V , i have nothing.
I tried to replace short-circuting my tube by connecting R1 to R2, and then i get my 5V signal.
I tested my circuit with another tube, and i still have the same problem.
Is there something wrong i'm doing ?
Thanks,