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 2.GQ Geiger Muller Counter
 GMC-280 and 6107/BS212		  New Topic  Reply to Topic
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brianweber4

USA
10 Posts
Posted - 02/04/2012 :  16:48:49  Show Profile  Reply with Quote
The US military surplus 6107/BS212 mica end window geiger tube works great in the GMC-280 geiger kit. Note the hole I drilled in the top half of the case to allow Alpha particles/Beta radiation to reach the geiger tube's mica end window!

Image Insert:

127.11 KB
Edited by - brianweber4 on 02/04/2012 17:19:04
Reply #1

ZLM

1261 Posts
Posted - 02/04/2012 :  22:14:22  Show Profile  Reply with Quote
Thank you for sharing your good work.

How do you test the Alpha ray?

By the way, it is a nice picture.
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Reply #2

brianweber4

USA
10 Posts
Posted - 02/06/2012 :  09:19:04  Show Profile  Reply with Quote
I'm using an Am241 source from a smoke detector to generate Alpha particles (radiation). The 6107/BS212 geiger tube (and GMC-280) go completely nuts when the Am241 is brought near, but all Alpha can blocked with a sheet of paper in front of the hole I drilled in the GMC-280's case! Kinda cool!
Edited by - brianweber4 on 02/06/2012 09:23:41
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Reply #3

CPRitter

4 Posts
Posted - 02/10/2012 :  14:11:57  Show Profile  Reply with Quote
Nice work!

Where did you get the tube?

Have you put a protective screen over the hole and if so, what mesh and how much attenuation did it introduce?

Thanks for the post!
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Reply #4

brianweber4

USA
10 Posts
Posted - 02/11/2012 :  08:58:39  Show Profile  Reply with Quote
Thanks! I think this 6107/BS212 tube came from an internet tube seller and cost around $12.00 USD. I also bought one on ebay for maybe around $40.00?? I am not using any screen, just the hole drilled in the case. If you want there is a nice USSR end window tube sometimes on ebay, a SBT-9 or maybe you can find a 6107/BS212. I tested the SBT-9 and the 6107/BS212 and both work great with the GMC-280 and both fit in the case too. I did have to unsolder and move the tube clips, solder wires to the new clip locations and drill the hole in the case, not too hard to do!

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24.55 KB
Edited by - brianweber4 on 02/11/2012 09:13:23
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