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45264

Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

Great point, Steve.  While most people think of the Pb-210 check source on CDV-700s as primarily a beta source, the decay of Pb-210 does yield some gamma
Ken Sejkora
10:38 AM
#45264
 
45263

Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

Hi Ken, yes this topic came up a while back in the GCE group, and I was able to get a Pb-210 check source from a Lionel 6B that a forum member had, and did
    Steve Dubyk
    7:25 AM
    #45263
    This message has attachments
    45262

    Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

    You're right, Cliff.  Some sources were indeed DU, which would decay with a half-life of 4.5 billion years.  But many of them were actually Radium-D
    Ken Sejkora
    6:46 AM
    #45262
     
    45261

    Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

    Back in the early days of nuclear science and  uranium prospecting, the decay series of the various uranium and thorium isotopes (U-235, U-238, Th-232, etc.)
    Ken Sejkora
    6:43 AM
    #45261
     
    45260

    Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

    Dear Ken, Michi, et al.;     But most likely many of these check sources were manufactured in 1963 or before.  If the check source is Depleted Uranium,
      Defender
      11:25 PM
      #45260
      This message has attachments
      45259

      Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

      It is Pb-210 that has the 22 year half life, and it was used as a check source on some CDV-700s such as the Lionel 6B. Radium and DU are the other two common
      Steve Dubyk
      10:43 PM
      #45259
       
      45258

      Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

      On 9/15/2017 5:58 PM, Ted Blackwell tblackwell597@... [CDV700CLUB] ... The Anton Model 5 and 6 repair manual was also available as a public domain scan
      Geoffrey Mendelson
      9:47 PM
      #45258
       
      45257

      Re: you know you're a geiger geek when....

      Yes, I remember. Just seeing the hand written tube number in that video triggered my geiger geek-dar. :) -Chris ....
      C. R.
      8:12 PM
      #45257
       
      45256

      Re: you know you're a geiger geek when....

      Dear Chris,     What you want is the Westinghouse 1B35 -- my collection ranges from 15,000 to 225,000 CPM using my Ludlum 44-9 pancake probe and scaler. 
      Defender
      8:03 PM
      #45256
       
      45255

      Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

      Dear Michi,     Here's the current product equivalent tube to the 6993: *LND720 Thin Wall Beta-Gamma Detector  (6993 equivalent)*
      Defender
      7:51 PM
      #45255
       
      45254

      Re: New to CDV-700s, Anton Model 5 restore, looking for some pointer

      Dear Michi,     Radium-226 has a 1,600 year half life. ~Cliff ... Dear Michi,     Radium-226 has a 1,600 year half life.  ~Cliff On 9/2/2017 3:49 PM,
      Defender
      6:33 PM
      #45254
       
      45253

      Re: A little help, crazy meter

      Thank you everyone for the responses. It was static charged (I’ll have to see what caused it.) Using a dryer sheet took care of it and now works normally.
      Mike Vidal
      Sep 22
      #45253
       
      45252

      Re: A little help, crazy meter

      The plastic meter is charged with static mix up some anti static fluid - 1/3 isopropyl alcohol and 2/3 DISTILLED water plus a few drops of dish soap spray it
      Michael J Emerson
      Sep 22
      #45252
       
      45251

      A little help, crazy meter

      Hello All: I have an Electro Nucleonics CDV-700 6B that has a meter that is semi non responsive. It will stick half way and then I can wipe my fingers across
      Mike Vidal
      Sep 22
      #45251
       
      45250

      Re: CDV-705 Model No. 1 Speaker by Jordan Electronics

      ... Hi Mike, how do I see your e-mail address? Click reply Click on the little arrows (chevrons) to the left of "Subject" to expand the header On the "To"
      m1i8k3e6
      Sep 21
      #45250
       
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