20 Hz v.mp4Single wire good NO AUDIO.mp420240124 201400 1.mp4  

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2 - 12NO180T  Time delay tube --- This is the correct time delay for the SR-2000 /P2000.

      These delay tubes are the only 12NO180T 180 second 9 pin tubes made by Amperite.       Amperite build them for us years ago.  There were only 24 built.   $70.00 each

  

  

  

  

  

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