NOS Raytheon USA 6BL7GT Black Plate Top Get 3 Mica Chipped Base Vacuum Tube

(No reviews yet) Write a Review
Ships in 1 business day or less.
Calculated at Checkout
On Sale
Now: $7.38
Was: $14.76


Tube Type / Number: 6BL7GT
Actual Brand*: Raytheon
Printed Brand: Raytheon
Quantity of Tubes: Single
Plate Construction: Black Wrinkled
Getter Construction: Top
Country of Manufacture: USA
Visible Date Codes: 280 5739 H6M
Lettering Condition: 50 Percent
Year Made:
Mica Spacers: 3
Smoked Glass? No
Engraved Base? No
Boxes Included? 1 Box - Not Original
Notes: Chipped Base

** If the actual brand does not match the printed brand, this is perfectly normal. This is because many manufacturers made tubes for each other and also printed various amplifier and radio brand names on tubes destined for those companies. The actual brand was determined by the EIA codes printed on the tube. In some cases, the brand will be determined by the tube's construction **

General Mutual Transconductance (Gm) Test Results:

46/45 Where the Minimum is: 25/25 and the NOS value is: 41/41
100+% of what a NOS tube should test where the Minimum "good" value is 65%

Tests NOS?: Yes
True NOS?*: No

** 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.

View AllClose

Additional Information

Item Type:
Vacuum Tubes
Production Era:
Vintage & NOS
View AllClose