Great, thanks! I surely would've noticed the + and - on the circuit board after removing the SBM-20, but thanks for clarifying the polarity of the LND-712.
SparkFun's "mount" looks, um... functional, but I guess it'll work if I can't come up with anything better. Thanks again!
_john
Search found 4 matches
- Thu Nov 24, 2011 10:41 am
- Forum: Geiger Counter
- Topic: Why the preference of the SBM-20?
- Replies: 18
- Views: 63351
- Thu Nov 24, 2011 7:25 am
- Forum: Geiger Counter
- Topic: Why the preference of the SBM-20?
- Replies: 18
- Views: 63351
Re: Why the preference of the SBM-20?
See if you can find an LND-712 tube, it should work with the kit and has an end window for alpha/low energy beta. OK, I got the LND-712 tube; is there anything special I need to think about when modifying the kit for it? Is there a positive and negative to the connections (I'd guess not)? Can anyon...
- Mon Nov 07, 2011 6:52 pm
- Forum: Geiger Counter
- Topic: Why the preference of the SBM-20?
- Replies: 18
- Views: 63351
Re: Why the preference of the SBM-20?
Thanks for the tip, I'll try to track one down and give it a shot.
Regards,
_john
Regards,
_john
- Mon Nov 07, 2011 10:01 am
- Forum: Geiger Counter
- Topic: Why the preference of the SBM-20?
- Replies: 18
- Views: 63351
More sensitive tube?
I am a watchmaker and built the kit with the intention of identifying radioactive dials and hands. Many older watches used Tritium and VERY old watches used Radium to make the dials and hands glow in the dark. The SBM-20 tube is able to pick up Radium (the stuff gives off alpha, beta and gamma radia...