[Amps] Gas Regulator Tubes

[G3rzp@aol.com]

My understanding is that some of the miniature tubes had a radioactive source in them that had alimited half life. This was to ensure starting under dark conditions. So the actual starting voltage might go high as they get older. How true all this is I don't know, and I find that the VR105s and VR150s I have that date back 50 or more years are still within tolerance.

73

Peter (W8/G3RZP, at Dayton)