RCA Number Type 38 #38 Vacuum Tube Valve Engraved Base Shoulder Shape NOS NIB 1st Quarter BW01 From left to right

From left to right

This matched pair of RCA black plate 5763 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

56/58 and 64/64

It has 93S6 provenance/date codes

Transconductance measured (From left to right): 41

RCA Number Type 38 #38 Vacuum Tube Valve Engraved Base Shoulder Shape NOS NIB 1st Quarter BW01 From left to rightThis new old stock, new in box RCA number type #38 tube tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY