Raytheon
NOS NIB Raytheon USA 7B4 Black Round Plate Chrome Dome Vacuum Tube 100+%
- SKU:
- TH2459
- UPC:
- Raytheon 7B4
- MPN:
- Raytheon 7B4
- Availability:
- Ships in 1 business day or less.
- Shipping:
- Calculated at Checkout
Description
Tube Type / Number: 7B4
Actual Brand*: Raytheon
Printed Brand: Raytheon
Quantity of Tubes: Single
Plate Construction: Black Round
Getter Construction: Top
Country of Manufacture: USA
Visible Date Codes: F4
Lettering Condition: 75 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape:
Smoked Glass? Clear
Engraved Base? No
Boxes Included? 1 Box - Original
Notes: Chrome Dome
Gm Test Results: 52
Minimum Good Value: 26
NOS Test Value: 40
Life Calculation: 100+% (where 65% = fail)
Tests as NOS?: Yes
True NOS?*: Yes
** 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.