NOS NIB Date Matched Quad (4) RFT Germany / Tungsram CV4003 [12AU7] Vacuum Tubes

$109.75

Tube Type / Number: CV4003 [British Military Designation for 12AU7]
Actual Brand*: RFT / Tungsram
Printed Brand: Chelmer Valve
Quantity: 4 Pieces - Matched Quad
Matching Date Codes? 
Plate Construction: Gray
Getter Construction: Small Top O, Foil Getter Post (this is how we know it's an RFT tube)
Country of Manufacture: Germany
Visible Date Codes: 6087
Lettering Condition: 100 Percent
Number of Mica Spacers: 2
Mica Spacer Shape: 
Glass Coating: None
Engraved Base? No
Boxes (always included): 4 Boxes - Original
Notes: 

Testing: We have multiples of these in stock and therefore are not listing the test results here. All of these have been tested and or matched by/for Gain
 and Gm at real world voltage on a Maxi-Matcher tube tester. Test results are on box.

 

** Please note, many tubes will test NOS but will actually have a few hours of use on them. A truly NOS tube will have excellent getter flashing condition, no dirt/grime, usually in the original box, and no filament deposits. If a tube is listed  as "tests NOS" but is listed as "not True NOS" please expect the tube to have a small amount of use * 

All tubes have been tested using only the best tube testers. We have a large fleet of tube testers, and every single one of them has been calibrated within the last year by industry experts. We mainly use the Hickok TV-7D/U, but occasionally we may use a Hickok 539, 533A, or 600A.

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Description

Tube Type / Number: CV4003 [British Military Designation for 12AU7]
Actual Brand*: RFT / Tungsram
Printed Brand: Chelmer Valve
Quantity: 4 Pieces - Matched Quad
Matching Date Codes? 
Plate Construction: Gray
Getter Construction: Small Top O, Foil Getter Post (this is how we know it's an RFT tube)
Country of Manufacture: Germany
Visible Date Codes: 6087
Lettering Condition: 100 Percent
Number of Mica Spacers: 2
Mica Spacer Shape: 
Glass Coating: None
Engraved Base? No
Boxes (always included): 4 Boxes - Original
Notes: 

Testing: We have multiples of these in stock and therefore are not listing the test results here. All of these have been tested and or matched by/for Gain
 and Gm at real world voltage on a Maxi-Matcher tube tester. Test results are on box.

 

** Please note, many tubes will test NOS but will actually have a few hours of use on them. A truly NOS tube will have excellent getter flashing condition, no dirt/grime, usually in the original box, and no filament deposits. If a tube is listed  as "tests NOS" but is listed as "not True NOS" please expect the tube to have a small amount of use * 

All tubes have been tested using only the best tube testers. We have a large fleet of tube testers, and every single one of them has been calibrated within the last year by industry experts. We mainly use the Hickok TV-7D/U, but occasionally we may use a Hickok 539, 533A, or 600A.

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Additional info

SKU: MUL118-4
Shipping: Calculated at Checkout