Pair NATIONAL UNION, W. E Type 350B TYPE Vacuum Tube 100
Item History & Price
| Reference Number: Avaluer:17893456 | Model: 350B |
| Brand: National Union | MPN: 350B |
| Type: Vacuum Tube |
DESCRIPTION:Pair NATIONAL UNION, W.E Type 350B Vacuum tube Tested 100%Western Electric Type 350B ConditionTube:Used Tested as NOS Box: Plain Lettering: 98-100%Date Code: N/A
TESTED IN A HICKOK VT-7D/U1) Filament 2) checked for shorts, Leakage 3) Grid (Gas) 4) Emission Test 5) Dynamic Mutual Conductance Result on Tube 1 ( 53GM ) Minimum Value = 31=110% Tu...be 1 ( 51GM ) Minimum Value = 31=106%Where NOS Value = 48Hickok 752A@650 & 625 = 105% & 102% Where Minimum is 400 Since vacuum tubes were made 30 ? 70 years ago New Old Stock or Used may have cosmetic evidence of age. This includes poor print, oxidized pins, faint discoloration, or poorly boxTwo testers are never the same. So this shows what I get, and what you get may be +-10-15% slightly different.If I state any values they are for a guide only.No guarantee is made that any tube will test to a specific value in the buyer's tube tester, most all tubes are tested on at least two tube testersThis because of the variation in line voltage, different bias, and circuits. Return PolicyGuarantee:
Contact UsIf you're in any way dissatisfied with your purchase, do not hesitate to contact us through "MY MESSAGES". We will do our best to solve it for you. We are committed to ensuring that you are completely satisfied with every transaction.So Please DO contact us first to get a better solution before you would leave Negative or Neutral feedback.
TESTED IN A HICKOK VT-7D/U1) Filament 2) checked for shorts, Leakage 3) Grid (Gas) 4) Emission Test 5) Dynamic Mutual Conductance Result on Tube 1 ( 53GM ) Minimum Value = 31=110% Tu...be 1 ( 51GM ) Minimum Value = 31=106%Where NOS Value = 48Hickok 752A@650 & 625 = 105% & 102% Where Minimum is 400 Since vacuum tubes were made 30 ? 70 years ago New Old Stock or Used may have cosmetic evidence of age. This includes poor print, oxidized pins, faint discoloration, or poorly boxTwo testers are never the same. So this shows what I get, and what you get may be +-10-15% slightly different.If I state any values they are for a guide only.No guarantee is made that any tube will test to a specific value in the buyer's tube tester, most all tubes are tested on at least two tube testersThis because of the variation in line voltage, different bias, and circuits. Return PolicyGuarantee:
Contact UsIf you're in any way dissatisfied with your purchase, do not hesitate to contact us through "MY MESSAGES". We will do our best to solve it for you. We are committed to ensuring that you are completely satisfied with every transaction.So Please DO contact us first to get a better solution before you would leave Negative or Neutral feedback.
