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(1) Tested Very Strong Arcturus 551 Tube Blue Arcturus Type 51 Tube Tetrode (e)

(1) Tested Very Strong Arcturus 551 Tube Blue Arcturus Type 51 Tube Tetrode (e)

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$32.95 USD
$32.95 USD
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(1) Tested Very Strong Arcturus Type 551 (Type 51) Blue Globe Balloon Tube.

There is a very faint hairline crack in the base located above the letter "R" - see photo 3.

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:

Test Result = 1200 micromhos
Minimum pass/good = 640
NOS Target Value = 960

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