WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
Looking fro a tube chart for a NRI model 70 tube chart. I am missing the last 2 pages of mine. I found one on ebay but wish I could find on the web for free.