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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 ******* 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.