(1) Tested Strong Arcturus 10Y Tube with brown base.
Date Code SA.
Some minor scratches around the base. There is some discoloration and nibbling/flea bites around the bottom rim of the base - see photo 7 but this obviously doesn't affect performance.
This tube tests above NOS specs.
Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts or leaks with the following results:
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