[Milsurplus] Viz radiosonde ?

[Michael Bittner]

Here ya go Hue.  AMT-3 with 3A4, not 3A5.  Attached is my reverse engineering schematic from one I bought from Fair Radio.
  ----- Original Message ----- 
  From: Hubert Miller 
  To: tetrode at googlegroups.com ; Milsurplus at mailman.qth.net 
  Sent: Friday, March 17, 2017 2:15 PM
  Subject: [Milsurplus] Viz radiosonde ?


  I seem to recollect that a few decades back, Fair Radio had some "Viz" ( manufacturer ) radiosondes.  Is my memory true?

  Anyway, anyone seen a schematic for the same? Did the set possibly have a military type number also? 

  I have one, with a calibration paper tape of some kind. I like the looks and feel of the flimsy milk-white plastic assembly. 

  I kind of am mystified how well  the cardboard section just below the RF electronics dome, could last in bad  weather.

  I would like to try to power the thing up. 

   

  BTW, what was the WW2 Army radiosonde that used a single 3A5 tube and a 3395 kHz crystal and no tuned output circuit?

  I know Robert ( Answer Man ) identified this years ago for me, but i have quite forgotten.

  I have only the small chassis of this thing. I wonder what the package looked like. I recall that in the early 1960s, surplus 

  stores had bunches of these. 
  Well, i suppose they had bunches of everything in those days.

  -H 



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