From: cesar.bazzi@gmail.com   
      
   El domingo, 23 de abril de 2017, 21:39:55 (UTC-3), se...@hotmail.com escribió:   
   > On Monday, May 19, 2003 at 8:45:00 AM UTC-7, Luis Pla Revuelta wrote:   
   > > Hi   
   > > I am restoring this tube tester from Precision Instruments.   
   > > This model looks very old.No roll chart in this model,so I need the tube   
   data   
   > > sheets/book,and also instruction manual/schematics...   
   > > No info available on the net.   
   > > All help appreciated.   
   > >    
   > > Regards.   
   >    
   > I know this thread is ancient, but I found it for my search for the very   
   same info. This seems to be a real bastard unit, there is _no_ data anywhere   
   on the 900. People say to use the 910 data, which is available, but the 900   
   has different selectors    
   and switches on it. Hope someday someone finds and shares the manual and   
   schematic for this unit.   
      
   Hi, I just bought a working one a few days ago. Mine is Precision 900 series   
   also from 1938. Six tube sockets per side. There's almost no info on this   
   model. It'almost identical to the later models in the 9xx series. But with   
   less buttons and functions.    
   It's limited on the types of tubes you can test since is from the late '30s.   
   For some rectifier tubes you need the extra buttons and controls from later   
   models. The 910 is really close to the "original" 900 but also passed through   
   many revisions. I own    
   also a 954 from 1942 and it's a much more complex beast. Can test many later   
   tubes thanks to the extra control, buttons, etc. Any questions let me know. Bye   
      
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