Hi,

I am looking for the SI-22G tube its dead time but can’t seem to find it.

From Radu’s personal site PocketMagic I can find it for the SMB-20 which is:

Minimum Dead Time (at U=400V, micro sec): 190

Wondering is someone might know this for the SI-22G, for the moment I’m using 190 to recalculate it for my DIY GM counter.

For those interested, the code is:

// Tube dead time in seconds
// SI-22G = 0.000xxx seconds
// SBM-20 = 0.000190 seconds
#define tubeDeadTime 0.000190

actual_cps_1 = (cps_1 / (1- (cps_1 * tubeDeadTime)));

where CPS is Counts Per Second. The _1 is used for my first tube (out of 2).