6sn7gt kenrad coated glass made in usa amplitrex at1000 tested 3068050 693001

6sn7gt kenrad coated glass made in usa amplitrex at1000 tested 3068050 693001

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1949 Vintage Ken Rad 6SN7GT Vacuum Tube Low Testing Uneven

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6sn7 vt-231 KenRad tube silver foil getter copper rods black plate ribbed strong

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Two, Ken-Rad VT-231, JAN CKR 6SN7GT, wartime, black plate, copper, match pair #3

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JAN 6SN7GT VT231 KENRAD Mil Grade made In U.S.A amplitrex AT1000 Tested

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EXCELLENT WORKING NOS MATCHED PAIR KENRAD VT-231 6SN7GT TUBES OFF-SET PLATES B65

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6SN7GT Ken Rad Square Getter 188 Codes Matched Pair (2 tubes)

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RARE NOS PAIR VT231 - KEN-RAD 6SN7 - 1940's - 6SN7GT USA STRONG VALUES

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pair VT-231 JAN-CKR Ken-Rad staggered plates,NOS USA code N-4,early 50*s 6SN7

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2, Ken-Rad VT-231, JAN CKR 6SN7GT, wartime, black plate, copper, match date pair

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