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 2.GQ Geiger Muller Counter
 GMC-320 anode resistor for M4011

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T O P I C    R E V I E W
Alchemy2 Posted - 09/09/2014 : 11:30:51
ZLM,

What is the value of the resistor used in the GMC-320 for the M4011 tube, the one at the anode? I am looking at modifying my second GMC-320 for use with a SBT-11A pancake tube, and want to verify what I'll need to get the 4.7-5M total resistive loading at the anode. Thanks in advance!

3   L A T E S T    R E P L I E S    (Newest First)
Alchemy2 Posted - 09/10/2014 : 19:08:24
I'm looking forward in about 10 days in testing both my stock 320+ and the new one due to arrive tomorrow, with a pancake tube and evaluate the CPM/dose ratios with my radioactive calibration samples.

I'll post all the details when I get them. should be close to end Sept. for the tube, and samples.
Alchemy2 Posted - 09/10/2014 : 19:06:43
Perfect! So I can just use the clip connections and solder the short cable to the tube then. Nice.

Thanks!
ZLM Posted - 09/10/2014 : 10:13:31
On board PCB has 6 M ohm resistr. That is good for your pancake tube.

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