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 2.GQ Geiger Muller Counter
 GMC-320 anode resistor for M4011
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Alchemy2

Canada
89 Posts

Posted - 09/09/2014 :  11:30:51  Show Profile  Reply with Quote
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!


The more I learn, the more I realize I do not know!
Reply #1

ZLM

1261 Posts

Posted - 09/10/2014 :  10:13:31  Show Profile  Reply with Quote
On board PCB has 6 M ohm resistr. That is good for your pancake tube.
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Reply #2

Alchemy2

Canada
89 Posts

Posted - 09/10/2014 :  19:06:43  Show Profile  Reply with Quote
Perfect! So I can just use the clip connections and solder the short cable to the tube then. Nice.

Thanks!

The more I learn, the more I realize I do not know!
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Reply #3

Alchemy2

Canada
89 Posts

Posted - 09/10/2014 :  19:08:24  Show Profile  Reply with Quote
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.

The more I learn, the more I realize I do not know!
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