Western Electric 350B Tubes - USN-CW-350B Matched Pair - US Navy Tube - Holy Grail 6L6


This listing is for a matched pair of Holy Grail 6L6 vintage Western Electric tubes.

Cosmetic Notes:

• One tube appears to have some type of brown material built into the base. This tube's base is also slightly loose but could be easily firmed up with a bit of glue if desired. Does not affect functionality.

• Getter flashes are in great shape.

These tubes were tested on our modern and professional Amplitrex AT-1000 Tester.

They both tested very close to NOS Spec and are matched within 1% for plate current and within 4% for Gm. See Results Below:

Plate Current % of NOS / Gm % of NOS - Measured Plate Current in mA

Tube 1: 96/102 - 90mA
Tube 2: 97/98 - 90.8mA

These tubes were also tested for function in an audio circuit in one of our restored and fully functional McIntosh MC240 Amplifiers.



Original Box





Not Applicable


Not Applicable

Physical Condition


Working Condition


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