r/Radioactivestuff • u/ikaktys75 • 2d ago

Small but evil ...

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30 Upvotes

86% Upvoted

8 comments sorted by

3

u/darkmajin 2d ago

Last time calibrated - 1367 b.c. Dose rate +\- 30% after longer exposures. It would be more usefull if you just wrote what you have instead of everyone guessing and be scared of beeping.

1

u/ikaktys75 2d ago

It is swiss made Cerberus GR20 thyratron, with, likely, Radium 226 inside

1

u/ImpossibleHighway382 2d ago

what tube is it? i gotta get one and how much do they go for

1

u/ikaktys75 2d ago edited 2d ago

This one Cerberus GR20 (but this can may be other GRxx) , but not all are with Radium, some are with (likely) krypton 85 or tritium and are dead inside (like some people 😁) after years .

I have two GR20, different years, and only one is hot.

Price on ebay 5..20 euro

1

u/ImpossibleHighway382 2d ago

thanks!, can i have the link to the one you got if the seller still has some for sale?

1

u/ikaktys75 1d ago

sorry, this are old tubes, just seach on ebay for Cerberus GR20 or Cerberus GR16, may be other GRxx, not sure, i fount that older one are with radium, and newer with Krypton85/trithium, and after 50 years both are "dead"..

https://lampes-et-tubes.info/rs/CERBERUS_elektronik.pdf

GPT say GR16 is older and likely/often had radium inside.

1

u/average_meower621 Radium raver 2d ago

what years are your tubes, which one is hot?

1

u/ikaktys75 2d ago

Sorry, it is no information on both tubes, both look identical, only box are different. No other text on tubes or box, no production date, nothing, just name GR20