[R-390] Radiation VR tubes

[Chris]

I take that back-  I guess most if not all VR tubes use a cold or oxide-coated cathode.  

The link previously posted goes into great detail about what isotopes may be found within, including VR type tubes specifically.  

Chris 

Sent from my outdated iPhone wireless thingy

On Jan 16, 2014, at 5:52 AM, Chris <kc9ieq at yahoo.com> wrote:

> Thorium on the cathode at the least, but all sorts of nasty stuff can be found in different tubes-  Radium included.  
> 
> There are several possibilities listed here-
> http://www.orau.org/ptp/collection/consumer%20products/electrontubes.htm
> 
> Regards,
> Chris 
> 
> Sent from my outdated iPhone wireless thingy
> 
> On Jan 16, 2014, at 5:26 AM, Steve Hobensack <stevehobensack at hotmail.com> wrote:
> 
>> I knew this person that purchased a sleeve of VR tubes at a hamfest. Some of the tubes were 
>> 
>> marked with the radiation symbol. Apparently the radioactivity was to lower the strike voltage.
>> 
>> What is the radioactive element inside?
>> 
>> Steve N8YE
>> 
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