NOS Sylvania 17AX4GTA Vacuum Tube - White Box - Tested

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RCA 17AX4GTA Vacuum tube Tested Good

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(1) Tested Sylvania 17AX4GTA/17DM4A Tube Date Code aj ECC 17AX4 GTA 17DM4 A Tube

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Silverstone 17AX4 Vacuum Tube Tests Strong 80 Mercury 990 Vintage USA Rectifier

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