4 General Electric GE 2D21 Vacuum Tubes NOS NIB Lot Of Four Quad Other Great Hits

4 General Electric GE 2D21 Vacuum Tubes NOS NIB Lot Of Four Quad Other Great HitsThese four new old stock, new in box GE 2D21 tubes tested to spec on our TV7. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN VALUE. IF AN ITEM

new in box US-made National 2N688 rectifiers

Both tubes have 2-48 SC 471 date/contract codes and are World War Two vintage

a crenelated

Transconductance measured 22 where minimum (65%) is 15

new in box Sylvania 12HG7 / 12GN7 / 12GN7A tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 6CB6A / 6CF6 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 6JT8 tubes tested to spec on our Paul Hart-calibrated TV7/U

72 and 75 respectively

new in box International 6LF6 / 6MH6 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box Sylvania 7Y4 tubes in this lot

new in box GE 25BK5 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 38HK7 tube tested to spec on our Paul Hart-calibrated Hickok TV7/U