[R-390] meter luminescence

[Barry]

I have (at least I think I still have) one of those clocks and I've wondered how "hot" it is.  I thought about restoring it but don't relish the idea of handling the parts until I know more about it.  The last I remember about it, I had the parts "well protected" in a plastic shopping bag so I'm not too worried about it.  :)

Regards,
Barry - N4BUQ

> Yeah, I should have clarified that when I got the 'hot' reading, I
> had the "beta shield" on the CDV-700's probe open, and the meter was
> pegged on the meter's most sensitive range (though at times, trying
> the next setting up showed some meter deflection). With the beta
> shield closed, the count was far lower, naturally, though I did get
> some deflection. I wasn't going for an accurate reading, just to see
> what reaction I got, and get a reaction I did! I also get a 'hot'
> reading from my Jefferson "Golden Hour" 'mystery clock' from the
> 1950s, as seen here:
> 
> http://www.roger-russell.com/jeffers/jefhour.htm
> 
> Unlike the R-39x meters, there's no glass cover to shield the
> radiation, so that could explain the high readings. Still makes me
> nervous every time I have to put my fingers near the hands to set
> the clock...
> -Adam