G27942 ~ Extremely Rare Type 200N Amperex Alpha, Beta and Gamma Mica Window Geiger Muller Tube
Detailed Description
Large mica end window neon-filled Geiger Mueller tube by Amperex type 200N is made for the detection of Alpha particles, however it also detects Beta and Gamm rays. The 200N has a 1.31" dia. Mica end window and an overall size of 4" long x 0.12" dia. near window (-) end and 0.255" dia. at the (+) positive tip.
The specs are as follows:
- Plateau is in excess of 200V
- Slope plateau 5% to 10% per 100V
- Dead time approx. 200 microseconds
- 50 counts per minute max background (shielded 2" lead).
The 200N operates from 700 to 900VDC. All of the specs are from the 1958 Amperex Electron Tubes & Semiconductor catalog. The Amperex 200N tubes that we have are New Old Stock and we test each one for operation before shipping. Limited Quantity.
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WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov - Why is this here?
